add "temporary value borrowed for too long" error

[mikhail-m1]

Issue #54131

r? @nikomatsakis

[bors]

☔ The latest upstream changes (presumably #54088) made this pull request unmergeable. Please resolve the merge conflicts.

[nikomatsakis]

Few nits

[nikomatsakis]

So, there is actually a standard template for these errors we ought to follow.

[nikomatsakis]

I took a stab at a conformant write-up:

https://gist.github.com/nikomatsakis/10349c6242aad639b2e89eada6fffb7a

(you can get the raw text from there)

[pnkfelix]

Make sure to check over the examples in that gist; don't just cut-and-paste their content blindly. In particular, the fn bar's, starting on line 8, probably should be returning a &i32, not a i32.

(The code as written doesn't compile because it tries to dereference an i32, but that's not the error we are trying to illustrate here.)

[nikomatsakis]

Note that, unless the example is tagged with ignore, we actually test this.

[pnkfelix]

(True; not everyone runs the full test suite locally, but the error would have been caught.)

[nikomatsakis]

let's phrase this: "temporary value dropped while borrowed"

[pnkfelix]

@bors r+

[bors]

☔ The latest upstream changes (presumably #54310) made this pull request unmergeable. Please resolve the merge conflicts.

[pnkfelix]

@bors r+

[bors]

📌 Commit 0397eb0 has been approved by pnkfelix

[pnkfelix]

(I want this to land asap because its effects are going to interact with whatever diagnostic I develop as our short-term fix for resolving #21114 )

[bors]

⌛ Testing commit 0397eb0 with merge e6cba0cdbea6a8119bd0991f00edc1629a50ce3b...

[bors]

💔 Test failed - status-appveyor

[pnkfelix]

I'm pretty sure this needs to be rebased, because the diagnostic code it adds to librustc_mir/diagnostics.rs collides with another one that was added to liburstc_typeck/diagnostics.rs by another PR in the meantime.

(This is something that the Travis-autobuild on your pull request won't catch until you rebase, but bors will catch it during the trial merge after an r+)

[pnkfelix]

@bors r+

[bors]

📌 Commit d773f7c6a6d2ae9fc0a401991791cd4a299f5f50 has been approved by pnkfelix

[rust-highfive]

The job x86_64-gnu-llvm-5.0 of your PR failed on Travis (raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

Click to expand the log.

[00:53:15] .................................................................i...i................ii............
[00:53:17] ....................................................................................iii.............
[00:53:20] .....................iii.......................................................i..........i.........
[00:53:23] .................i..................................................................................
[00:53:28] ....................................................................................F.......F.FFF.F.
[00:53:33] ...............FF.........i...........i.............................................................
[00:53:36] .............................................iiiii..................................................
[00:53:41] .................iiiiiiii...........................................................................
[00:53:43] ....................................................................................................
[00:53:45] ....................................................................................................
[00:53:47] ....................................................................................................
[00:53:47] ....................................................................................................
[00:53:50] .....................................i..............................................................
[00:53:53] ....i...............................................................................................
[00:53:56] ....................................................................................................
[00:53:59] ....F......................................................................................i........
[00:54:01] ............F.......F...............................................................................
[00:54:05] ....................................................................................................
[00:54:07] .................................F.....................i...................................F.F......
[00:54:10] ........................................................................F...........................
[00:54:13] .................................................................................................F..
[00:54:16] ....iiiiiiiii.......................................................................................
[00:54:19] ...............F............ii..................................................................F...
[00:54:25] ........................................................................................i...........
[00:54:28] ....................................................................................................
[00:54:31] ................................................i.i..ii.............................................
[00:54:34] ....................................................................................................
[00:54:34] ....................................................................................................
[00:54:37] ........................................................................i......................i....
[00:54:40] ....................................................................................................
[00:54:43] ....................................................................................................
[00:54:46] .........i..i..i...............F.....i..Fi.............ii.........F.............ii............F..F.F
[00:54:49] ......iiiii....F......................................................................iiiii.........
[00:55:02] ....................................................................................................
[00:55:09] ....................................................................................................
[00:55:16] ....................................................................................................
[00:55:24] ....................................................................................................
---
[00:58:58] ....................................................................................................
[00:59:06] ....................................................................................................
[00:59:14] ....................................................................................................
[00:59:20] ....................................................................................................
[00:59:23] ..............................F.F............F.............................................F........
[00:59:27] F...............................F.........FF........................................................
[00:59:33] ....................................................................................................
[00:59:36] ....................................................................................................
[00:59:36] ....................................................................................................
[00:59:38] ............................i.ii.ii.ii.............................i.......................F........
[00:59:39] failures:
[00:59:39] [00:59:39] ---- [ui (nll)] ui/consts/const-eval/union_promotion.rs stdout ----
[00:59:39] diff of stderr:
[00:59:39] diff of stderr:
[00:59:39] [00:59:39] - error[E0714]: temporary value dropped while borrowed
[00:59:39] + error[E0716]: temporary value dropped while borrowed
[00:59:39] 3 |
[00:59:39] 3 |
[00:59:39] 4 LL | let x: &'static bool = &unsafe { //~ borrowed value does not live long enough
[00:59:39] 13 [00:59:39] 14 error: aborting due to previous error
[00:59:39] 15 [00:59:39] - For more information about this error, try `rustc --explain E0714`.
[00:59:39] - For more information about this error, try `rustc --explain E0714`.
[00:59:39] + For more information about this error, try `rustc --explain E0716`.
[00:59:39] 17 [00:59:39] [00:59:39] [00:59:39] The actual stderr differed from the expected stderr.
[00:59:39] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/consts/const-eval/union_promotion.nll/union_promotion.nll.stderr
[00:59:39] To update references, rerun the tests and pass the `--bless` flag
[00:59:39] To only update this specific test, also pass `--test-args consts/const-eval/union_promotion.rs`
[00:59:39] error: 1 errors occurred comparing output.
[00:59:39] status: exit code: 1
[00:59:39] status: exit code: 1
[00:59:39] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/ui/consts/const-eval/union_promotion.rs" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/consts/const-eval/union_promotion.nll/a" "-Zborrowck=mir" "-Ztwo-phase-borrows" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/consts/const-eval/union_promotion.nll/auxiliary" "-A" "unused"
[00:59:39] ------------------------------------------
[00:59:39] [00:59:39] ------------------------------------------
[00:59:39] stderr:
[00:59:39] stderr:
[00:59:39] ------------------------------------------
[00:59:39] {"message":"temporary value dropped while borrowed","code":{"code":"E0716","explanation":"\nThis error indicates that a temporary value is being dropped\nwhile a borrow is still in active use.\n\nErroneous code example:\n\n```compile_fail,E0716\n# #![feature(nll)]\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet p = bar(&foo());\n // ------ creates a temporary\nlet q = *p;\n```\n\nHere, the expression `&foo()` is borrowing the expression\n`foo()`. As `foo()` is call to a function, and not the name of\na variable, this creates a **temporary** -- that temporary stores\nthe return value from `foo()` so that it can be borrowed.\nSo you might imagine that `let p = bar(&foo())` is equivalent\nto this:\n\n```compile_fail,E0597\n# fn foo() -> i32 { 22 }\n# fn bar(x: &i32) -> &i32 { x }\nlet p = {\n let tmp = foo(); // the temporary\n bar(&tmp)\n}; // <-- tmp is freed as we exit this block\nlet q = p;\n```\n\nWhenever a temporary is created, it is automatically dropped (freed)\naccording to fixed rules. Ordinarily, the temporary is dropped\nat the end of the enclosing statement -- in this case, after the `let`.\nThis is illustrated in the example above by showing that `tmp` would\nbe freed as we exit the block.\n\nTo fix this problem, you need to create a local variable\nto store the value in rather than relying on a temporary.\nFor example, you might change the original program to\nthe following:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = foo(); // dropped at the end of the enclosing block\nlet p = bar(&value);\nlet q = *p;\n```\n\nBy introducing the explicit `let value`, we allocate storage\nthat will last until the end of the enclosing block (when `value`\ngoes out of scope). When we borrow `&value`, we are borrowing a\nlocal variable that already exists, and hence no temporary is created.\n\nTemporaries are not always dropped at the end of the enclosing\nstatement. In simple cases where the `&` expression is immediately\nstored into a variable, the compiler will automatically extend\nthe lifetime of the temporary until the end of the enclosinb\nblock. Therefore, an alternative way to fix the original\nprogram is to write `let tmp = &foo()` and not `let tmp = foo()`:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = &foo();\nlet p = bar(value);\nlet q = *p;\n```\n\nHere, we are still borrowing `foo()`, but as the borrow is assigned\ndirectly into a variable, the temporary will not be dropped until\nthe end of the enclosing block. Similar rules apply when temporaries\nare stored into aggregate structures like a tuple or struct:\n\n```\n// Here, two temporaries are created, but\n// as they are stored directly into `value`,\n// they are not dropped until the end of the\n// enclosing block.\nfn foo() -> i32 { 22 }\nlet value = (&foo(), &foo());\n```\n"},"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/const-eval/union_promotion.rs","byte_start":579,"byte_end":681,"line_start":19,"line_end":21,"column_start":29,"column_end":6,"is_primary":true,"text":[{"text":" let x: &'static bool = &unsafe { //~ borrowed value does not live long enough","highlight_start":29,"highlight_end":82},{"text":" Foo { a: &1 }.b == Foo { a: &2 }.b","highlight_start":1,"highlight_end":43},{"text":" };","highlight_start":1,"highlight_end":6}],"label":"creates a temporary which is freed while still in use","suggested_replacement":null,"suggestion_applicability":null,"expansion":null},{"file_name":"/checkout/src/test/ui/consts/const-eval/union_promotion.rs","byte_start":683,"byte_end":684,"line_start":22,"line_end":22,"column_start":1,"column_end":2,"is_primary":false,"text":[{"text":"}","highlight_start":1,"highlight_end":2}],"label":"temporary value is freed at the end of this statement","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"borrowed value must be valid for the static lifetime...","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"error[E0716]: temporary value dropped while borrowed\n --> /checkout/src/test/ui/consts/const-eval/union_promotion.rs:19:29\n |\nLL | let x: &'static bool = &unsafe { //~ borrowed value does not live long enough\n | _____________________________^\nLL | | Foo { a: &1 }.b == Foo { a: &2 }.b\nLL | | };\n | |_____^ creates a temporary which is freed while still in use\nLL | }\n | - temporary value is freed at the end of this statement\n |\n = note: borrowed value must be valid for the static lifetime...\n\n"}
[00:59:39] {"message":"aborting due to previous error","code":null,"level":"error","spans":[],"children":[],"rendered":"error: aborting due to previous error\n\n"}
[00:59:39] {"message":"For more information about this error, try `rustc --explain E0716`.","code":null,"level":"","spans":[],"children":[],"rendered":"For more information about this error, try `rustc --explain E0716`.\n"}
[00:59:39] ------------------------------------------
[00:59:39] [00:59:39] thread '[ui (nll)] ui/consts/const-eval/union_promotion.rs' panicked at 'explicit panic', tools/compiletest/src/runtest.rs:3238:9
[00:59:39] note: Run with `RUST_BACKTRACE=1` for a backtrace.
[00:59:39] note: Run with `RUST_BACKTRACE=1` for a backtrace.
[00:59:39] [00:59:39] ---- [ui (nll)] ui/consts/const-int-conversion.rs stdout ----
[00:59:39] diff of stderr:
[00:59:39] [00:59:39] - error[E0714]: temporary value dropped while borrowed
[00:59:39] + error[E0716]: temporary value dropped while borrowed
[00:59:39] 3 |
[00:59:39] 3 |
[00:59:39] 4 LL | let x: &'static i32 = &(5_i32.reverse_bits());
[00:59:39] 9 |
[00:59:39] 9 |
[00:59:39] 10 = note: borrowed value must be valid for the static lifetime...
[00:59:39] 11 [00:59:39] - error[E0714]: temporary value dropped while borrowed
[00:59:39] + error[E0716]: temporary value dropped while borrowed
[00:59:39] 14 |
[00:59:39] 14 |
[00:59:39] 15 LL | let y: &'static i32 = &(i32::from_be_bytes([0x12, 0x34, 0x56, 0x78]));
[00:59:39] 20 |
[00:59:39] 20 |
[00:59:39] 21 = note: borrowed value must be valid for the static lifetime...
[00:59:39] 22 [00:59:39] - error[E0714]: temporary value dropped while borrowed
[00:59:39] + error[E0716]: temporary value dropped while borrowed
[00:59:39] 25 |
[00:59:39] 25 |
[00:59:39] 26 LL | let z: &'static i32 = &(i32::from_le_bytes([0x12, 0x34, 0x56, 0x78]));
[00:59:39] 31 |
[00:59:39] 31 |
[00:59:39] 32 = note: borrowed value must be valid for the static lifetime...
[00:59:39] 33 [00:59:39] - error[E0714]: temporary value dropped while borrowed
[00:59:39] + error[E0716]: temporary value dropped while borrowed
[00:59:39] 36 |
[00:59:39] 36 |
[00:59:39] 37 LL | let a: &'static i32 = &(i32::from_be(i32::from_ne_bytes([0x80, 0, 0, 0])));
[00:59:39] 42 |
[00:59:39] 42 |
[00:59:39] 43 = note: borrowed value must be valid for the static lifetime...
[00:59:39] 44 [00:59:39] - error[E0714]: temporary value dropped while borrowed
[00:59:39] + error[E0716]: temporary value dropped while borrowed
[00:59:39] 47 |
[00:59:39] 47 |
[00:59:39] 48 LL | let b: &'static [u8] = &(0x12_34_56_78_i32.to_be_bytes());
[00:59:39] 53 |
[00:59:39] 53 |
[00:59:39] 54 = note: borrowed value must be valid for the static lifetime...
[00:59:39] 55 [00:59:39] - error[E0714]: temporary value dropped while borrowed
[00:59:39] + error[E0716]: temporary value dropped while borrowed
[00:59:39] 58 |
[00:59:39] 58 |
[00:59:39] 59 LL | let c: &'static [u8] = &(0x12_34_56_78_i32.to_le_bytes());
[00:59:39] 64 |
[00:59:39] 64 |
[00:59:39] 65 = note: borrowed value must be valid for the static lifetime...
[00:59:39] 66 [00:59:39] - error[E0714]: temporary value dropped while borrowed
[00:59:39] + error[E0716]: temporary value dropped while borrowed
[00:59:39] 69 |
[00:59:39] 69 |
[00:59:39] 70 LL | let d: &'static [u8] = &(i32::min_value().to_be().to_ne_bytes());
[00:59:39] 77 [00:59:39] 78 error: aborting due to 7 previous errors
[00:59:39] 79 [00:59:39] - For more information about this error, try `rustc --explain E0714`.
[00:59:39] - For more information about this error, try `rustc --explain E0714`.
[00:59:39] + For more information about this error, try `rustc --explain E0716`.
[00:59:39] 81 [00:59:39] [00:59:39] [00:59:39] The actual stderr differed from the expected stderr.
[00:59:39] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/consts/const-int-conversion.nll/const-int-conversion.nll.stderr
[00:59:39] To update references, rerun the tests and pass the `--bless` flag
[00:59:39] To only update this specific test, also pass `--test-args consts/const-int-conversion.rs`
[00:59:39] error: 1 errors occurred comparing output.
[00:59:39] status: exit code: 1
[00:59:39] status: exit code: 1
[00:59:39] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/ui/consts/const-int-conversion.rs" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/consts/const-int-conversion.nll/a" "-Zborrowck=mir" "-Ztwo-phase-borrows" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/consts/const-int-conversion.nll/auxiliary" "-A" "unused"
[00:59:39] ------------------------------------------
[00:59:39] [00:59:39] ------------------------------------------
[00:59:39] stderr:
[00:59:39] stderr:
[00:59:39] ------------------------------------------
[00:59:39] {"message":"temporary value dropped while borrowed","code":{"code":"E0716","explanation":"\nThis error indicates that a temporary value is being dropped\nwhile a borrow is still in active use.\n\nErroneous code example:\n\n```compile_fail,E0716\n# #![feature(nll)]\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet p = bar(&foo());\n // ------ creates a temporary\nlet q = *p;\n```\n\nHere, the expression `&foo()` is borrowing the expression\n`foo()`. As `foo()` is call to a function, and not the name of\na variable, this creates a **temporary** -- that temporary stores\nthe return value from `foo()` so that it can be borrowed.\nSo you might imagine that `let p = bar(&foo())` is equivalent\nto this:\n\n```compile_fail,E0597\n# fn foo() -> i32 { 22 }\n# fn bar(x: &i32) -> &i32 { x }\nlet p = {\n let tmp = foo(); // the temporary\n bar(&tmp)\n}; // <-- tmp is freed as we exit this block\nlet q = p;\n```\n\nWhenever a temporary is created, it is automatically dropped (freed)\naccording to fixed rules. Ordinarily, the temporary is dropped\nat the end of the enclosing statement -- in this case, after the `let`.\nThis is illustrated in the example above by showing that `tmp` would\nbe freed as we exit the block.\n\nTo fix this problem, you need to create a local variable\nto store the value in rather than relying on a temporary.\nFor example, you might change the original program to\nthe following:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = foo(); // dropped at the end of the enclosing block\nlet p = bar(&value);\nlet q = *p;\n```\n\nBy introducing the explicit `let value`, we allocate storage\nthat will last until the end of the enclosing block (when `value`\ngoes out of scope). When we borrow `&value`, we are borrowing a\nlocal variable that already exists, and hence no temporary is created.\n\nTemporaries are not always dropped at the end of the enclosing\nstatement. In simple cases where the `&` expression is immediately\nstored into a variable, the compiler will automatically extend\nthe lifetime of the temporary until the end of the enclosinb\nblock. Therefore, an alternative way to fix the original\nprogram is to write `let tmp = &foo()` and not `let tmp = foo()`:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = &foo();\nlet p = bar(value);\nlet q = *p;\n```\n\nHere, we are still borrowing `foo()`, but as the borrow is assigned\ndirectly into a variable, the temporary will not be dropped until\nthe end of the enclosing block. Similar rules apply when temporaries\nare stored into aggregate structures like a tuple or struct:\n\n```\n// Here, two temporaries are created, but\n// as they are stored directly into `value`,\n// they are not dropped until the end of the\n// enclosing block.\nfn foo() -> i32 { 22 }\nlet value = (&foo(), &foo());\n```\n"},"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/const-int-conversion.rs","byte_start":552,"byte_end":574,"line_start":14,"line_end":14,"column_start":28,"column_end":50,"is_primary":true,"text":[{"text":" let x: &'static i32 = &(5_i32.reverse_bits());","highlight_start":28,"highlight_end":50}],"label":"creates a temporary which is freed while still in use","suggested_replacement":null,"suggestion_applicability":null,"expansion":null},{"file_name":"/checkout/src/test/ui/consts/const-int-conversion.rs","byte_start":1317,"byte_end":1318,"line_start":28,"line_end":28,"column_start":1,"column_end":2,"is_primary":false,"text":[{"text":"}","highlight_start":1,"highlight_end":2}],"label":"temporary value is freed at the end of this statement","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"borrowed value must be valid for the static lifetime...","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"error[E0716]: temporary value dropped while borrowed\n --> /checkout/src/test/ui/consts/const-int-conversion.rs:14:28\n |\nLL | let x: &'static i32 = &(5_i32.reverse_bits());\n | ^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use\n...\nLL | }\n | - temporary value is freed at the end of this statement\n |\n = note: borrowed value must be valid for the static lifetime...\n\n"}
[00:59:39] {"message":"temporary value dropped while borrowed","code":{"code":"E0716","explanation":"\nThis error indicates that a temporary value is being dropped\nwhile a borrow is still in active use.\n\nErroneous code example:\n\n```compile_fail,E0716\n# #![feature(nll)]\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet p = bar(&foo());\n // ------ creates a temporary\nlet q = *p;\n```\n\nHere, the expression `&foo()` is borrowing the expression\n`foo()`. As `foo()` is call to a function, and not the name of\na variable, this creates a **temporary** -- that temporary stores\nthe return value from `foo()` so that it can be borrowed.\nSo you might imagine that `let p = bar(&foo())` is equivalent\nto this:\n\n```compile_fail,E0597\n# fn foo() -> i32 { 22 }\n# fn bar(x: &i32) -> &i32 { x }\nlet p = {\n let tmp = foo(); // the temporary\n bar(&tmp)\n}; // <-- tmp is freed as we exit this block\nlet q = p;\n```\n\nWhenever a temporary is created, it is automatically dropped (freed)\naccording to fixed rules. Ordinarily, the temporary is dropped\nat the end of the enclosing statement -- in this case, after the `let`.\nThis is illustrated in the example above by showing that `tmp` would\nbe freed as we exit the block.\n\nTo fix this problem, you need to create a local variable\nto store the value in rather than relying on a temporary.\nFor example, you might change the original program to\nthe following:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = foo(); // dropped at the end of the enclosing block\nlet p = bar(&value);\nlet q = *p;\n```\n\nBy introducing the explicit `let value`, we allocate storage\nthat will last until the end of the enclosing block (when `value`\ngoes out of scope). When we borrow `&value`, we are borrowing a\nlocal variable that already exists, and hence no temporary is created.\n\nTemporaries are not always dropped at the end of the enclosing\nstatement. In simple cases where the `&` expression is immediately\nstored into a variable, the compiler will automatically extend\nthe lifetime of the temporary until the end of the enclosinb\nblock. Therefore, an alternative way to fix the original\nprogram is to write `let tmp = &foo()` and not `let tmp = foo()`:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = &foo();\nlet p = bar(value);\nlet q = *p;\n```\n\nHere, we are still borrowing `foo()`, but as the borrow is assigned\ndirectly into a variable, the temporary will not be dropped until\nthe end of the enclosing block. Similar rules apply when temporaries\nare stored into aggregate structures like a tuple or struct:\n\n```\n// Here, two temporaries are created, but\n// as they are stored directly into `value`,\n// they are not dropped until the end of the\n// enclosing block.\nfn foo() -> i32 { 22 }\nlet value = (&foo(), &foo());\n```\n"},"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/const-int-conversion.rs","byte_start":648,"byte_end":694,"line_start":16,"line_end":16,"column_start":28,"column_end":74,"is_primary":true,"text":[{"text":" let y: &'static i32 = &(i32::from_be_bytes([0x12, 0x34, 0x56, 0x78]));","highlight_start":28,"highlight_end":74}],"label":"creates a temporary which is freed while still in use","suggested_replacement":null,"suggestion_applicability":null,"expansion":null},{"file_name":"/checkout/src/test/ui/consts/const-int-conversion.rs","byte_start":1317,"byte_end":1318,"line_start":28,"line_end":28,"column_start":1,"column_end":2,"is_primary":false,"text":[{"text":"}","highlight_start":1,"highlight_end":2}],"label":"temporary value is freed at the end of this statement","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"borrowed value must be valid for the static lifetime...","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"error[E0716]: temporary value dropped while borrowed\n --> /checkout/src/test/ui/consts/const-int-conversion.rs:16:28\n |\nLL | let y: &'static i32 = &(i32::from_be_bytes([0x12, 0x34, 0x56, 0x78]));\n | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use\n...\nLL | }\n | - temporary value is freed at the end of this statement\n |\n = note: borrowed value must be valid for the static lifetime...\n\n"}
[00:59:39] {"message":"temporary value dropped while borrowed","code":{"code":"E0716","explanation":"\nThis error indicates that a temporary value is being dropped\nwhile a borrow is still in active use.\n\nErroneous code example:\n\n```compile_fail,E0716\n# #![feature(nll)]\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet p = bar(&foo());\n // ------ creates a temporary\nlet q = *p;\n```\n\nHere, the expression `&foo()` is borrowing the expression\n`foo()`. As `foo()` is call to a function, and not the name of\na variable, this creates a **temporary** -- that temporary stores\nthe return value from `foo()` so that it can be borrowed.\nSo you might imagine that `let p = bar(&foo())` is equivalent\nto this:\n\n```compile_fail,E0597\n# fn foo() -> i32 { 22 }\n# fn bar(x: &i32) -> &i32 { x }\nlet p = {\n let tmp = foo(); // the temporary\n bar(&tmp)\n}; // <-- tmp is freed as we exit this block\nlet q = p;\n```\n\nWhenever a temporary is created, it is automatically dropped (freed)\naccording to fixed rules. Ordinarily, the temporary is dropped\nat the end of the enclosing statement -- in this case, after the `let`.\nThis is illustrated in the example above by showing that `tmp` would\nbe freed as we exit the block.\n\nTo fix this problem, you need to create a local variable\nto store the value in rather than relying on a temporary.\nFor example, you might change the original program to\nthe following:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = foo(); // dropped at the end of the enclosing block\nlet p = bar(&value);\nlet q = *p;\n```\n\nBy introducing the explicit `let value`, we allocate storage\nthat will last until the end of the enclosing block (when `value`\ngoes out of scope). When we borrow `&value`, we are borrowing a\nlocal variable that already exists, and hence no temporary is created.\n\nTemporaries are not always dropped at the end of the enclosing\nstatement. In simple cases where the `&` expression is immediately\nstored into a variable, the compiler will automatically extend\nthe lifetime of the temporary until the end of the enclosinb\nblock. Therefore, an alternative way to fix the original\nprogram is to write `let tmp = &foo()` and not `let tmp = foo()`:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = &foo();\nlet p = bar(value);\nlet q = *p;\n```\n\nHere, we are still borrowing `foo()`, but as the borrow is assigned\ndirectly into a variable, the temporary will not be dropped until\nthe end of the enclosing block. Similar rules apply when temporaries\nare stored into aggregate structures like a tuple or struct:\n\n```\n// Here, two temporaries are created, but\n// as they are stored directly into `value`,\n// they are not dropped until the end of the\n// enclosing block.\nfn foo() -> i32 { 22 }\nlet value = (&foo(), &foo());\n```\n"},"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/const-int-conversion.rs","byte_start":768,"byte_end":814,"line_start":18,"line_end":18,"column_start":28,"column_end":74,"is_primary":true,"text":[{"text":" let z: &'static i32 = &(i32::from_le_bytes([0x12, 0x34, 0x56, 0x78]));","highlight_start":28,"highlight_end":74}],"label":"creates a temporary which is freed while still in use","suggested_replacement":null,"suggestion_applicability":null,"expansion":null},{"file_name":"/checkout/src/test/ui/consts/const-int-conversion.rs","byte_start":1317,"byte_end":1318,"line_start":28,"line_end":28,"column_start":1,"column_end":2,"is_primary":false,"text":[{"text":"}","highlight_start":1,"highlight_end":2}],"label":"temporary value is freed at the end of this statement","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"borrowed value must be valid for the static lifetime...","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"error[E0716]: temporary value dropped while borrowed\n --> /checkout/src/test/ui/consts/const-int-conversion.rs:18:28\n |\nLL | let z: &'static i32 = &(i32::from_le_bytes([0x12, 0x34, 0x56, 0x78]));\n | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use\n...\nLL | }\n | - temporary value is freed at the end of this statement\n |\n = note: borrowed value must be valid for the static lifetime...\n\n"}
[00:59:39] {"message":"temporary value dropped while borrowed","code":{"code":"E0716","explanation":"\nThis error indicates that a temporary value is being dropped\nwhile a borrow is still in active use.\n\nErroneous code example:\n\n```compile_fail,E0716\n# #![feature(nll)]\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet p = bar(&foo());\n // ------ creates a temporary\nlet q = *p;\n```\n\nHere, the expression `&foo()` is borrowing the expression\n`foo()`. As `foo()` is call to a function, and not the name of\na variable, this creates a **temporary** -- that temporary stores\nthe return value from `foo()` so that it can be borrowed.\nSo you might imagine that `let p = bar(&foo())` is equivalent\nto this:\n\n```compile_fail,E0597\n# fn foo() -> i32 { 22 }\n# fn bar(x: &i32) -> &i32 { x }\nlet p = {\n let tmp = foo(); // the temporary\n bar(&tmp)\n}; // <-- tmp is freed as we exit this block\nlet q = p;\n```\n\nWhenever a temporary is created, it is automatically dropped (freed)\naccording to fixed rules. Ordinarily, the temporary is dropped\nat the end of the enclosing statement -- in this case, after the `let`.\nThis is illustrated in the example above by showing that `tmp` would\nbe freed as we exit the block.\n\nTo fix this problem, you need to create a local variable\nto store the value in rather than relying on a temporary.\nFor example, you might change the original program to\nthe following:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = foo(); // dropped at the end of the enclosing block\nlet p = bar(&value);\nlet q = *p;\n```\n\nBy introducing the explicit `let value`, we allocate storage\nthat will last until the end of the enclosing block (when `value`\ngoes out of scope). When we borrow `&value`, we are borrowing a\nlocal variable that already exists, and hence no temporary is created.\n\nTemporaries are not always dropped at the end of the enclosing\nstatement. In simple cases where the `&` expression is immediately\nstored into a variable, the compiler will automatically extend\nthe lifetime of the temporary until the end of the enclosinb\nblock. Therefore, an alternative way to fix the original\nprogram is to write `let tmp = &foo()` and not `let tmp = foo()`:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = &foo();\nlet p = bar(value);\nlet q = *p;\n```\n\nHere, we are still borrowing `foo()`, but as the borrow is assigned\ndirectly into a variable, the temporary will not be dropped until\nthe end of the enclosing block. Similar rules apply when temporaries\nare stored into aggregate structures like a tuple or struct:\n\n```\n// Here, two temporaries are created, but\n// as they are stored directly into `value`,\n// they are not dropped until the end of the\n// enclosing block.\nfn foo() -> i32 { 22 }\nlet value = (&foo(), &foo());\n```\n"},"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/const-int-conversion.rs","byte_start":888,"byte_end":939,"line_start":20,"line_end":20,"column_start":28,"column_end":79,"is_primary":true,"text":[{"text":" let a: &'static i32 = &(i32::from_be(i32::from_ne_bytes([0x80, 0, 0, 0])));","highlight_start":28,"highlight_end":79}],"label":"creates a temporary which is freed while still in use","suggested_replacement":null,"suggestion_applicability":null,"expansion":null},{"file_name":"/checkout/src/test/ui/consts/const-int-conversion.rs","byte_start":1317,"byte_end":1318,"line_start":28,"line_end":28,"column_start":1,"column_end":2,"is_primary":false,"text":[{"text":"}","highlight_start":1,"highlight_end":2}],"label":"temporary value is freed at the end of this statement","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"borrowed value must be valid for the static lifetime...","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"error[E0716]: temporary value dropped while borrowed\n --> /checkout/src/test/ui/consts/const-int-conversion.rs:20:28\n |\nLL | let a: &'static i32 = &(i32::from_be(i32::from_ne_bytes([0x80, 0, 0, 0])));\n | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use\n...\nLL | }\n | - temporary value is freed at the end of this statement\n |\n = note: borrowed value must be valid for the static lifetime...\n\n"}
[00:59:39] {"message":"temporary value dropped while borrowed","code":{"code":"E0716","explanation":"\nThis error indicates that a temporary value is being dropped\nwhile a borrow is still in active use.\n\nErroneous code example:\n\n```compile_fail,E0716\n# #![feature(nll)]\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet p = bar(&foo());\n // ------ creates a temporary\nlet q = *p;\n```\n\nHere, the expression `&foo()` is borrowing the expression\n`foo()`. As `foo()` is call to a function, and not the name of\na variable, this creates a **temporary** -- that temporary stores\nthe return value from `foo()` so that it can be borrowed.\nSo you might imagine that `let p = bar(&foo())` is equivalent\nto this:\n\n```compile_fail,E0597\n# fn foo() -> i32 { 22 }\n# fn bar(x: &i32) -> &i32 { x }\nlet p = {\n let tmp = foo(); // the temporary\n bar(&tmp)\n}; // <-- tmp is freed as we exit this block\nlet q = p;\n```\n\nWhenever a temporary is created, it is automatically dropped (freed)\naccording to fixed rules. Ordinarily, the temporary is dropped\nat the end of the enclosing statement -- in this case, after the `let`.\nThis is illustrated in the example above by showing that `tmp` would\nbe freed as we exit the block.\n\nTo fix this problem, you need to create a local variable\nto store the value in rather than relying on a temporary.\nFor example, you might change the original program to\nthe following:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = foo(); // dropped at the end of the enclosing block\nlet p = bar(&value);\nlet q = *p;\n```\n\nBy introducing the explicit `let value`, we allocate storage\nthat will last until the end of the enclosing block (when `value`\ngoes out of scope). When we borrow `&value`, we are borrowing a\nlocal variable that already exists, and hence no temporary is created.\n\nTemporaries are not always dropped at the end of the enclosing\nstatement. In simple cases where the `&` expression is immediately\nstored into a variable, the compiler will automatically extend\nthe lifetime of the temporary until the end of the enclosinb\nblock. Therefore, an alternative way to fix the original\nprogram is to write `let tmp = &foo()` and not `let tmp = foo()`:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = &foo();\nlet p = bar(value);\nlet q = *p;\n```\n\nHere, we are still borrowing `foo()`, but as the borrow is assigned\ndirectly into a variable, the temporary will not be dropped until\nthe end of the enclosing block. Similar rules apply when temporaries\nare stored into aggregate structures like a tuple or struct:\n\n```\n// Here, two temporaries are created, but\n// as they are stored directly into `value`,\n// they are not dropped until the end of the\n// enclosing block.\nfn foo() -> i32 { 22 }\nlet value = (&foo(), &foo());\n```\n"},"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/const-int-conversion.rs","byte_start":1014,"byte_end":1047,"line_start":22,"line_end":22,"column_start":29,"column_end":62,"is_primary":true,"text":[{"text":" let b: &'static [u8] = &(0x12_34_56_78_i32.to_be_bytes());","highlight_start":29,"highlight_end":62}],"label":"creates a temporary which is freed while still in use","suggested_replacement":null,"suggestion_applicability":null,"expansion":null},{"file_name":"/checkout/src/test/ui/consts/const-int-conversion.rs","byte_start":1317,"byte_end":1318,"line_start":28,"line_end":28,"column_start":1,"column_end":2,"is_primary":false,"text":[{"text":"}","highlight_start":1,"highlight_end":2}],"label":"temporary value is freed at the end of this statement","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"borrowed value must be valid for the static lifetime...","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"error[E0716]: temporary value dropped while borrowed\n --> /checkout/src/test/ui/consts/const-int-conversion.rs:22:29\n |\nLL | let b: &'static [u8] = &(0x12_34_56_78_i32.to_be_bytes());\n | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use\n...\nLL | }\n | - temporary value is freed at the end of this statement\n |\n = note: borrowed value must be valid for the static lifetime...\n\n"}
[00:59:39] {"message":"temporary value dropped while borrowed","code":{"code":"E0716","explanation":"\nThis error indicates that a temporary value is being dropped\nwhile a borrow is still in active use.\n\nErroneous code example:\n\n```compile_fail,E0716\n# #![feature(nll)]\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet p = bar(&foo());\n // ------ creates a temporary\nlet q = *p;\n```\n\nHere, the expression `&foo()` is borrowing the expression\n`foo()`. As `foo()` is call to a function, and not the name of\na variable, this creates a **temporary** -- that temporary stores\nthe return value from `foo()` so that it can be borrowed.\nSo you might imagine that `let p = bar(&foo())` is equivalent\nto this:\n\n```compile_fail,E0597\n# fn foo() -> i32 { 22 }\n# fn bar(x: &i32) -> &i32 { x }\nlet p = {\n let tmp = foo(); // the temporary\n bar(&tmp)\n}; // <-- tmp is freed as we exit this block\nlet q = p;\n```\n\nWhenever a temporary is created, it is automatically dropped (freed)\naccording to fixed rules. Ordinarily, the temporary is dropped\nat the end of the enclosing statement -- in this case, after the `let`.\nThis is illustrated in the example above by showing that `tmp` would\nbe freed as we exit the block.\n\nTo fix this problem, you need to create a local variable\nto store the value in rather than relying on a temporary.\nFor example, you might change the original program to\nthe following:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = foo(); // dropped at the end of the enclosing block\nlet p = bar(&value);\nlet q = *p;\n```\n\nBy introducing the explicit `let value`, we allocate storage\nthat will last until the end of the enclosing block (when `value`\ngoes out of scope). When we borrow `&value`, we are borrowing a\nlocal variable that already exists, and hence no temporary is created.\n\nTemporaries are not always dropped at the end of the enclosing\nstatement. In simple cases where the `&` expression is immediately\nstored into a variable, the compiler will automatically extend\nthe lifetime of the temporary until the end of the enclosinb\nblock. Therefore, an alternative way to fix the original\nprogram is to write `let tmp = &foo()` and not `let tmp = foo()`:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = &foo();\nlet p = bar(value);\nlet q = *p;\n```\n\nHere, we are still borrowing `foo()`, but as the borrow is assigned\ndirectly into a variable, the temporary will not be dropped until\nthe end of the enclosing block. Similar rules apply when temporaries\nare stored into aggregate structures like a tuple or struct:\n\n```\n// Here, two temporaries are created, but\n// as they are stored directly into `value`,\n// they are not dropped until the end of the\n// enclosing block.\nfn foo() -> i32 { 22 }\nlet value = (&foo(), &foo());\n```\n"},"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/const-int-conversion.rs","byte_start":1122,"byte_end":1155,"line_start":24,"line_end":24,"column_start":29,"column_end":62,"is_primary":true,"text":[{"text":" let c: &'static [u8] = &(0x12_34_56_78_i32.to_le_bytes());","highlight_start":29,"highlight_end":62}],"label":"creates a temporary which is freed while still in use","suggested_replacement":null,"suggestion_applicability":null,"expansion":null},{"file_name":"/checkout/src/test/ui/consts/const-int-conversion.rs","byte_start":1317,"byte_end":1318,"line_start":28,"line_end":28,"column_start":1,"column_end":2,"is_primary":false,"text":[{"text":"}","highlight_start":1,"highlight_end":2}],"label":"temporary value is freed at the end of this statement","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"borrowed value must be valid for the static lifetime...","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"error[E0716]: temporary value dropped while borrowed\n --> /checkout/src/test/ui/consts/const-int-conversion.rs:24:29\n |\nLL | let c: &'static [u8] = &(0x12_34_56_78_i32.to_le_bytes());\n | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use\n...\nLL | }\n | - temporary value is freed at the end of this statement\n |\n = note: borrowed value must be valid for the static lifetime...\n\n"}
[00:59:39] {"message":"temporary value dropped while borrowed","code":{"code":"E0716","explanation":"\nThis error indicates that a temporary value is being dropped\nwhile a borrow is still in active use.\n\nErroneous code example:\n\n```compile_fail,E0716\n# #![feature(nll)]\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet p = bar(&foo());\n // ------ creates a temporary\nlet q = *p;\n```\n\nHere, the expression `&foo()` is borrowing the expression\n`foo()`. As `foo()` is call to a function, and not the name of\na variable, this creates a **temporary** -- that temporary stores\nthe return value from `foo()` so that it can be borrowed.\nSo you might imagine that `let p = bar(&foo())` is equivalent\nto this:\n\n```compile_fail,E0597\n# fn foo() -> i32 { 22 }\n# fn bar(x: &i32) -> &i32 { x }\nlet p = {\n let tmp = foo(); // the temporary\n bar(&tmp)\n}; // <-- tmp is freed as we exit this block\nlet q = p;\n```\n\nWhenever a temporary is created, it is automatically dropped (freed)\naccording to fixed rules. Ordinarily, the temporary is dropped\nat the end of the enclosing statement -- in this case, after the `let`.\nThis is illustrated in the example above by showing that `tmp` would\nbe freed as we exit the block.\n\nTo fix this problem, you need to create a local variable\nto store the value in rather than relying on a temporary.\nFor example, you might change the original program to\nthe following:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = foo(); // dropped at the end of the enclosing block\nlet p = bar(&value);\nlet q = *p;\n```\n\nBy introducing the explicit `let value`, we allocate storage\nthat will last until the end of the enclosing block (when `value`\ngoes out of scope). When we borrow `&value`, we are borrowing a\nlocal variable that already exists, and hence no temporary is created.\n\nTemporaries are not always dropped at the end of the enclosing\nstatement. In simple cases where the `&` expression is immediately\nstored into a variable, the compiler will automatically extend\nthe lifetime of the temporary until the end of the enclosinb\nblock. Therefore, an alternative way to fix the original\nprogram is to write `let tmp = &foo()` and not `let tmp = foo()`:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = &foo();\nlet p = bar(value);\nlet q = *p;\n```\n\nHere, we are still borrowing `foo()`, but as the borrow is assigned\ndirectly into a variable, the temporary will not be dropped until\nthe end of the enclosing block. Similar rules apply when temporaries\nare stored into aggregate structures like a tuple or struct:\n\n```\n// Here, two temporaries are created, but\n// as they are stored directly into `value`,\n// they are not dropped until the end of the\n// enclosing block.\nfn foo() -> i32 { 22 }\nlet value = (&foo(), &foo());\n```\n"},"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/const-int-conversion.rs","byte_start":1230,"byte_end":1270,"line_start":26,"line_end":26,"column_start":29,"column_end":69,"is_primary":true,"text":[{"text":" let d: &'static [u8] = &(i32::min_value().to_be().to_ne_bytes());","highlight_start":29,"highlight_end":69}],"label":"creates a temporary which is freed while still in use","suggested_replacement":null,"suggestion_applicability":null,"expansion":null},{"file_name":"/checkout/src/test/ui/consts/const-int-conversion.rs","byte_start":1317,"byte_end":1318,"line_start":28,"line_end":28,"column_start":1,"column_end":2,"is_primary":false,"text":[{"text":"}","highlight_start":1,"highlight_end":2}],"label":"temporary value is freed at the end of this statement","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"borrowed value must be valid for the static lifetime...","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"error[E0716]: temporary value dropped while borrowed\n --> /checkout/src/test/ui/consts/const-int-conversion.rs:26:29\n |\nLL | let d: &'static [u8] = &(i32::min_value().to_be().to_ne_bytes());\n | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use\nLL | //~^ ERROR does not live long enough\nLL | }\n | - temporary value is freed at the end of this statement\n |\n = note: borrowed value must be valid for the static lifetime...\n\n"}
[00:59:39] {"message":"aborting due to 7 previous errors","code":null,"level":"error","spans":[],"children":[],"rendered":"error: aborting due to 7 previous errors\n\n"}
[00:59:39] {"message":"For more information about this error, try `rustc --explain E0716`.","code":null,"level":"","spans":[],"children":[],"rendered":"For more information about this error, try `rustc --explain E0716`.\n"}
[00:59:39] ------------------------------------------
[00:59:39] [00:59:39] thread '[ui (nll)] ui/consts/const-int-conversion.rs' panicked at 'explicit panic', tools/compiletest/src/runtest.rs:3238:9
[00:59:39] [00:59:39] [00:59:39] ---- [ui (nll)] ui/consts/const-int-overflowing.rs stdout ----
[00:59:39] diff of stderr:
[00:59:39] [00:59:39] - error[E0714]: temporary value dropped while borrowed
[00:59:39] + error[E0716]: temporary value dropped while borrowed
[00:59:39] 3 |
[00:59:39] 3 |
[00:59:39] 4 LL | let x: &'static (i32, bool) = &(5_i32.overflowing_add(3)); //~ ERROR does not live long enough
[00:59:39] 9 |
[00:59:39] 9 |
[00:59:39] 10 = note: borrowed value must be valid for the static lifetime...
[00:59:39] 11 [00:59:39] - error[E0714]: temporary value dropped while borrowed
[00:59:39] + error[E0716]: temporary value dropped while borrowed
[00:59:39] 14 |
[00:59:39] 14 |
[00:59:39] 15 LL | let y: &'static (i32, bool) = &(5_i32.overflowing_sub(3)); //~ ERROR does not live long enough
[00:59:39] 20 |
[00:59:39] 20 |
[00:59:39] 21 = note: borrowed value must be valid for the static lifetime...
[00:59:39] 22 [00:59:39] - error[E0714]: temporary value dropped while borrowed
[00:59:39] + error[E0716]: temporary value dropped while borrowed
[00:59:39] 25 |
[00:59:39] 25 |
[00:59:39] 26 LL | let z: &'static (i32, bool) = &(5_i32.overflowing_mul(3)); //~ ERROR does not live long enough
[00:59:39] 32 [00:59:39] 33 error: aborting due to 3 previous errors
[00:59:39] 34 [00:59:39] - For more information about this error, try `rustc --explain E0714`.
[00:59:39] - For more information about this error, try `rustc --explain E0714`.
[00:59:39] + For more information about this error, try `rustc --explain E0716`.
[00:59:39] 36 [00:59:39] [00:59:39] [00:59:39] The actual stderr differed from the expected stderr.
[00:59:39] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/consts/const-int-overflowing.nll/const-int-overflowing.nll.stderr
[00:59:39] To update references, rerun the tests and pass the `--bless` flag
[00:59:39] To only update this specific test, also pass `--test-args consts/const-int-overflowing.rs`
[00:59:39] error: 1 errors occurred comparing output.
[00:59:39] status: exit code: 1
[00:59:39] status: exit code: 1
[00:59:39] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/ui/consts/const-int-overflowing.rs" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/consts/const-int-overflowing.nll/a" "-Zborrowck=mir" "-Ztwo-phase-borrows" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/consts/const-int-overflowing.nll/auxiliary" "-A" "unused"
[00:59:39] ------------------------------------------
[00:59:39] [00:59:39] ------------------------------------------
[00:59:39] stderr:
[00:59:39] stderr:
[00:59:39] ------------------------------------------
[00:59:39] {"message":"temporary value dropped while borrowed","code":{"code":"E0716","explanation":"\nThis error indicates that a temporary value is being dropped\nwhile a borrow is still in active use.\n\nErroneous code example:\n\n```compile_fail,E0716\n# #![feature(nll)]\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet p = bar(&foo());\n // ------ creates a temporary\nlet q = *p;\n```\n\nHere, the expression `&foo()` is borrowing the expression\n`foo()`. As `foo()` is call to a function, and not the name of\na variable, this creates a **temporary** -- that temporary stores\nthe return value from `foo()` so that it can be borrowed.\nSo you might imagine that `let p = bar(&foo())` is equivalent\nto this:\n\n```compile_fail,E0597\n# fn foo() -> i32 { 22 }\n# fn bar(x: &i32) -> &i32 { x }\nlet p = {\n let tmp = foo(); // the temporary\n bar(&tmp)\n}; // <-- tmp is freed as we exit this block\nlet q = p;\n```\n\nWhenever a temporary is created, it is automatically dropped (freed)\naccording to fixed rules. Ordinarily, the temporary is dropped\nat the end of the enclosing statement -- in this case, after the `let`.\nThis is illustrated in the example above by showing that `tmp` would\nbe freed as we exit the block.\n\nTo fix this problem, you need to create a local variable\nto store the value in rather than relying on a temporary.\nFor example, you might change the original program to\nthe following:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = foo(); // dropped at the end of the enclosing block\nlet p = bar(&value);\nlet q = *p;\n```\n\nBy introducing the explicit `let value`, we allocate storage\nthat will last until the end of the enclosing block (when `value`\ngoes out of scope). When we borrow `&value`, we are borrowing a\nlocal variable that already exists, and hence no temporary is created.\n\nTemporaries are not always dropped at the end of the enclosing\nstatement. In simple cases where the `&` expression is immediately\nstored into a variable, the compiler will automatically extend\nthe lifetime of the temporary until the end of the enclosinb\nblock. Therefore, an alternative way to fix the original\nprogram is to write `let tmp = &foo()` and not `let tmp = foo()`:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = &foo();\nlet p = bar(value);\nlet q = *p;\n```\n\nHere, we are still borrowing `foo()`, but as the borrow is assigned\ndirectly into a variable, the temporary will not be dropped until\nthe end of the enclosing block. Similar rules apply when temporaries\nare stored into aggregate structures like a tuple or struct:\n\n```\n// Here, two temporaries are created, but\n// as they are stored directly into `value`,\n// they are not dropped until the end of the\n// enclosing block.\nfn foo() -> i32 { 22 }\nlet value = (&foo(), &foo());\n```\n"},"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/const-int-overflowing.rs","byte_start":514,"byte_end":540,"line_start":12,"line_end":12,"column_start":36,"column_end":62,"is_primary":true,"text":[{"text":" let x: &'static (i32, bool) = &(5_i32.overflowing_add(3)); //~ ERROR does not live long enough","highlight_start":36,"highlight_end":62}],"label":"creates a temporary which is freed while still in use","suggested_replacement":null,"suggestion_applicability":null,"expansion":null},{"file_name":"/checkout/src/test/ui/consts/const-int-overflowing.rs","byte_start":776,"byte_end":777,"line_start":15,"line_end":15,"column_start":1,"column_end":2,"is_primary":false,"text":[{"text":"}","highlight_start":1,"highlight_end":2}],"label":"temporary value is freed at the end of this statement","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"borrowed value must be valid for the static lifetime...","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"error[E0716]: temporary value dropped while borrowed\n --> /checkout/src/test/ui/consts/const-int-overflowing.rs:12:36\n |\nLL | let x: &'static (i32, bool) = &(5_i32.overflowing_add(3)); //~ ERROR does not live long enough\n | ^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use\n...\nLL | }\n | - temporary value is freed at the end of this statement\n |\n = note: borrowed value must be valid for the static lifetime...\n\n"}
[00:59:39] {"message":"temporary value dropped while borrowed","code":{"code":"E0716","explanation":"\nThis error indicates that a temporary value is being dropped\nwhile a borrow is still in active use.\n\nErroneous code example:\n\n```compile_fail,E0716\n# #![feature(nll)]\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet p = bar(&foo());\n // ------ creates a temporary\nlet q = *p;\n```\n\nHere, the expression `&foo()` is borrowing the expression\n`foo()`. As `foo()` is call to a function, and not the name of\na variable, this creates a **temporary** -- that temporary stores\nthe return value from `foo()` so that it can be borrowed.\nSo you might imagine that `let p = bar(&foo())` is equivalent\nto this:\n\n```compile_fail,E0597\n# fn foo() -> i32 { 22 }\n# fn bar(x: &i32) -> &i32 { x }\nlet p = {\n let tmp = foo(); // the temporary\n bar(&tmp)\n}; // <-- tmp is freed as we exit this block\nlet q = p;\n```\n\nWhenever a temporary is created, it is automatically dropped (freed)\naccording to fixed rules. Ordinarily, the temporary is dropped\nat the end of the enclosing statement -- in this case, after the `let`.\nThis is illustrated in the example above by showing that `tmp` would\nbe freed as we exit the block.\n\nTo fix this problem, you need to create a local variable\nto store the value in rather than relying on a temporary.\nFor example, you might change the original program to\nthe following:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = foo(); // dropped at the end of the enclosing block\nlet p = bar(&value);\nlet q = *p;\n```\n\nBy introducing the explicit `let value`, we allocate storage\nthat will last until the end of the enclosing block (when `value`\ngoes out of scope). When we borrow `&value`, we are borrowing a\nlocal variable that already exists, and hence no temporary is created.\n\nTemporaries are not always dropped at the end of the enclosing\nstatement. In simple cases where the `&` expression is immediately\nstored into a variable, the compiler will automatically extend\nthe lifetime of the temporary until the end of the enclosinb\nblock. Therefore, an alternative way to fix the original\nprogram is to write `let tmp = &foo()` and not `let tmp = foo()`:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = &foo();\nlet p = bar(value);\nlet q = *p;\n```\n\nHere, we are still borrowing `foo()`, but as the borrow is assigned\ndirectly into a variable, the temporary will not be dropped until\nthe end of the enclosing block. Similar rules apply when temporaries\nare stored into aggregate structures like a tuple or struct:\n\n```\n// Here, two temporaries are created, but\n// as they are stored directly into `value`,\n// they are not dropped until the end of the\n// enclosing block.\nfn foo() -> i32 { 22 }\nlet value = (&foo(), &foo());\n```\n"},"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/const-int-overflowing.rs","byte_start":613,"byte_end":639,"line_start":13,"line_end":13,"column_start":36,"column_end":62,"is_primary":true,"text":[{"text":" let y: &'static (i32, bool) = &(5_i32.overflowing_sub(3)); //~ ERROR does not live long enough","highlight_start":36,"highlight_end":62}],"label":"creates a temporary which is freed while still in use","suggested_replacement":null,"suggestion_applicability":null,"expansion":null},{"file_name":"/checkout/src/test/ui/consts/const-int-overflowing.rs","byte_start":776,"byte_end":777,"line_start":15,"line_end":15,"column_start":1,"column_end":2,"is_primary":false,"text":[{"text":"}","highlight_start":1,"highlight_end":2}],"label":"temporary value is freed at the end of this statement","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"borrowed value must be valid for the static lifetime...","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"error[E0716]: temporary value dropped while borrowed\n --> /checkout/src/test/ui/consts/const-int-overflowing.rs:13:36\n |\nLL | let y: &'static (i32, bool) = &(5_i32.overflowing_sub(3)); //~ ERROR does not live long enough\n | ^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use\nLL | let z: &'static (i32, bool) = &(5_i32.overflowing_mul(3)); //~ ERROR does not live long enough\nLL | }\n | - temporary value is freed at the end of this statement\n |\n = note: borrowed value must be valid for the static lifetime...\n\n"}
[00:59:39] {"message":"temporary value dropped while borrowed","code":{"code":"E0716","explanation":"\nThis error indicates that a temporary value is being dropped\nwhile a borrow is still in active use.\n\nErroneous code example:\n\n```compile_fail,E0716\n# #![feature(nll)]\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet p = bar(&foo());\n // ------ creates a temporary\nlet q = *p;\n```\n\nHere, the expression `&foo()` is borrowing the expression\n`foo()`. As `foo()` is call to a function, and not the name of\na variable, this creates a **temporary** -- that temporary stores\nthe return value from `foo()` so that it can be borrowed.\nSo you might imagine that `let p = bar(&foo())` is equivalent\nto this:\n\n```compile_fail,E0597\n# fn foo() -> i32 { 22 }\n# fn bar(x: &i32) -> &i32 { x }\nlet p = {\n let tmp = foo(); // the temporary\n bar(&tmp)\n}; // <-- tmp is freed as we exit this block\nlet q = p;\n```\n\nWhenever a temporary is created, it is automatically dropped (freed)\naccording to fixed rules. Ordinarily, the temporary is dropped\nat the end of the enclosing statement -- in this case, after the `let`.\nThis is illustrated in the example above by showing that `tmp` would\nbe freed as we exit the block.\n\nTo fix this problem, you need to create a local variable\nto store the value in rather than relying on a temporary.\nFor example, you might change the original program to\nthe following:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = foo(); // dropped at the end of the enclosing block\nlet p = bar(&value);\nlet q = *p;\n```\n\nBy introducing the explicit `let value`, we allocate storage\nthat will last until the end of the enclosing block (when `value`\ngoes out of scope). When we borrow `&value`, we are borrowing a\nlocal variable that already exists, and hence no temporary is created.\n\nTemporaries are not always dropped at the end of the enclosing\nstatement. In simple cases where the `&` expression is immediately\nstored into a variable, the compiler will automatically extend\nthe lifetime of the temporary until the end of the enclosinb\nblock. Therefore, an alternative way to fix the original\nprogram is to write `let tmp = &foo()` and not `let tmp = foo()`:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = &foo();\nlet p = bar(value);\nlet q = *p;\n```\n\nHere, we are still borrowing `foo()`, but as the borrow is assigned\ndirectly into a variable, the temporary will not be dropped until\nthe end of the enclosing block. Similar rules apply when temporaries\nare stored into aggregate structures like a tuple or struct:\n\n```\n// Here, two temporaries are created, but\n// as they are stored directly into `value`,\n// they are not dropped until the end of the\n// enclosing block.\nfn foo() -> i32 { 22 }\nlet value = (&foo(), &foo());\n```\n"},"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/const-int-overflowing.rs","byte_start":712,"byte_end":738,"line_start":14,"line_end":14,"column_start":36,"column_end":62,"is_primary":true,"text":[{"text":" let z: &'static (i32, bool) = &(5_i32.overflowing_mul(3)); //~ ERROR does not live long enough","highlight_start":36,"highlight_end":62}],"label":"creates a temporary which is freed while still in use","suggested_replacement":null,"suggestion_applicability":null,"expansion":null},{"file_name":"/checkout/src/test/ui/consts/const-int-overflowing.rs","byte_start":776,"byte_end":777,"line_start":15,"line_end":15,"column_start":1,"column_end":2,"is_primary":false,"text":[{"text":"}","highlight_start":1,"highlight_end":2}],"label":"temporary value is freed at the end of this statement","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"borrowed value must be valid for the static lifetime...","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"error[E0716]: temporary value dropped while borrowed\n --> /checkout/src/test/ui/consts/const-int-overflowing.rs:14:36\n |\nLL | let z: &'static (i32, bool) = &(5_i32.overflowing_mul(3)); //~ ERROR does not live long enough\n | ^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use\nLL | }\n | - temporary value is freed at the end of this statement\n |\n = note: borrowed value must be valid for the static lifetime...\n\n"}
[00:59:39] {"message":"aborting due to 3 previous errors","code":null,"level":"error","spans":[],"children":[],"rendered":"error: aborting due to 3 previous errors\n\n"}
[00:59:39] {"message":"For more information about this error, try `rustc --explain E0716`.","code":null,"level":"","spans":[],"children":[],"rendered":"For more information about this error, try `rustc --explain E0716`.\n"}
[00:59:39] ------------------------------------------
[00:59:39] [00:59:39] thread '[ui (nll)] ui/consts/const-int-overflowing.rs' panicked at 'explicit panic', tools/compiletest/src/runtest.rs:3238:9
[00:59:39] [00:59:39] [00:59:39] ---- [ui (nll)] ui/consts/const-int-rotate.rs stdout ----
[00:59:39] diff of stderr:
[00:59:39] [00:59:39] - error[E0714]: temporary value dropped while borrowed
[00:59:39] + error[E0716]: temporary value dropped while borrowed
[00:59:39] 3 |
[00:59:39] 3 |
[00:59:39] 4 LL | let x: &'static i32 = &(5_i32.rotate_left(3)); //~ ERROR does not live long enough
[00:59:39] 9 |
[00:59:39] 9 |
[00:59:39] 10 = note: borrowed value must be valid for the static lifetime...
[00:59:39] 11 [00:59:39] - error[E0714]: temporary value dropped while borrowed
[00:59:39] + error[E0716]: temporary value dropped while borrowed
[00:59:39] 14 |
[00:59:39] 14 |
[00:59:39] 15 LL | let y: &'static i32 = &(5_i32.rotate_right(3)); //~ ERROR does not live long enough
[00:59:39] 21 [00:59:39] 22 error: aborting due to 2 previous errors
[00:59:39] 23 [00:59:39] - For more information about this error, try `rustc --explain E0714`.
[00:59:39] - For more information about this error, try `rustc --explain E0714`.
[00:59:39] + For more information about this error, try `rustc --explain E0716`.
[00:59:39] 25 [00:59:39] [00:59:39] [00:59:39] The actual stderr differed from the expected stderr.
[00:59:39] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/consts/const-int-rotate.nll/const-int-rotate.nll.stderr
[00:59:39] To update references, rerun the tests and pass the `--bless` flag
[00:59:39] To only update this specific test, also pass `--test-args consts/const-int-rotate.rs`
[00:59:39] error: 1 errors occurred comparing output.
[00:59:39] status: exit code: 1
[00:59:39] status: exit code: 1
[00:59:39] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/ui/consts/const-int-rotate.rs" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/consts/const-int-rotate.nll/a" "-Zborrowck=mir" "-Ztwo-phase-borrows" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/consts/const-int-rotate.nll/auxiliary" "-A" "unused"
[00:59:39] ------------------------------------------
[00:59:39] [00:59:39] ------------------------------------------
[00:59:39] stderr:
[00:59:39] stderr:
[00:59:39] ------------------------------------------
[00:59:39] {"message":"temporary value dropped while borrowed","code":{"code":"E0716","explanation":"\nThis error indicates that a temporary value is being dropped\nwhile a borrow is still in active use.\n\nErroneous code example:\n\n```compile_fail,E0716\n# #![feature(nll)]\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet p = bar(&foo());\n // ------ creates a temporary\nlet q = *p;\n```\n\nHere, the expression `&foo()` is borrowing the expression\n`foo()`. As `foo()` is call to a function, and not the name of\na variable, this creates a **temporary** -- that temporary stores\nthe return value from `foo()` so that it can be borrowed.\nSo you might imagine that `let p = bar(&foo())` is equivalent\nto this:\n\n```compile_fail,E0597\n# fn foo() -> i32 { 22 }\n# fn bar(x: &i32) -> &i32 { x }\nlet p = {\n let tmp = foo(); // the temporary\n bar(&tmp)\n}; // <-- tmp is freed as we exit this block\nlet q = p;\n```\n\nWhenever a temporary is created, it is automatically dropped (freed)\naccording to fixed rules. Ordinarily, the temporary is dropped\nat the end of the enclosing statement -- in this case, after the `let`.\nThis is illustrated in the example above by showing that `tmp` would\nbe freed as we exit the block.\n\nTo fix this problem, you need to create a local variable\nto store the value in rather than relying on a temporary.\nFor example, you might change the original program to\nthe following:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = foo(); // dropped at the end of the enclosing block\nlet p = bar(&value);\nlet q = *p;\n```\n\nBy introducing the explicit `let value`, we allocate storage\nthat will last until the end of the enclosing block (when `value`\ngoes out of scope). When we borrow `&value`, we are borrowing a\nlocal variable that already exists, and hence no temporary is created.\n\nTemporaries are not always dropped at the end of the enclosing\nstatement. In simple cases where the `&` expression is immediately\nstored into a variable, the compiler will automatically extend\nthe lifetime of the temporary until the end of the enclosinb\nblock. Therefore, an alternative way to fix the original\nprogram is to write `let tmp = &foo()` and not `let tmp = foo()`:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = &foo();\nlet p = bar(value);\nlet q = *p;\n```\n\nHere, we are still borrowing `foo()`, but as the borrow is assigned\ndirectly into a variable, the temporary will not be dropped until\nthe end of the enclosing block. Similar rules apply when temporaries\nare stored into aggregate structures like a tuple or struct:\n\n```\n// Here, two temporaries are created, but\n// as they are stored directly into `value`,\n// they are not dropped until the end of the\n// enclosing block.\nfn foo() -> i32 { 22 }\nlet value = (&foo(), &foo());\n```\n"},"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/const-int-rotate.rs","byte_start":506,"byte_end":528,"line_start":12,"line_end":12,"column_start":28,"column_end":50,"is_primary":true,"text":[{"text":" let x: &'static i32 = &(5_i32.rotate_left(3)); //~ ERROR does not live long enough","highlight_start":28,"highlight_end":50}],"label":"creates a temporary which is freed while still in use","suggested_replacement":null,"suggestion_applicability":null,"expansion":null},{"file_name":"/checkout/src/test/ui/consts/const-int-rotate.rs","byte_start":654,"byte_end":655,"line_start":14,"line_end":14,"column_start":1,"column_end":2,"is_primary":false,"text":[{"text":"}","highlight_start":1,"highlight_end":2}],"label":"temporary value is freed at the end of this statement","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"borrowed value must be valid for the static lifetime...","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"error[E0716]: temporary value dropped while borrowed\n --> /checkout/src/test/ui/consts/const-int-rotate.rs:12:28\n |\nLL | let x: &'static i32 = &(5_i32.rotate_left(3)); //~ ERROR does not live long enough\n | ^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use\nLL | let y: &'static i32 = &(5_i32.rotate_right(3)); //~ ERROR does not live long enough\nLL | }\n | - temporary value is freed at the end of this statement\n |\n = note: borrowed value must be valid for the static lifetime...\n\n"}
[00:59:39] {"message":"temporary value dropped while borrowed","code":{"code":"E0716","explanation":"\nThis error indicates that a temporary value is being dropped\nwhile a borrow is still in active use.\n\nErroneous code example:\n\n```compile_fail,E0716\n# #![feature(nll)]\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet p = bar(&foo());\n // ------ creates a temporary\nlet q = *p;\n```\n\nHere, the expression `&foo()` is borrowing the expression\n`foo()`. As `foo()` is call to a function, and not the name of\na variable, this creates a **temporary** -- that temporary stores\nthe return value from `foo()` so that it can be borrowed.\nSo you might imagine that `let p = bar(&foo())` is equivalent\nto this:\n\n```compile_fail,E0597\n# fn foo() -> i32 { 22 }\n# fn bar(x: &i32) -> &i32 { x }\nlet p = {\n let tmp = foo(); // the temporary\n bar(&tmp)\n}; // <-- tmp is freed as we exit this block\nlet q = p;\n```\n\nWhenever a temporary is created, it is automatically dropped (freed)\naccording to fixed rules. Ordinarily, the temporary is dropped\nat the end of the enclosing statement -- in this case, after the `let`.\nThis is illustrated in the example above by showing that `tmp` would\nbe freed as we exit the block.\n\nTo fix this problem, you need to create a local variable\nto store the value in rather than relying on a temporary.\nFor example, you might change the original program to\nthe following:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = foo(); // dropped at the end of the enclosing block\nlet p = bar(&value);\nlet q = *p;\n```\n\nBy introducing the explicit `let value`, we allocate storage\nthat will last until the end of the enclosing block (when `value`\ngoes out of scope). When we borrow `&value`, we are borrowing a\nlocal variable that already exists, and hence no temporary is created.\n\nTemporaries are not always dropped at the end of the enclosing\nstatement. In simple cases where the `&` expression is immediately\nstored into a variable, the compiler will automatically extend\nthe lifetime of the temporary until the end of the enclosinb\nblock. Therefore, an alternative way to fix the original\nprogram is to write `let tmp = &foo()` and not `let tmp = foo()`:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = &foo();\nlet p = bar(value);\nlet q = *p;\n```\n\nHere, we are still borrowing `foo()`, but as the borrow is assigned\ndirectly into a variable, the temporary will not be dropped until\nthe end of the enclosing block. Similar rules apply when temporaries\nare stored into aggregate structures like a tuple or struct:\n\n```\n// Here, two temporaries are created, but\n// as they are stored directly into `value`,\n// they are not dropped until the end of the\n// enclosing block.\nfn foo() -> i32 { 22 }\nlet value = (&foo(), &foo());\n```\n"},"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/const-int-rotate.rs","byte_start":593,"byte_end":616,"line_start":13,"line_end":13,"column_start":28,"column_end":51,"is_primary":true,"text":[{"text":" let y: &'static i32 = &(5_i32.rotate_right(3)); //~ ERROR does not live long enough","highlight_start":28,"highlight_end":51}],"label":"creates a temporary which is freed while still in use","suggested_replacement":null,"suggestion_applicability":null,"expansion":null},{"file_name":"/checkout/src/test/ui/consts/const-int-rotate.rs","byte_start":654,"byte_end":655,"line_start":14,"line_end":14,"column_start":1,"column_end":2,"is_primary":false,"text":[{"text":"}","highlight_start":1,"highlight_end":2}],"label":"temporary value is freed at the end of this statement","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"borrowed value must be valid for the static lifetime...","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"error[E0716]: temporary value dropped while borrowed\n --> /checkout/src/test/ui/consts/const-int-rotate.rs:13:28\n |\nLL | let y: &'static i32 = &(5_i32.rotate_right(3)); //~ ERROR does not live long enough\n | ^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use\nLL | }\n | - temporary value is freed at the end of this statement\n |\n = note: borrowed value must be valid for the static lifetime...\n\n"}
[00:59:39] {"message":"aborting due to 2 previous errors","code":null,"level":"error","spans":[],"children":[],"rendered":"error: aborting due to 2 previous errors\n\n"}
[00:59:39] {"message":"For more information about this error, try `rustc --explain E0716`.","code":null,"level":"","spans":[],"children":[],"rendered":"For more information about this error, try `rustc --explain E0716`.\n"}
[00:59:39] ------------------------------------------
[00:59:39] [00:59:39] thread '[ui (nll)] ui/consts/const-int-rotate.rs' panicked at 'explicit panic', tools/compiletest/src/runtest.rs:3238:9
[00:59:39] [00:59:39] [00:59:39] ---- [ui (nll)] ui/consts/const-int-sign.rs stdout ----
[00:59:39] diff of stderr:
[00:59:39] [00:59:39] - error[E0714]: temporary value dropped while borrowed
[00:59:39] + error[E0716]: temporary value dropped while borrowed
[00:59:39] 3 |
[00:59:39] 3 |
[00:59:39] 4 LL | let x: &'static bool = &(5_i32.is_negative()); //~ ERROR does not live long enough
[00:59:39] 9 |
[00:59:39] 9 |
[00:59:39] 10 = note: borrowed value must be valid for the static lifetime...
[00:59:39] 11 [00:59:39] - error[E0714]: temporary value dropped while borrowed
[00:59:39] + error[E0716]: temporary value dropped while borrowed
[00:59:39] 14 |
[00:59:39] 14 |
[00:59:39] 15 LL | let y: &'static bool = &(5_i32.is_positive()); //~ ERROR does not live long enough
[00:59:39] 21 [00:59:39] 22 error: aborting due to 2 previous errors
[00:59:39] 23 [00:59:39] - For more information about this error, try `rustc --explain E0714`.
[00:59:39] - For more information about this error, try `rustc --explain E0714`.
[00:59:39] + For more information about this error, try `rustc --explain E0716`.
[00:59:39] 25 [00:59:39] [00:59:39] [00:59:39] The actual stderr differed from the expected stderr.
[00:59:39] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/consts/const-int-sign.nll/const-int-sign.nll.stderr
[00:59:39] To update references, rerun the tests and pass the `--bless` flag
[00:59:39] To only update this specific test, also pass `--test-args consts/const-int-sign.rs`
[00:59:39] error: 1 errors occurred comparing output.
[00:59:39] status: exit code: 1
[00:59:39] status: exit code: 1
[00:59:39] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/ui/consts/const-int-sign.rs" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/consts/const-int-sign.nll/a" "-Zborrowck=mir" "-Ztwo-phase-borrows" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/consts/const-int-sign.nll/auxiliary" "-A" "unused"
[00:59:39] ------------------------------------------
[00:59:39] [00:59:39] ------------------------------------------
[00:59:39] stderr:
[00:59:39] stderr:
[00:59:39] ------------------------------------------
[00:59:39] {"message":"temporary value dropped while borrowed","code":{"code":"E0716","explanation":"\nThis error indicates that a temporary value is being dropped\nwhile a borrow is still in active use.\n\nErroneous code example:\n\n```compile_fail,E0716\n# #![feature(nll)]\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet p = bar(&foo());\n // ------ creates a temporary\nlet q = *p;\n```\n\nHere, the expression `&foo()` is borrowing the expression\n`foo()`. As `foo()` is call to a function, and not the name of\na variable, this creates a **temporary** -- that temporary stores\nthe return value from `foo()` so that it can be borrowed.\nSo you might imagine that `let p = bar(&foo())` is equivalent\nto this:\n\n```compile_fail,E0597\n# fn foo() -> i32 { 22 }\n# fn bar(x: &i32) -> &i32 { x }\nlet p = {\n let tmp = foo(); // the temporary\n bar(&tmp)\n}; // <-- tmp is freed as we exit this block\nlet q = p;\n```\n\nWhenever a temporary is created, it is automatically dropped (freed)\naccording to fixed rules. Ordinarily, the temporary is dropped\nat the end of the enclosing statement -- in this case, after the `let`.\nThis is illustrated in the example above by showing that `tmp` would\nbe freed as we exit the block.\n\nTo fix this problem, you need to create a local variable\nto store the value in rather than relying on a temporary.\nFor example, you might change the original program to\nthe following:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = foo(); // dropped at the end of the enclosing block\nlet p = bar(&value);\nlet q = *p;\n```\n\nBy introducing the explicit `let value`, we allocate storage\nthat will last until the end of the enclosing block (when `value`\ngoes out of scope). When we borrow `&value`, we are borrowing a\nlocal variable that already exists, and hence no temporary is created.\n\nTemporaries are not always dropped at the end of the enclosing\nstatement. In simple cases where the `&` expression is immediately\nstored into a variable, the compiler will automatically extend\nthe lifetime of the temporary until the end of the enclosinb\nblock. Therefore, an alternative way to fix the original\nprogram is to write `let tmp = &foo()` and not `let tmp = foo()`:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = &foo();\nlet p = bar(value);\nlet q = *p;\n```\n\nHere, we are still borrowing `foo()`, but as the borrow is assigned\ndirectly into a variable, the temporary will not be dropped until\nthe end of the enclosing block. Similar rules apply when temporaries\nare stored into aggregate structures like a tuple or struct:\n\n```\n// Here, two temporaries are created, but\n// as they are stored directly into `value`,\n// they are not dropped until the end of the\n// enclosing block.\nfn foo() -> i32 { 22 }\nlet value = (&foo(), &foo());\n```\n"},"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/const-int-sign.rs","byte_start":507,"byte_end":528,"line_start":12,"line_end":12,"column_start":29,"column_end":50,"is_primary":true,"text":[{"text":" let x: &'static bool = &(5_i32.is_negative()); //~ ERROR does not live long enough","highlight_start":29,"highlight_end":50}],"label":"creates a temporary which is freed while still in use","suggested_replacement":null,"suggestion_applicability":null,"expansion":null},{"file_name":"/checkout/src/test/ui/consts/const-int-sign.rs","byte_start":653,"byte_end":654,"line_start":14,"line_end":14,"column_start":1,"column_end":2,"is_primary":false,"text":[{"text":"}","highlight_start":1,"highlight_end":2}],"label":"temporary value is freed at the end of this statement","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"borrowed value must be valid for the static lifetime...","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"error[E0716]: temporary value dropped while borrowed\n --> /checkout/src/test/ui/consts/const-int-sign.rs:12:29\n |\nLL | let x: &'static bool = &(5_i32.is_negative()); //~ ERROR does not live long enough\n | ^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use\nLL | let y: &'static bool = &(5_i32.is_positive()); //~ ERROR does not live long enough\nLL | }\n | - temporary value is freed at the end of this statement\n |\n = note: borrowed value must be valid for the static lifetime...\n\n"}
[00:59:39] {"message":"temporary value dropped while borrowed","code":{"code":"E0716","explanation":"\nThis error indicates that a temporary value is being dropped\nwhile a borrow is still in active use.\n\nErroneous code example:\n\n```compile_fail,E0716\n# #![feature(nll)]\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet p = bar(&foo());\n // ------ creates a temporary\nlet q = *p;\n```\n\nHere, the expression `&foo()` is borrowing the expression\n`foo()`. As `foo()` is call to a function, and not the name of\na variable, this creates a **temporary** -- that temporary stores\nthe return value from `foo()` so that it can be borrowed.\nSo you might imagine that `let p = bar(&foo())` is equivalent\nto this:\n\n```compile_fail,E0597\n# fn foo() -> i32 { 22 }\n# fn bar(x: &i32) -> &i32 { x }\nlet p = {\n let tmp = foo(); // the temporary\n bar(&tmp)\n}; // <-- tmp is freed as we exit this block\nlet q = p;\n```\n\nWhenever a temporary is created, it is automatically dropped (freed)\naccording to fixed rules. Ordinarily, the temporary is dropped\nat the end of the enclosing statement -- in this case, after the `let`.\nThis is illustrated in the example above by showing that `tmp` would\nbe freed as we exit the block.\n\nTo fix this problem, you need to create a local variable\nto store the value in rather than relying on a temporary.\nFor example, you might change the original program to\nthe following:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = foo(); // dropped at the end of the enclosing block\nlet p = bar(&value);\nlet q = *p;\n```\n\nBy introducing the explicit `let value`, we allocate storage\nthat will last until the end of the enclosing block (when `value`\ngoes out of scope). When we borrow `&value`, we are borrowing a\nlocal variable that already exists, and hence no temporary is created.\n\nTemporaries are not always dropped at the end of the enclosing\nstatement. In simple cases where the `&` expression is immediately\nstored into a variable, the compiler will automatically extend\nthe lifetime of the temporary until the end of the enclosinb\nblock. Therefore, an alternative way to fix the original\nprogram is to write `let tmp = &foo()` and not `let tmp = foo()`:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = &foo();\nlet p = bar(value);\nlet q = *p;\n```\n\nHere, we are still borrowing `foo()`, but as the borrow is assigned\ndirectly into a variable, the temporary will not be dropped until\nthe end of the enclosing block. Similar rules apply when temporaries\nare stored into aggregate structures like a tuple or struct:\n\n```\n// Here, two temporaries are created, but\n// as they are stored directly into `value`,\n// they are not dropped until the end of the\n// enclosing block.\nfn foo() -> i32 { 22 }\nlet value = (&foo(), &foo());\n```\n"},"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/const-int-sign.rs","byte_start":594,"byte_end":615,"line_start":13,"line_end":13,"column_start":29,"column_end":50,"is_primary":true,"text":[{"text":" let y: &'static bool = &(5_i32.is_positive()); //~ ERROR does not live long enough","highlight_start":29,"highlight_end":50}],"label":"creates a temporary which is freed while still in use","suggested_replacement":null,"suggestion_applicability":null,"expansion":null},{"file_name":"/checkout/src/test/ui/consts/const-int-sign.rs","byte_start":653,"byte_end":654,"line_start":14,"line_end":14,"column_start":1,"column_end":2,"is_primary":false,"text":[{"text":"}","highlight_start":1,"highlight_end":2}],"label":"temporary value is freed at the end of this statement","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"borrowed value must be valid for the static lifetime...","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"error[E0716]: temporary value dropped while borrowed\n --> /checkout/src/test/ui/consts/const-int-sign.rs:13:29\n |\nLL | let y: &'static bool = &(5_i32.is_positive()); //~ ERROR does not live long enough\n | ^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use\nLL | }\n | - temporary value is freed at the end of this statement\n |\n = note: borrowed value must be valid for the static lifetime...\n\n"}
[00:59:39] {"message":"aborting due to 2 previous errors","code":null,"level":"error","spans":[],"children":[],"rendered":"error: aborting due to 2 previous errors\n\n"}
[00:59:39] {"message":"For more information about this error, try `rustc --explain E0716`.","code":null,"level":"","spans":[],"children":[],"rendered":"For more information about this error, try `rustc --explain E0716`.\n"}
[00:59:39] ------------------------------------------
[00:59:39] [00:59:39] thread '[ui (nll)] ui/consts/const-int-sign.rs' panicked at 'explicit panic', tools/compiletest/src/runtest.rs:3238:9
[00:59:39] [00:59:39] [00:59:39] ---- [ui (nll)] ui/consts/const-int-wrapping.rs stdout ----
[00:59:39] diff of stderr:
[00:59:39] [00:59:39] - error[E0714]: temporary value dropped while borrowed
[00:59:39] + error[E0716]: temporary value dropped while borrowed
[00:59:39] 3 |
[00:59:39] 3 |
[00:59:39] 4 LL | let x: &'static i32 = &(5_i32.wrapping_add(3)); //~ ERROR does not live long enough
[00:59:39] 9 |
[00:59:39] 9 |
[00:59:39] 10 = note: borrowed value must be valid for the static lifetime...
[00:59:39] 11 [00:59:39] - error[E0714]: temporary value dropped while borrowed
[00:59:39] + error[E0716]: temporary value dropped while borrowed
[00:59:39] 14 |
[00:59:39] 14 |
[00:59:39] 15 LL | let y: &'static i32 = &(5_i32.wrapping_sub(3)); //~ ERROR does not live long enough
[00:59:39] 20 |
[00:59:39] 20 |
[00:59:39] 21 = note: borrowed value must be valid for the static lifetime...
[00:59:39] 22 [00:59:39] - error[E0714]: temporary value dropped while borrowed
[00:59:39] + error[E0716]: temporary value dropped while borrowed
[00:59:39] 25 |
[00:59:39] 25 |
[00:59:39] 26 LL | let z: &'static i32 = &(5_i32.wrapping_mul(3)); //~ ERROR does not live long enough
[00:59:39] 31 |
[00:59:39] 31 |
[00:59:39] 32 = note: borrowed value must be valid for the static lifetime...
[00:59:39] 33 [00:59:39] - error[E0714]: temporary value dropped while borrowed
[00:59:39] + error[E0716]: temporary value dropped while borrowed
[00:59:39] 36 |
[00:59:39] 36 |
[00:59:39] 37 LL | let a: &'static i32 = &(5_i32.wrapping_shl(3)); //~ ERROR does not live long enough
[00:59:39] 42 |
[00:59:39] 42 |
[00:59:39] 43 = note: borrowed value must be valid for the static lifetime...
[00:59:39] 44 [00:59:39] - error[E0714]: temporary value dropped while borrowed
[00:59:39] + error[E0716]: temporary value dropped while borrowed
[00:59:39] 47 |
[00:59:39] 47 |
[00:59:39] 48 LL | let b: &'static i32 = &(5_i32.wrapping_shr(3)); //~ ERROR does not live long enough
[00:59:39] 54 [00:59:39] 55 error: aborting due to 5 previous errors
[00:59:39] 56 [00:59:39] - For more information about this error, try `rustc --explain E0714`.
[00:59:39] - For more information about this error, try `rustc --explain E0714`.
[00:59:39] + For more information about this error, try `rustc --explain E0716`.
[00:59:39] 58 [00:59:39] [00:59:39] [00:59:39] The actual stderr differed from the expected stderr.
[00:59:39] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/consts/const-int-wrapping.nll/const-int-wrapping.nll.stderr
[00:59:39] To update references, rerun the tests and pass the `--bless` flag
[00:59:39] To only update this specific test, also pass `--test-args consts/const-int-wrapping.rs`
[00:59:39] error: 1 errors occurred comparing output.
[00:59:39] status: exit code: 1
[00:59:39] status: exit code: 1
[00:59:39] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/ui/consts/const-int-wrapping.rs" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/consts/const-int-wrapping.nll/a" "-Zborrowck=mir" "-Ztwo-phase-borrows" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/consts/const-int-wrapping.nll/auxiliary" "-A" "unused"
[00:59:39] ------------------------------------------
[00:59:39] [00:59:39] ------------------------------------------
[00:59:39] stderr:
[00:59:39] stderr:
[00:59:39] ------------------------------------------
[00:59:39] {"message":"temporary value dropped while borrowed","code":{"code":"E0716","explanation":"\nThis error indicates that a temporary value is being dropped\nwhile a borrow is still in active use.\n\nErroneous code example:\n\n```compile_fail,E0716\n# #![feature(nll)]\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet p = bar(&foo());\n // ------ creates a temporary\nlet q = *p;\n```\n\nHere, the expression `&foo()` is borrowing the expression\n`foo()`. As `foo()` is call to a function, and not the name of\na variable, this creates a **temporary** -- that temporary stores\nthe return value from `foo()` so that it can be borrowed.\nSo you might imagine that `let p = bar(&foo())` is equivalent\nto this:\n\n```compile_fail,E0597\n# fn foo() -> i32 { 22 }\n# fn bar(x: &i32) -> &i32 { x }\nlet p = {\n let tmp = foo(); // the temporary\n bar(&tmp)\n}; // <-- tmp is freed as we exit this block\nlet q = p;\n```\n\nWhenever a temporary is created, it is automatically dropped (freed)\naccording to fixed rules. Ordinarily, the temporary is dropped\nat the end of the enclosing statement -- in this case, after the `let`.\nThis is illustrated in the example above by showing that `tmp` would\nbe freed as we exit the block.\n\nTo fix this problem, you need to create a local variable\nto store the value in rather than relying on a temporary.\nFor example, you might change the original program to\nthe following:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = foo(); // dropped at the end of the enclosing block\nlet p = bar(&value);\nlet q = *p;\n```\n\nBy introducing the explicit `let value`, we allocate storage\nthat will last until the end of the enclosing block (when `value`\ngoes out of scope). When we borrow `&value`, we are borrowing a\nlocal variable that already exists, and hence no temporary is created.\n\nTemporaries are not always dropped at the end of the enclosing\nstatement. In simple cases where the `&` expression is immediately\nstored into a variable, the compiler will automatically extend\nthe lifetime of the temporary until the end of the enclosinb\nblock. Therefore, an alternative way to fix the original\nprogram is to write `let tmp = &foo()` and not `let tmp = foo()`:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = &foo();\nlet p = bar(value);\nlet q = *p;\n```\n\nHere, we are still borrowing `foo()`, but as the borrow is assigned\ndirectly into a variable, the temporary will not be dropped until\nthe end of the enclosing block. Similar rules apply when temporaries\nare stored into aggregate structures like a tuple or struct:\n\n```\n// Here, two temporaries are created, but\n// as they are stored directly into `value`,\n// they are not dropped until the end of the\n// enclosing block.\nfn foo() -> i32 { 22 }\nlet value = (&foo(), &foo());\n```\n"},"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/const-int-wrapping.rs","byte_start":506,"byte_end":529,"line_start":12,"line_end":12,"column_start":28,"column_end":51,"is_primary":true,"text":[{"text":" let x: &'static i32 = &(5_i32.wrapping_add(3)); //~ ERROR does not live long enough","highlight_start":28,"highlight_end":51}],"label":"creates a temporary which is freed while still in use","suggested_replacement":null,"suggestion_applicability":null,"expansion":null},{"file_name":"/checkout/src/test/ui/consts/const-int-wrapping.rs","byte_start":919,"byte_end":920,"line_start":17,"line_end":17,"column_start":1,"column_end":2,"is_primary":false,"text":[{"text":"}","highlight_start":1,"highlight_end":2}],"label":"temporary value is freed at the end of this statement","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"borrowed value must be valid for the static lifetime...","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"error[E0716]: temporary value dropped while borrowed\n --> /checkout/src/test/ui/consts/const-int-wrapping.rs:12:28\n |\nLL | let x: &'static i32 = &(5_i32.wrapping_add(3)); //~ ERROR does not live long enough\n | ^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use\n...\nLL | }\n | - temporary value is freed at the end of this statement\n |\n = note: borrowed value must be valid for the static lifetime...\n\n"}
[00:59:39] {"message":"temporary value dropped while borrowed","code":{"code":"E0716","explanation":"\nThis error indicates that a temporary value is being dropped\nwhile a borrow is still in active use.\n\nErroneous code example:\n\n```compile_fail,E0716\n# #![feature(nll)]\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet p = bar(&foo());\n // ------ creates a temporary\nlet q = *p;\n```\n\nHere, the expression `&foo()` is borrowing the expression\n`foo()`. As `foo()` is call to a function, and not the name of\na variable, this creates a **temporary** -- that temporary stores\nthe return value from `foo()` so that it can be borrowed.\nSo you might imagine that `let p = bar(&foo())` is equivalent\nto this:\n\n```compile_fail,E0597\n# fn foo() -> i32 { 22 }\n# fn bar(x: &i32) -> &i32 { x }\nlet p = {\n let tmp = foo(); // the temporary\n bar(&tmp)\n}; // <-- tmp is freed as we exit this block\nlet q = p;\n```\n\nWhenever a temporary is created, it is automatically dropped (freed)\naccording to fixed rules. Ordinarily, the temporary is dropped\nat the end of the enclosing statement -- in this case, after the `let`.\nThis is illustrated in the example above by showing that `tmp` would\nbe freed as we exit the block.\n\nTo fix this problem, you need to create a local variable\nto store the value in rather than relying on a temporary.\nFor example, you might change the original program to\nthe following:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = foo(); // dropped at the end of the enclosing block\nlet p = bar(&value);\nlet q = *p;\n```\n\nBy introducing the explicit `let value`, we allocate storage\nthat will last until the end of the enclosing block (when `value`\ngoes out of scope). When we borrow `&value`, we are borrowing a\nlocal variable that already exists, and hence no temporary is created.\n\nTemporaries are not always dropped at the end of the enclosing\nstatement. In simple cases where the `&` expression is immediately\nstored into a variable, the compiler will automatically extend\nthe lifetime of the temporary until the end of the enclosinb\nblock. Therefore, an alternative way to fix the original\nprogram is to write `let tmp = &foo()` and not `let tmp = foo()`:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = &foo();\nlet p = bar(value);\nlet q = *p;\n```\n\nHere, we are still borrowing `foo()`, but as the borrow is assigned\ndirectly into a variable, the temporary will not be dropped until\nthe end of the enclosing block. Similar rules apply when temporaries\nare stored into aggregate structures like a tuple or struct:\n\n```\n// Here, two temporaries are created, but\n// as they are stored directly into `value`,\n// they are not dropped until the end of the\n// enclosing block.\nfn foo() -> i32 { 22 }\nlet value = (&foo(), &foo());\n```\n"},"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/const-int-wrapping.rs","byte_start":594,"byte_end":617,"line_start":13,"line_end":13,"column_start":28,"column_end":51,"is_primary":true,"text":[{"text":" let y: &'static i32 = &(5_i32.wrapping_sub(3)); //~ ERROR does not live long enough","highlight_start":28,"highlight_end":51}],"label":"creates a temporary which is freed while still in use","suggested_replacement":null,"suggestion_applicability":null,"expansion":null},{"file_name":"/checkout/src/test/ui/consts/const-int-wrapping.rs","byte_start":919,"byte_end":920,"line_start":17,"line_end":17,"column_start":1,"column_end":2,"is_primary":false,"text":[{"text":"}","highlight_start":1,"highlight_end":2}],"label":"temporary value is freed at the end of this statement","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"borrowed value must be valid for the static lifetime...","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"error[E0716]: temporary value dropped while borrowed\n --> /checkout/src/test/ui/consts/const-int-wrapping.rs:13:28\n |\nLL | let y: &'static i32 = &(5_i32.wrapping_sub(3)); //~ ERROR does not live long enough\n | ^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use\n...\nLL | }\n | - temporary value is freed at the end of this statement\n |\n = note: borrowed value must be valid for the static lifetime...\n\n"}
[00:59:39] {"message":"temporary value dropped while borrowed","code":{"code":"E0716","explanation":"\nThis error indicates that a temporary value is being dropped\nwhile a borrow is still in active use.\n\nErroneous code example:\n\n```compile_fail,E0716\n# #![feature(nll)]\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet p = bar(&foo());\n // ------ creates a temporary\nlet q = *p;\n```\n\nHere, the expression `&foo()` is borrowing the expression\n`foo()`. As `foo()` is call to a function, and not the name of\na variable, this creates a **temporary** -- that temporary stores\nthe return value from `foo()` so that it can be borrowed.\nSo you might imagine that `let p = bar(&foo())` is equivalent\nto this:\n\n```compile_fail,E0597\n# fn foo() -> i32 { 22 }\n# fn bar(x: &i32) -> &i32 { x }\nlet p = {\n let tmp = foo(); // the temporary\n bar(&tmp)\n}; // <-- tmp is freed as we exit this block\nlet q = p;\n```\n\nWhenever a temporary is created, it is automatically dropped (freed)\naccording to fixed rules. Ordinarily, the temporary is dropped\nat the end of the enclosing statement -- in this case, after the `let`.\nThis is illustrated in the example above by showing that `tmp` would\nbe freed as we exit the block.\n\nTo fix this problem, you need to create a local variable\nto store the value in rather than relying on a temporary.\nFor example, you might change the original program to\nthe following:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = foo(); // dropped at the end of the enclosing block\nlet p = bar(&value);\nlet q = *p;\n```\n\nBy introducing the explicit `let value`, we allocate storage\nthat will last until the end of the enclosing block (when `value`\ngoes out of scope). When we borrow `&value`, we are borrowing a\nlocal variable that already exists, and hence no temporary is created.\n\nTemporaries are not always dropped at the end of the enclosing\nstatement. In simple cases where the `&` expression is immediately\nstored into a variable, the compiler will automatically extend\nthe lifetime of the temporary until the end of the enclosinb\nblock. Therefore, an alternative way to fix the original\nprogram is to write `let tmp = &foo()` and not `let tmp = foo()`:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = &foo();\nlet p = bar(value);\nlet q = *p;\n```\n\nHere, we are still borrowing `foo()`, but as the borrow is assigned\ndirectly into a variable, the temporary will not be dropped until\nthe end of the enclosing block. Similar rules apply when temporaries\nare stored into aggregate structures like a tuple or struct:\n\n```\n// Here, two temporaries are created, but\n// as they are stored directly into `value`,\n// they are not dropped until the end of the\n// enclosing block.\nfn foo() -> i32 { 22 }\nlet value = (&foo(), &foo());\n```\n"},"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/const-int-wrapping.rs","byte_start":682,"byte_end":705,"line_start":14,"line_end":14,"column_start":28,"column_end":51,"is_primary":true,"text":[{"text":" let z: &'static i32 = &(5_i32.wrapping_mul(3)); //~ ERROR does not live long enough","highlight_start":28,"highlight_end":51}],"label":"creates a temporary which is freed while still in use","suggested_replacement":null,"suggestion_applicability":null,"expansion":null},{"file_name":"/checkout/src/test/ui/consts/const-int-wrapping.rs","byte_start":919,"byte_end":920,"line_start":17,"line_end":17,"column_start":1,"column_end":2,"is_primary":false,"text":[{"text":"}","highlight_start":1,"highlight_end":2}],"label":"temporary value is freed at the end of this statement","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"borrowed value must be valid for the static lifetime...","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"error[E0716]: temporary value dropped while borrowed\n --> /checkout/src/test/ui/consts/const-int-wrapping.rs:14:28\n |\nLL | let z: &'static i32 = &(5_i32.wrapping_mul(3)); //~ ERROR does not live long enough\n | ^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use\n...\nLL | }\n | - temporary value is freed at the end of this statement\n |\n = note: borrowed value must be valid for the static lifetime...\n\n"}
[00:59:39] {"message":"temporary value dropped while borrowed","code":{"code":"E0716","explanation":"\nThis error indicates that a temporary value is being dropped\nwhile a borrow is still in active use.\n\nErroneous code example:\n\n```compile_fail,E0716\n# #![feature(nll)]\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet p = bar(&foo());\n // ------ creates a temporary\nlet q = *p;\n```\n\nHere, the expression `&foo()` is borrowing the expression\n`foo()`. As `foo()` is call to a function, and not the name of\na variable, this creates a **temporary** -- that temporary stores\nthe return value from `foo()` so that it can be borrowed.\nSo you might imagine that `let p = bar(&foo())` is equivalent\nto this:\n\n```compile_fail,E0597\n# fn foo() -> i32 { 22 }\n# fn bar(x: &i32) -> &i32 { x }\nlet p = {\n let tmp = foo(); // the temporary\n bar(&tmp)\n}; // <-- tmp is freed as we exit this block\nlet q = p;\n```\n\nWhenever a temporary is created, it is automatically dropped (freed)\naccording to fixed rules. Ordinarily, the temporary is dropped\nat the end of the enclosing statement -- in this case, after the `let`.\nThis is illustrated in the example above by showing that `tmp` would\nbe freed as we exit the block.\n\nTo fix this problem, you need to create a local variable\nto store the value in rather than relying on a temporary.\nFor example, you might change the original program to\nthe following:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = foo(); // dropped at the end of the enclosing block\nlet p = bar(&value);\nlet q = *p;\n```\n\nBy introducing the explicit `let value`, we allocate storage\nthat will last until the end of the enclosing block (when `value`\ngoes out of scope). When we borrow `&value`, we are borrowing a\nlocal variable that already exists, and hence no temporary is created.\n\nTemporaries are not always dropped at the end of the enclosing\nstatement. In simple cases where the `&` expression is immediately\nstored into a variable, the compiler will automatically extend\nthe lifetime of the temporary until the end of the enclosinb\nblock. Therefore, an alternative way to fix the original\nprogram is to write `let tmp = &foo()` and not `let tmp = foo()`:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = &foo();\nlet p = bar(value);\nlet q = *p;\n```\n\nHere, we are still borrowing `foo()`, but as the borrow is assigned\ndirectly into a variable, the temporary will not be dropped until\nthe end of the enclosing block. Similar rules apply when temporaries\nare stored into aggregate structures like a tuple or struct:\n\n```\n// Here, two temporaries are created, but\n// as they are stored directly into `value`,\n// they are not dropped until the end of the\n// enclosing block.\nfn foo() -> i32 { 22 }\nlet value = (&foo(), &foo());\n```\n"},"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/const-int-wrapping.rs","byte_start":770,"byte_end":793,"line_start":15,"line_end":15,"column_start":28,"column_end":51,"is_primary":true,"text":[{"text":" let a: &'static i32 = &(5_i32.wrapping_shl(3)); //~ ERROR does not live long enough","highlight_start":28,"highlight_end":51}],"label":"creates a temporary which is freed while still in use","suggested_replacement":null,"suggestion_applicability":null,"expansion":null},{"file_name":"/checkout/src/test/ui/consts/const-int-wrapping.rs","byte_start":919,"byte_end":920,"line_start":17,"line_end":17,"column_start":1,"column_end":2,"is_primary":false,"text":[{"text":"}","highlight_start":1,"highlight_end":2}],"label":"temporary value is freed at the end of this statement","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"borrowed value must be valid for the static lifetime...","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"error[E0716]: temporary value dropped while borrowed\n --> /checkout/src/test/ui/consts/const-int-wrapping.rs:15:28\n |\nLL | let a: &'static i32 = &(5_i32.wrapping_shl(3)); //~ ERROR does not live long enough\n | ^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use\nLL | let b: &'static i32 = &(5_i32.wrapping_shr(3)); //~ ERROR does not live long enough\nLL | }\n | - temporary value is freed at the end of this statement\n |\n = note: borrowed value must be valid for the static lifetime...\n\n"}
[00:59:39] {"message":"temporary value dropped while borrowed","code":{"code":"E0716","explanation":"\nThis error indicates that a temporary value is being dropped\nwhile a borrow is still in active use.\n\nErroneous code example:\n\n```compile_fail,E0716\n# #![feature(nll)]\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet p = bar(&foo());\n // ------ creates a temporary\nlet q = *p;\n```\n\nHere, the expression `&foo()` is borrowing the expression\n`foo()`. As `foo()` is call to a function, and not the name of\na variable, this creates a **temporary** -- that temporary stores\nthe return value from `foo()` so that it can be borrowed.\nSo you might imagine that `let p = bar(&foo())` is equivalent\nto this:\n\n```compile_fail,E0597\n# fn foo() -> i32 { 22 }\n# fn bar(x: &i32) -> &i32 { x }\nlet p = {\n let tmp = foo(); // the temporary\n bar(&tmp)\n}; // <-- tmp is freed as we exit this block\nlet q = p;\n```\n\nWhenever a temporary is created, it is automatically dropped (freed)\naccording to fixed rules. Ordinarily, the temporary is dropped\nat the end of the enclosing statement -- in this case, after the `let`.\nThis is illustrated in the example above by showing that `tmp` would\nbe freed as we exit the block.\n\nTo fix this problem, you need to create a local variable\nto store the value in rather than relying on a temporary.\nFor example, you might change the original program to\nthe following:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = foo(); // dropped at the end of the enclosing block\nlet p = bar(&value);\nlet q = *p;\n```\n\nBy introducing the explicit `let value`, we allocate storage\nthat will last until the end of the enclosing block (when `value`\ngoes out of scope). When we borrow `&value`, we are borrowing a\nlocal variable that already exists, and hence no temporary is created.\n\nTemporaries are not always dropped at the end of the enclosing\nstatement. In simple cases where the `&` expression is immediately\nstored into a variable, the compiler will automatically extend\nthe lifetime of the temporary until the end of the enclosinb\nblock. Therefore, an alternative way to fix the original\nprogram is to write `let tmp = &foo()` and not `let tmp = foo()`:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = &foo();\nlet p = bar(value);\nlet q = *p;\n```\n\nHere, we are still borrowing `foo()`, but as the borrow is assigned\ndirectly into a variable, the temporary will not be dropped until\nthe end of the enclosing block. Similar rules apply when temporaries\nare stored into aggregate structures like a tuple or struct:\n\n```\n// Here, two temporaries are created, but\n// as they are stored directly into `value`,\n// they are not dropped until the end of the\n// enclosing block.\nfn foo() -> i32 { 22 }\nlet value = (&foo(), &foo());\n```\n"},"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/const-int-wrapping.rs","byte_start":858,"byte_end":881,"line_start":16,"line_end":16,"column_start":28,"column_end":51,"is_primary":true,"text":[{"text":" let b: &'static i32 = &(5_i32.wrapping_shr(3)); //~ ERROR does not live long enough","highlight_start":28,"highlight_end":51}],"label":"creates a temporary which is freed while still in use","suggested_replacement":null,"suggestion_applicability":null,"expansion":null},{"file_name":"/checkout/src/test/ui/consts/const-int-wrapping.rs","byte_start":919,"byte_end":920,"line_start":17,"line_end":17,"column_start":1,"column_end":2,"is_primary":false,"text":[{"text":"}","highlight_start":1,"highlight_end":2}],"label":"temporary value is freed at the end of this statement","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"borrowed value must be valid for the static lifetime...","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"error[E0716]: temporary value dropped while borrowed\n --> /checkout/src/test/ui/consts/const-int-wrapping.rs:16:28\n |\nLL | let b: &'static i32 = &(5_i32.wrapping_shr(3)); //~ ERROR does not live long enough\n | ^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use\nLL | }\n | - temporary value is freed at the end of this statement\n |\n = note: borrowed value must be valid for the static lifetime...\n\n"}
[00:59:39] {"message":"aborting due to 5 previous errors","code":null,"level":"error","spans":[],"children":[],"rendered":"error: aborting due to 5 previous errors\n\n"}
[00:59:39] {"message":"For more information about this error, try `rustc --explain E0716`.","code":null,"level":"","spans":[],"children":[],"rendered":"For more information about this error, try `rustc --explain E0716`.\n"}
[00:59:39] ------------------------------------------
[00:59:39] [00:59:39] thread '[ui (nll)] ui/consts/const-int-wrapping.rs' panicked at 'explicit panic', tools/compiletest/src/runtest.rs:3238:9
[00:59:39] [00:59:39] [00:59:39] ---- [ui (nll)] ui/consts/min_const_fn/min_const_fn_dyn.rs stdout ----
[00:59:39] diff of stderr:
[00:59:39] [00:59:39] 10 LL | const fn no_inner_dyn_trait_ret() -> Hide { Hide(HasDyn { field: &0 }) }
[00:59:39] 12 [00:59:39] 12 [00:59:39] - error[E0714]: temporary value dropped while borrowed
[00:59:39] + error[E0716]: temporary value dropped while borrowed
[00:59:39] 15 |
[00:59:39] 15 |
[00:59:39] 16 LL | const fn no_inner_dyn_trait_ret() -> Hide { Hide(HasDyn { field: &0 }) }
[00:59:39] 22 [00:59:39] 23 error: aborting due to 3 previous errors
[00:59:39] 24 [00:59:39] - For more information about this error, try `rustc --explain E0714`.
[00:59:39] - For more information about this error, try `rustc --explain E0714`.
[00:59:39] + For more information about this error, try `rustc --explain E0716`.
[00:59:39] 26 [00:59:39] [00:59:39] [00:59:39] The actual stderr differed from the expected stderr.
[00:59:39] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/consts/min_const_fn/min_const_fn_dyn.nll/min_const_fn_dyn.nll.stderr
[00:59:39] To update references, rerun the tests and pass the `--bless` flag
[00:59:39] To only update this specific test, also pass `--test-args consts/min_const_fn/min_const_fn_dyn.rs`
[00:59:39] error: 1 errors occurred comparing output.
[00:59:39] status: exit code: 1
[00:59:39] status: exit code: 1
[00:59:39] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/ui/consts/min_const_fn/min_const_fn_dyn.rs" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/consts/min_const_fn/min_const_fn_dyn.nll/a" "-Zborrowck=mir" "-Ztwo-phase-borrows" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/consts/min_const_fn/min_const_fn_dyn.nll/auxiliary" "-A" "unused"
[00:59:39] ------------------------------------------
[00:59:39] [00:59:39] ------------------------------------------
[00:59:39] stderr:
[00:59:39] stderr:
[00:59:39] ------------------------------------------
[00:59:39] {"message":"trait bounds other than `Sized` on const fn parameters are unstable","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn_dyn.rs","byte_start":661,"byte_end":670,"line_start":21,"line_end":21,"column_start":5,"column_end":14,"is_primary":true,"text":[{"text":" x.0.field;","highlight_start":5,"highlight_end":14}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: trait bounds other than `Sized` on const fn parameters are unstable\n --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn_dyn.rs:21:5\n |\nLL | x.0.field;\n | ^^^^^^^^^\n\n"}
[00:59:39] {"message":"trait bounds other than `Sized` on const fn parameters are unstable","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn_dyn.rs","byte_start":782,"byte_end":784,"line_start":24,"line_end":24,"column_start":66,"column_end":68,"is_primary":true,"text":[{"text":"const fn no_inner_dyn_trait_ret() -> Hide { Hide(HasDyn { field: &0 }) }","highlight_start":66,"highlight_end":68}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: trait bounds other than `Sized` on const fn parameters are unstable\n --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn_dyn.rs:24:66\n |\nLL | const fn no_inner_dyn_trait_ret() -> Hide { Hide(HasDyn { field: &0 }) }\n | ^^\n\n"}
[00:59:39] {"message":"temporary value dropped while borrowed","code":{"code":"E0716","explanation":"\nThis error indicates that a temporary value is being dropped\nwhile a borrow is still in active use.\n\nErroneous code example:\n\n```compile_fail,E0716\n# #![feature(nll)]\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet p = bar(&foo());\n // ------ creates a temporary\nlet q = *p;\n```\n\nHere, the expression `&foo()` is borrowing the expression\n`foo()`. As `foo()` is call to a function, and not the name of\na variable, this creates a **temporary** -- that temporary stores\nthe return value from `foo()` so that it can be borrowed.\nSo you might imagine that `let p = bar(&foo())` is equivalent\nto this:\n\n```compile_fail,E0597\n# fn foo() -> i32 { 22 }\n# fn bar(x: &i32) -> &i32 { x }\nlet p = {\n let tmp = foo(); // the temporary\n bar(&tmp)\n}; // <-- tmp is freed as we exit this block\nlet q = p;\n```\n\nWhenever a temporary is created, it is automatically dropped (freed)\naccording to fixed rules. Ordinarily, the temporary is dropped\nat the end of the enclosing statement -- in this case, after the `let`.\nThis is illustrated in the example above by showing that `tmp` would\nbe freed as we exit the block.\n\nTo fix this problem, you need to create a local variable\nto store the value in rather than relying on a temporary.\nFor example, you might change the original program to\nthe following:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = foo(); // dropped at the end of the enclosing block\nlet p = bar(&value);\nlet q = *p;\n```\n\nBy introducing the explicit `let value`, we allocate storage\nthat will last until the end of the enclosing block (when `value`\ngoes out of scope). When we borrow `&value`, we are borrowing a\nlocal variable that already exists, and hence no temporary is created.\n\nTemporaries are not always dropped at the end of the enclosing\nstatement. In simple cases where the `&` expression is immediately\nstored into a variable, the compiler will automatically extend\nthe lifetime of the temporary until the end of the enclosinb\nblock. Therefore, an alternative way to fix the original\nprogram is to write `let tmp = &foo()` and not `let tmp = foo()`:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = &foo();\nlet p = bar(value);\nlet q = *p;\n```\n\nHere, we are still borrowing `foo()`, but as the borrow is assigned\ndirectly into a variable, the temporary will not be dropped until\nthe end of the enclosing block. Similar rules apply when temporaries\nare stored into aggregate structures like a tuple or struct:\n\n```\n// Here, two temporaries are created, but\n// as they are stored directly into `value`,\n// they are not dropped until the end of the\n// enclosing block.\nfn foo() -> i32 { 22 }\nlet value = (&foo(), &foo());\n```\n"},"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn_dyn.rs","byte_start":783,"byte_end":784,"line_start":24,"line_end":24,"column_start":67,"column_end":68,"is_primary":true,"text":[{"text":"const fn no_inner_dyn_trait_ret() -> Hide { Hide(HasDyn { field: &0 }) }","highlight_start":67,"highlight_end":68}],"label":"creates a temporary which is freed while still in use","suggested_replacement":null,"suggestion_applicability":null,"expansion":null},{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn_dyn.rs","byte_start":788,"byte_end":789,"line_start":24,"line_end":24,"column_start":72,"column_end":73,"is_primary":false,"text":[{"text":"const fn no_inner_dyn_trait_ret() -> Hide { Hide(HasDyn { field: &0 }) }","highlight_start":72,"highlight_end":73}],"label":"temporary value is freed at the end of this statement","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"borrowed value must be valid for the static lifetime...","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"error[E0716]: temporary value dropped while borrowed\n --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn_dyn.rs:24:67\n |\nLL | const fn no_inner_dyn_trait_ret() -> Hide { Hide(HasDyn { field: &0 }) }\n | ^ - temporary value is freed at the end of this statement\n | |\n | creates a temporary which is freed while still in use\n |\n = note: borrowed value must be valid for the static lifetime...\n\n"}
[00:59:39] {"message":"aborting due to 3 previous errors","code":null,"level":"error","spans":[],"children":[],"rendered":"error: aborting due to 3 previous errors\n\n"}
[00:59:39] {"message":"For more information about this error, try `rustc --explain E0716`.","code":null,"level":"","spans":[],"children":[],"rendered":"For more information about this error, try `rustc --explain E0716`.\n"}
[00:59:39] ------------------------------------------
[00:59:39] [00:59:39] thread '[ui (nll)] ui/consts/min_const_fn/min_const_fn_dyn.rs' panicked at 'explicit panic', tools/compiletest/src/runtest.rs:3238:9
[00:59:39] [00:59:39] [00:59:39] ---- [ui (nll)] ui/consts/min_const_fn/min_const_fn.rs stdout ----
[00:59:39] diff of stderr:
[00:59:39] [00:59:39] 190 LL | const fn no_dyn_trait_ret() -> &'static dyn std::fmt::Debug { &() }
[00:59:39] 192 [00:59:39] 192 [00:59:39] - error[E0714]: temporary value dropped while borrowed
[00:59:39] + error[E0716]: temporary value dropped while borrowed
[00:59:39] 195 |
[00:59:39] 195 |
[00:59:39] 196 LL | const fn no_dyn_trait_ret() -> &'static dyn std::fmt::Debug { &() }
[00:59:39] 220 [00:59:39] 221 error: aborting due to 36 previous errors
[00:59:39] 222 [00:59:39] - Some errors occurred: E0493, E0714.
[00:59:39] - Some errors occurred: E0493, E0714.
[00:59:39] + Some errors occurred: E0493, E0716.
[00:59:39] 224 For more information about an error, try `rustc --explain E0493`.
[00:59:39] 225 [00:59:39] [00:59:39] [00:59:39] The actual stderr differed from the expected stderr.
[00:59:39] Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/consts/min_const_fn/min_const_fn.nll/min_const_fn.nll.stderr
[00:59:39] To update references, rerun the tests and pass the `--bless` flag
[00:59:39] To only update this specific test, also pass `--test-args consts/min_const_fn/min_const_fn.rs`
[00:59:39] error: 1 errors occurred comparing output.
[00:59:39] status: exit code: 1
[00:59:39] status: exit code: 1
[00:59:39] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-C" "prefer-dynamic" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/consts/min_const_fn/min_const_fn.nll/a" "-Zborrowck=mir" "-Ztwo-phase-borrows" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/consts/min_const_fn/min_const_fn.nll/auxiliary" "-A" "unused"
[00:59:39] ------------------------------------------
[00:59:39] [00:59:39] ------------------------------------------
[00:59:39] stderr:
[00:59:39] stderr:
[00:59:39] ------------------------------------------
[00:59:39] {"message":"destructors cannot be evaluated at compile-time","code":{"code":"E0493","explanation":null},"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs","byte_start":1758,"byte_end":1762,"line_start":49,"line_end":49,"column_start":25,"column_end":29,"is_primary":true,"text":[{"text":" const fn into_inner(self) -> T { self.0 } //~ destructors cannot be evaluated","highlight_start":25,"highlight_end":29}],"label":"constant functions cannot evaluate destructors","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error[E0493]: destructors cannot be evaluated at compile-time\n --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:49:25\n |\nLL | const fn into_inner(self) -> T { self.0 } //~ destructors cannot be evaluated\n | ^^^^ constant functions cannot evaluate destructors\n\n"}
[00:59:39] {"message":"mutable references in const fn are unstable","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs","byte_start":1893,"byte_end":1899,"line_start":51,"line_end":51,"column_start":36,"column_end":42,"is_primary":true,"text":[{"text":" const fn get_mut(&mut self) -> &mut T { &mut self.0 }","highlight_start":36,"highlight_end":42}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: mutable references in const fn are unstable\n --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:51:36\n |\nLL | const fn get_mut(&mut self) -> &mut T { &mut self.0 }\n | ^^^^^^\n\n"}
[00:59:39] {"message":"destructors cannot be evaluated at compile-time","code":{"code":"E0493","explanation":null},"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs","byte_start":2064,"byte_end":2068,"line_start":56,"line_end":56,"column_start":28,"column_end":32,"is_primary":true,"text":[{"text":" const fn into_inner_lt(self) -> T { self.0 } //~ destructors cannot be evaluated","highlight_start":28,"highlight_end":32}],"label":"constant functions cannot evaluate destructors","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error[E0493]: destructors cannot be evaluated at compile-time\n --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:56:28\n |\nLL | const fn into_inner_lt(self) -> T { self.0 } //~ destructors cannot be evaluated\n | ^^^^ constant functions cannot evaluate destructors\n\n"}
[00:59:39] {"message":"mutable references in const fn are unstable","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs","byte_start":2211,"byte_end":2217,"line_start":58,"line_end":58,"column_start":42,"column_end":48,"is_primary":true,"text":[{"text":" const fn get_mut_lt(&'a mut self) -> &mut T { &mut self.0 }","highlight_start":42,"highlight_end":48}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: mutable references in const fn are unstable\n --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:58:42\n |\nLL | const fn get_mut_lt(&'a mut self) -> &mut T { &mut self.0 }\n | ^^^^^^\n\n"}
[00:59:39] {"message":"destructors cannot be evaluated at compile-time","code":{"code":"E0493","explanation":null},"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs","byte_start":2383,"byte_end":2387,"line_start":63,"line_end":63,"column_start":27,"column_end":31,"is_primary":true,"text":[{"text":" const fn into_inner_s(self) -> T { self.0 } //~ ERROR destructors","highlight_start":27,"highlight_end":31}],"label":"constant functions cannot evaluate destructors","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error[E0493]: destructors cannot be evaluated at compile-time\n --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:63:27\n |\nLL | const fn into_inner_s(self) -> T { self.0 } //~ ERROR destructors\n | ^^^^ constant functions cannot evaluate destructors\n\n"}
[00:59:39] {"message":"mutable references in const fn are unstable","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs","byte_start":2508,"byte_end":2514,"line_start":65,"line_end":65,"column_start":38,"column_end":44,"is_primary":true,"text":[{"text":" const fn get_mut_s(&mut self) -> &mut T { &mut self.0 }","highlight_start":38,"highlight_end":44}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: mutable references in const fn are unstable\n --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:65:38\n |\nLL | const fn get_mut_s(&mut self) -> &mut T { &mut self.0 }\n | ^^^^^^\n\n"}
[00:59:39] {"message":"mutable references in const fn are unstable","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs","byte_start":2694,"byte_end":2700,"line_start":70,"line_end":70,"column_start":39,"column_end":45,"is_primary":true,"text":[{"text":" const fn get_mut_sq(&mut self) -> &mut T { &mut self.0 }","highlight_start":39,"highlight_end":45}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: mutable references in const fn are unstable\n --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:70:39\n |\nLL | const fn get_mut_sq(&mut self) -> &mut T { &mut self.0 }\n | ^^^^^^\n\n"}
[00:59:39] {"message":"trait bounds other than `Sized` on const fn parameters are unstable","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs","byte_start":3367,"byte_end":3368,"line_start":88,"line_end":88,"column_start":16,"column_end":17,"is_primary":true,"text":[{"text":"const fn foo11<T: std::fmt::Display>(t: T) -> T { t }","highlight_start":16,"highlight_end":17}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: trait bounds other than `Sized` on const fn parameters are unstable\n --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:88:16\n |\nLL | const fn foo11<T: std::fmt::Display>(t: T) -> T { t }\n | ^\n\n"}
[00:59:39] {"message":"trait bounds other than `Sized` on const fn parameters are unstable","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs","byte_start":3502,"byte_end":3503,"line_start":90,"line_end":90,"column_start":18,"column_end":19,"is_primary":true,"text":[{"text":"const fn foo11_2<T: Send>(t: T) -> T { t }","highlight_start":18,"highlight_end":19}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: trait bounds other than `Sized` on const fn parameters are unstable\n --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:90:18\n |\nLL | const fn foo11_2<T: Send>(t: T) -> T { t }\n | ^\n\n"}
[00:59:39] {"message":"only int, `bool` and `char` operations are stable in const fn","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs","byte_start":3639,"byte_end":3646,"line_start":92,"line_end":92,"column_start":33,"column_end":40,"is_primary":true,"text":[{"text":"const fn foo19(f: f32) -> f32 { f * 2.0 }","highlight_start":33,"highlight_end":40}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: only int, `bool` and `char` operations are stable in const fn\n --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:92:33\n |\nLL | const fn foo19(f: f32) -> f32 { f * 2.0 }\n | ^^^^^^^\n\n"}
[00:59:39] {"message":"only int, `bool` and `char` operations are stable in const fn","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs","byte_start":3756,"byte_end":3763,"line_start":94,"line_end":94,"column_start":35,"column_end":42,"is_primary":true,"text":[{"text":"const fn foo19_2(f: f32) -> f32 { 2.0 - f }","highlight_start":35,"highlight_end":42}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: only int, `bool` and `char` operations are stable in const fn\n --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:94:35\n |\nLL | const fn foo19_2(f: f32) -> f32 { 2.0 - f }\n | ^^^^^^^\n\n"}
[00:59:39] {"message":"only int and `bool` operations are stable in const fn","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs","byte_start":3873,"byte_end":3875,"line_start":96,"line_end":96,"column_start":35,"column_end":37,"is_primary":true,"text":[{"text":"const fn foo19_3(f: f32) -> f32 { -f }","highlight_start":35,"highlight_end":37}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: only int and `bool` operations are stable in const fn\n --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:96:35\n |\nLL | const fn foo19_3(f: f32) -> f32 { -f }\n | ^^\n\n"}
[00:59:39] {"message":"only int, `bool` and `char` operations are stable in const fn","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs","byte_start":3985,"byte_end":3990,"line_start":98,"line_end":98,"column_start":43,"column_end":48,"is_primary":true,"text":[{"text":"const fn foo19_4(f: f32, g: f32) -> f32 { f / g }","highlight_start":43,"highlight_end":48}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: only int, `bool` and `char` operations are stable in const fn\n --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:98:43\n |\nLL | const fn foo19_4(f: f32, g: f32) -> f32 { f / g }\n | ^^^^^\n\n"}
[00:59:39] {"message":"cannot access `static` items in const fn","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs","byte_start":4115,"byte_end":4118,"line_start":102,"line_end":102,"column_start":27,"column_end":30,"is_primary":true,"text":[{"text":"const fn foo25() -> u32 { BAR } //~ ERROR cannot access `static` items in const fn","highlight_start":27,"highlight_end":30}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: cannot access `static` items in const fn\n --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:102:27\n |\nLL | const fn foo25() -> u32 { BAR } //~ ERROR cannot access `static` items in const fn\n | ^^^\n\n"}
[00:59:39] {"message":"cannot access `static` items in const fn","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs","byte_start":4207,"byte_end":4211,"line_start":103,"line_end":103,"column_start":36,"column_end":40,"is_primary":true,"text":[{"text":"const fn foo26() -> &'static u32 { &BAR } //~ ERROR cannot access `static` items","highlight_start":36,"highlight_end":40}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: cannot access `static` items in const fn\n --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:103:36\n |\nLL | const fn foo26() -> &'static u32 { &BAR } //~ ERROR cannot access `static` items\n | ^^^^\n\n"}
[00:59:39] {"message":"casting pointers to ints is unstable in const fn","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs","byte_start":4294,"byte_end":4304,"line_start":104,"line_end":104,"column_start":42,"column_end":52,"is_primary":true,"text":[{"text":"const fn foo30(x: *const u32) -> usize { x as usize }","highlight_start":42,"highlight_end":52}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: casting pointers to ints is unstable in const fn\n --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:104:42\n |\nLL | const fn foo30(x: *const u32) -> usize { x as usize }\n | ^^^^^^^^^^\n\n"}
[00:59:39] {"message":"casting pointers to ints is unstable in const fn","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs","byte_start":4383,"byte_end":4393,"line_start":106,"line_end":106,"column_start":42,"column_end":52,"is_primary":true,"text":[{"text":"const fn foo30_2(x: *mut u32) -> usize { x as usize }","highlight_start":42,"highlight_end":52}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: casting pointers to ints is unstable in const fn\n --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:106:42\n |\nLL | const fn foo30_2(x: *mut u32) -> usize { x as usize }\n | ^^^^^^^^^^\n\n"}
[00:59:39] {"message":"`if`, `match`, `&&` and `||` are not stable in const fn","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs","byte_start":4468,"byte_end":4490,"line_start":108,"line_end":108,"column_start":38,"column_end":60,"is_primary":true,"text":[{"text":"const fn foo30_4(b: bool) -> usize { if b { 1 } else { 42 } }","highlight_start":38,"highlight_end":60}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: `if`, `match`, `&&` and `||` are not stable in const fn\n --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:108:38\n |\nLL | const fn foo30_4(b: bool) -> usize { if b { 1 } else { 42 } }\n | ^^^^^^^^^^^^^^^^^^^^^^\n\n"}
[00:59:39] {"message":"`if`, `match`, `&&` and `||` are not stable in const fn","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs","byte_start":4588,"byte_end":4599,"line_start":110,"line_end":110,"column_start":29,"column_end":40,"is_primary":true,"text":[{"text":"const fn foo30_5(b: bool) { while b { } } //~ ERROR not stable in const fn","highlight_start":29,"highlight_end":40}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: `if`, `match`, `&&` and `||` are not stable in const fn\n --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:110:29\n |\nLL | const fn foo30_5(b: bool) { while b { } } //~ ERROR not stable in const fn\n | ^^^^^^^^^^^\n\n"}
[00:59:39] {"message":"local variables in const fn are unstable","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs","byte_start":4668,"byte_end":4669,"line_start":111,"line_end":111,"column_start":34,"column_end":35,"is_primary":true,"text":[{"text":"const fn foo30_6() -> bool { let x = true; x } //~ ERROR local variables in const fn are unstable","highlight_start":34,"highlight_end":35}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: local variables in const fn are unstable\n --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:111:34\n |\nLL | const fn foo30_6() -> bool { let x = true; x } //~ ERROR local variables in const fn are unstable\n | ^\n\n"}
[00:59:39] {"message":"`if`, `match`, `&&` and `||` are not stable in const fn","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs","byte_start":4776,"byte_end":4782,"line_start":112,"line_end":112,"column_start":44,"column_end":50,"is_primary":true,"text":[{"text":"const fn foo36(a: bool, b: bool) -> bool { a && b }","highlight_start":44,"highlight_end":50}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: `if`, `match`, `&&` and `||` are not stable in const fn\n --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:112:44\n |\nLL | const fn foo36(a: bool, b: bool) -> bool { a && b }\n | ^^^^^^\n\n"}
[00:59:39] {"message":"`if`, `match`, `&&` and `||` are not stable in const fn","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs","byte_start":4895,"byte_end":4901,"line_start":114,"line_end":114,"column_start":44,"column_end":50,"is_primary":true,"text":[{"text":"const fn foo37(a: bool, b: bool) -> bool { a || b }","highlight_start":44,"highlight_end":50}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: `if`, `match`, `&&` and `||` are not stable in const fn\n --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:114:44\n |\nLL | const fn foo37(a: bool, b: bool) -> bool { a || b }\n | ^^^^^^\n\n"}
[00:59:39] {"message":"mutable references in const fn are unstable","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs","byte_start":4984,"byte_end":4985,"line_start":116,"line_end":116,"column_start":14,"column_end":15,"is_primary":true,"text":[{"text":"const fn inc(x: &mut i32) { *x += 1 }","highlight_start":14,"highlight_end":15}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: mutable references in const fn are unstable\n --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:116:14\n |\nLL | const fn inc(x: &mut i32) { *x += 1 }\n | ^\n\n"}
[00:59:39] {"message":"trait bounds other than `Sized` on const fn parameters are unstable","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs","byte_start":5084,"byte_end":5085,"line_start":121,"line_end":121,"column_start":6,"column_end":7,"is_primary":true,"text":[{"text":"impl<T: std::fmt::Debug> Foo<T> {","highlight_start":6,"highlight_end":7}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: trait bounds other than `Sized` on const fn parameters are unstable\n --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:121:6\n |\nLL | impl<T: std::fmt::Debug> Foo<T> {\n | ^\n\n"}
[00:59:39] {"message":"trait bounds other than `Sized` on const fn parameters are unstable","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs","byte_start":5227,"byte_end":5228,"line_start":126,"line_end":126,"column_start":6,"column_end":7,"is_primary":true,"text":[{"text":"impl<T: std::fmt::Debug + Sized> Foo<T> {","highlight_start":6,"highlight_end":7}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: trait bounds other than `Sized` on const fn parameters are unstable\n --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:126:6\n |\nLL | impl<T: std::fmt::Debug + Sized> Foo<T> {\n | ^\n\n"}
[00:59:39] {"message":"trait bounds other than `Sized` on const fn parameters are unstable","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs","byte_start":5379,"byte_end":5380,"line_start":131,"line_end":131,"column_start":6,"column_end":7,"is_primary":true,"text":[{"text":"impl<T: Sync + Sized> Foo<T> {","highlight_start":6,"highlight_end":7}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: trait bounds other than `Sized` on const fn parameters are unstable\n --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:131:6\n |\nLL | impl<T: Sync + Sized> Foo<T> {\n | ^\n\n"}
[00:59:39] {"message":"`impl Trait` in const fn is unstable","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs","byte_start":5563,"byte_end":5595,"line_start":137,"line_end":137,"column_start":24,"column_end":56,"is_primary":true,"text":[{"text":"const fn no_rpit2() -> AlanTuring<impl std::fmt::Debug> { AlanTuring(0) }","highlight_start":24,"highlight_end":56}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: `impl Trait` in const fn is unstable\n --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:137:24\n |\nLL | const fn no_rpit2() -> AlanTuring<impl std::fmt::Debug> { AlanTuring(0) }\n | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n\n"}
[00:59:39] {"message":"trait bounds other than `Sized` on const fn parameters are unstable","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs","byte_start":5695,"byte_end":5715,"line_start":139,"line_end":139,"column_start":34,"column_end":54,"is_primary":true,"text":[{"text":"const fn no_apit2(_x: AlanTuring<impl std::fmt::Debug>) {}","highlight_start":34,"highlight_end":54}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: trait bounds other than `Sized` on const fn parameters are unstable\n --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:139:34\n |\nLL | const fn no_apit2(_x: AlanTuring<impl std::fmt::Debug>) {}\n | ^^^^^^^^^^^^^^^^^^^^\n\n"}
[00:59:39] {"message":"trait bounds other than `Sized` on const fn parameters are unstable","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs","byte_start":5785,"byte_end":5805,"line_start":141,"line_end":141,"column_start":22,"column_end":42,"is_primary":true,"text":[{"text":"const fn no_apit(_x: impl std::fmt::Debug) {} //~ ERROR trait bounds other than `Sized`","highlight_start":22,"highlight_end":42}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: trait bounds other than `Sized` on const fn parameters are unstable\n --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:141:22\n |\nLL | const fn no_apit(_x: impl std::fmt::Debug) {} //~ ERROR trait bounds other than `Sized`\n | ^^^^^^^^^^^^^^^^^^^^\n\n"}
[00:59:39] {"message":"`impl Trait` in const fn is unstable","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs","byte_start":5874,"byte_end":5894,"line_start":142,"line_end":142,"column_start":23,"column_end":43,"is_primary":true,"text":[{"text":"const fn no_rpit() -> impl std::fmt::Debug {} //~ ERROR `impl Trait` in const fn is unstable","highlight_start":23,"highlight_end":43}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: `impl Trait` in const fn is unstable\n --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:142:23\n |\nLL | const fn no_rpit() -> impl std::fmt::Debug {} //~ ERROR `impl Trait` in const fn is unstable\n | ^^^^^^^^^^^^^^^^^^^^\n\n"}
[00:59:39] {"message":"trait bounds other than `Sized` on const fn parameters are unstable","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs","byte_start":5967,"byte_end":5969,"line_start":143,"line_end":143,"column_start":23,"column_end":25,"is_primary":true,"text":[{"text":"const fn no_dyn_trait(_x: &dyn std::fmt::Debug) {} //~ ERROR trait bounds other than `Sized`","highlight_start":23,"highlight_end":25}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: trait bounds other than `Sized` on const fn parameters are unstable\n --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:143:23\n |\nLL | const fn no_dyn_trait(_x: &dyn std::fmt::Debug) {} //~ ERROR trait bounds other than `Sized`\n | ^^\n\n"}
[00:59:39] {"message":"trait bounds other than `Sized` on const fn parameters are unstable","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs","byte_start":6069,"byte_end":6097,"line_start":144,"line_end":144,"column_start":32,"column_end":60,"is_primary":true,"text":[{"text":"const fn no_dyn_trait_ret() -> &'static dyn std::fmt::Debug { &() }","highlight_start":32,"highlight_end":60}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: trait bounds other than `Sized` on const fn parameters are unstable\n --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:144:32\n |\nLL | const fn no_dyn_trait_ret() -> &'static dyn std::fmt::Debug { &() }\n | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n\n"}
[00:59:39] {"message":"temporary value dropped while borrowed","code":{"code":"E0716","explanation":"\nThis error indicates that a temporary value is being dropped\nwhile a borrow is still in active use.\n\nErroneous code example:\n\n```compile_fail,E0716\n# #![feature(nll)]\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet p = bar(&foo());\n // ------ creates a temporary\nlet q = *p;\n```\n\nHere, the expression `&foo()` is borrowing the expression\n`foo()`. As `foo()` is call to a function, and not the name of\na variable, this creates a **temporary** -- that temporary stores\nthe return value from `foo()` so that it can be borrowed.\nSo you might imagine that `let p = bar(&foo())` is equivalent\nto this:\n\n```compile_fail,E0597\n# fn foo() -> i32 { 22 }\n# fn bar(x: &i32) -> &i32 { x }\nlet p = {\n let tmp = foo(); // the temporary\n bar(&tmp)\n}; // <-- tmp is freed as we exit this block\nlet q = p;\n```\n\nWhenever a temporary is created, it is automatically dropped (freed)\naccording to fixed rules. Ordinarily, the temporary is dropped\nat the end of the enclosing statement -- in this case, after the `let`.\nThis is illustrated in the example above by showing that `tmp` would\nbe freed as we exit the block.\n\nTo fix this problem, you need to create a local variable\nto store the value in rather than relying on a temporary.\nFor example, you might change the original program to\nthe following:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = foo(); // dropped at the end of the enclosing block\nlet p = bar(&value);\nlet q = *p;\n```\n\nBy introducing the explicit `let value`, we allocate storage\nthat will last until the end of the enclosing block (when `value`\ngoes out of scope). When we borrow `&value`, we are borrowing a\nlocal variable that already exists, and hence no temporary is created.\n\nTemporaries are not always dropped at the end of the enclosing\nstatement. In simple cases where the `&` expression is immediately\nstored into a variable, the compiler will automatically extend\nthe lifetime of the temporary until the end of the enclosinb\nblock. Therefore, an alternative way to fix the original\nprogram is to write `let tmp = &foo()` and not `let tmp = foo()`:\n\n```\nfn foo() -> i32 { 22 }\nfn bar(x: &i32) -> &i32 { x }\nlet value = &foo();\nlet p = bar(value);\nlet q = *p;\n```\n\nHere, we are still borrowing `foo()`, but as the borrow is assigned\ndirectly into a variable, the temporary will not be dropped until\nthe end of the enclosing block. Similar rules apply when temporaries\nare stored into aggregate structures like a tuple or struct:\n\n```\n// Here, two temporaries are created, but\n// as they are stored directly into `value`,\n// they are not dropped until the end of the\n// enclosing block.\nfn foo() -> i32 { 22 }\nlet value = (&foo(), &foo());\n```\n"},"level":"error","spans":[{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs","byte_start":6101,"byte_end":6103,"line_start":144,"line_end":144,"column_start":64,"column_end":66,"is_primary":true,"text":[{"text":"const fn no_dyn_trait_ret() -> &'static dyn std::fmt::Debug { &() }","highlight_start":64,"highlight_end":66}],"label":"creates a temporary which is freed while still in use","suggested_replacement":null,"suggestion_applicability":null,"expansion":null},{"file_name":"/checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs","byte_start":6104,"byte_end":6105,"line_start":144,"line_end":144,"column_start":67,"column_end":68,"is_primary":false,"text":[{"text":"const fn no_dyn_trait_ret() -> &'static dyn std::fmt::Debug { &() }","highlight_start":67,"highlight_end":68}],"label":"temporary value is freed at the end of this statement","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"borrowed value must be valid for the static lifetime...","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"error[E0716]: temporary value dropped while borrowed\n --> /checkout/src/test/ui/consts/min_const_fn/min_const_fn.rs:144:64\n |\nLL | const fn no_dyn_trait_ret() -> &'static dyn std::fmt::Debug { &() }\n | ^^ - temporary value is freed at the end of this statement\n | |\n | creates a temporary which is freed while still in use\n |\n = note: borrowed value must be valid for the static lifetime...\n\n"}
---
[00:59:39] test result: FAILED. 6706 passed; 34 failed; 88 ignored; 0 measured; 0 filtered out
[00:59:39] [00:59:39] [00:59:39] [00:59:39] command did not execute successfully: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-tools-bin/compiletest" "--compile-lib-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/lib" "--run-lib-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/lib/rustlib/x86_64-unknown-linux-gnu/lib" "--rustc-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "--src-base" "/checkout/src/test/ui" "--build-base" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui" "--stage-id" "stage2-x86_64-unknown-linux-gnu" "--mode" "ui" "--target" "x86_64-unknown-linux-gnu" "--host" "x86_64-unknown-linux-gnu" "--llvm-filecheck" "/usr/lib/llvm-5.0/bin/FileCheck" "--host-rustcflags" "-Crpath -O -Zunstable-options " "--target-rustcflags" "-Crpath -O -Zunstable-options -Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "--docck-python" "/usr/bin/python2.7" "--lldb-python" "/usr/bin/python2.7" "--gdb" "/usr/bin/gdb" "--quiet" "--llvm-version" "5.0.0\n" "--system-llvm" "--cc" "" "--cxx" "" "--cflags" "" "--llvm-components" "" "--llvm-cxxflags" "" "--adb-path" "adb" "--adb-test-dir" "/data/tmp/work" "--android-cross-path" "" "--color" "always" "--compare-mode" "nll"
[00:59:39] [00:59:39] [00:59:39] failed to run: /checkout/obj/build/bootstrap/debug/bootstrap test
[00:59:39] Build completed unsuccessfully in 0:14:06
[00:59:39] Build completed unsuccessfully in 0:14:06
[00:59:39] Makefile:58: recipe for target 'check' failed
The command "stamp sh -x -c "$RUN_SCRIPT"" exited with 2.
travis_time:start:04c1d47e
$ date && (curl -fs --head https://google.com | grep ^Date: | sed 's/Date: //g' || true)
---
travis_time:end:09542f06:start=1537888319737880385,finish=1537888319742377923,duration=4497538
travis_fold:end:after_failure.3
travis_fold:start:after_failure.4
travis_time:start:11b4d87e
$ ln -s . checkout && for CORE in obj/cores/core.*; do EXE=$(echo $CORE | sed 's|obj/cores/core\.[0-9]*\.!checkout!\(.*\)|\1|;y|!|/|'); if [ -f "$EXE" ]; then printf travis_fold":start:crashlog\n\033[31;1m%s\033[0m\n" "$CORE"; gdb --batch -q -c "$CORE" "$EXE" -iex 'set auto-load off' -iex 'dir src/' -iex 'set sysroot .' -ex bt -ex q; echo travis_fold":"end:crashlog; fi; done || true

I'm a bot! I can only do what humans tell me to, so if this was not helpful or you have suggestions for improvements, please ping or otherwise contact @TimNN. (Feature Requests)

[pnkfelix]

@bors r+

[bors]

📌 Commit 2af199d has been approved by pnkfelix

[bors]

⌛ Testing commit 2af199d with merge 0b2eae7...

[bors]

☀️ Test successful - status-appveyor, status-travis
Approved by: pnkfelix
Pushing 0b2eae7 to master...