correctly normalize constants by lcnr · Pull Request #70319 · rust-lang/rust

lcnr · 2020-03-23T14:51:43Z

closes#70317

implements #70125 (comment)

r? eddyb cc @varkor

rust-highfive · 2020-03-23T14:51:47Z

r? @petrochenkov

(rust_highfive has picked a reviewer for you, use r? to override)

lcnr · 2020-03-23T14:52:34Z

r? @eddyb

lcnr · 2020-03-23T14:56:35Z

currently causes `compiler_builtins to fail at https://github.com/rust-lang/compiler-builtins/blob/3e6327aa59214133fa74b3c51743b5ebde39526f/src/int/mod.rs#L50

error: internal compiler error: src/librustc_mir/monomorphize/collector.rs:603: collection encountered polymorphic constant
--> /home/programming/.cargo/registry/src/github.com-1ecc6299db9ec823/compiler_builtins-0.1.25/src/int/mod.rs:50:5
|
50 | const ONE: Self;
| ^^^^^^^^^^^^^^^^
thread 'rustc' panicked at 'Box<Any>', <::std::macros::panic macros>:2:4
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
note: the compiler unexpectedly panicked. this is a bug.

Which I don't quite understand...

rust-highfive · 2020-03-23T15:19:45Z

The job mingw-check of your PR failed (pretty log, raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

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2020-03-23T14:52:17.2433341Z ========================== Starting Command Output ===========================
2020-03-23T14:52:17.2438548Z [command]/bin/bash --noprofile --norc /home/vsts/work/_temp/62529456-3480-471f-86e8-f4847b27e0e0.sh
2020-03-23T14:52:17.2439082Z 2020-03-23T14:52:17.2444663Z ##[section]Finishing: Disable git automatic line ending conversion
2020-03-23T14:52:17.2464836Z ##[section]Starting: Checkout rust-lang/rust@refs/pull/70319/merge to s
2020-03-23T14:52:17.2468100Z Task : Get sources
2020-03-23T14:52:17.2468412Z Description : Get sources from a repository. Supports Git, TfsVC, and SVN repositories.
2020-03-23T14:52:17.2468712Z Version : 1.0.0
2020-03-23T14:52:17.2468932Z Author : Microsoft
---
2020-03-23T14:52:18.2338220Z ##[command]git remote add origin https://github.com/rust-lang/rust
2020-03-23T14:52:18.2344929Z ##[command]git config gc.auto 0
2020-03-23T14:52:18.2349969Z ##[command]git config --get-all http.https://github.com/rust-lang/rust.extraheader
2020-03-23T14:52:18.2355448Z ##[command]git config --get-all http.proxy
2020-03-23T14:52:18.2362995Z ##[command]git -c http.extraheader="AUTHORIZATION: basic ***" fetch --force --tags --prune --progress --no-recurse-submodules --depth=2 origin +refs/heads/*:refs/remotes/origin/* +refs/pull/70319/merge:refs/remotes/pull/70319/merge
---
2020-03-23T15:00:31.1042196Z configure: build.locked-deps := True
2020-03-23T15:00:31.1042502Z configure: llvm.ccache := sccache
2020-03-23T15:00:31.1043007Z configure: build.cargo-native-static := True
2020-03-23T15:00:31.1043472Z configure: dist.missing-tools := True
2020-03-23T15:00:31.1044144Z configure: build.configure-args := ['--enable-sccache', '--disable-manage-submodu ...
2020-03-23T15:00:31.1044713Z configure: writing `config.toml` in current directory
2020-03-23T15:00:31.1044960Z configure: 2020-03-23T15:00:31.1045392Z configure: run `python /checkout/x.py --help`
2020-03-23T15:00:31.1045624Z configure: ---
2020-03-23T15:07:55.4420291Z skip untracked path cpu-usage.csv during rustfmt invocations
2020-03-23T15:07:55.4425441Z skip untracked path src/doc/book/ during rustfmt invocations
2020-03-23T15:07:55.4429910Z skip untracked path src/doc/rust-by-example/ during rustfmt invocations
2020-03-23T15:07:55.4434625Z skip untracked path src/llvm-project/ during rustfmt invocations
2020-03-23T15:07:58.5455029Z Diff in /checkout/src/librustc/ty/normalize_erasing_regions.rs at line 94:
2020-03-23T15:07:58.5455590Z 2020-03-23T15:07:58.5457169Z fn fold_ty(&mut self, ty: Ty<'tcx>) -> Ty<'tcx> {
2020-03-23T15:07:58.5457169Z fn fold_ty(&mut self, ty: Ty<'tcx>) -> Ty<'tcx> {
2020-03-23T15:07:58.5457930Z - self.tcx.normalize_generic_arg_after_erasing_regions(self.param_env.and(GenericArg::from(ty))).expect_ty()
2020-03-23T15:07:58.5458334Z + self.tcx
2020-03-23T15:07:58.5458734Z + .normalize_generic_arg_after_erasing_regions(self.param_env.and(GenericArg::from(ty)))
2020-03-23T15:07:58.5459139Z + .expect_ty()
2020-03-23T15:07:58.5459438Z 2020-03-23T15:07:58.5459438Z 2020-03-23T15:07:58.5459974Z fn fold_const(&mut self, c: &'tcx ty::Const<'tcx>) -> &'tcx ty::Const<'tcx> {
2020-03-23T15:07:58.5460411Z Diff in /checkout/src/librustc/ty/normalize_erasing_regions.rs at line 101:
2020-03-23T15:07:58.5461143Z - self.tcx.normalize_generic_arg_after_erasing_regions(self.param_env.and(GenericArg::from(c))).expect_const()
2020-03-23T15:07:58.5461555Z + self.tcx
2020-03-23T15:07:58.5461915Z + .normalize_generic_arg_after_erasing_regions(self.param_env.and(GenericArg::from(c)))
2020-03-23T15:07:58.5462295Z + .expect_const()
2020-03-23T15:07:58.5462618Z }
2020-03-23T15:07:58.5462737Z 2020-03-23T15:07:58.5462737Z 2020-03-23T15:07:58.5463655Z Running `"/checkout/obj/build/x86_64-unknown-linux-gnu/stage0/bin/rustfmt" "--config-path" "/checkout" "--edition" "2018" "--unstable-features" "--skip-children" "--check" "/checkout/src/librustc/ty/normalize_erasing_regions.rs"` failed.
2020-03-23T15:07:58.5464639Z If you're running `tidy`, try again with `--bless` flag. Or, you just want to format code, run `./x.py fmt` instead.
2020-03-23T15:07:58.5479595Z Build completed unsuccessfully in 0:00:39
2020-03-23T15:07:58.5527249Z == clock drift check ==
2020-03-23T15:07:58.5548908Z local time: Mon Mar 23 15:07:58 UTC 2020
2020-03-23T15:07:58.8433414Z network time: Mon, 23 Mar 2020 15:07:58 GMT
2020-03-23T15:07:58.8433414Z network time: Mon, 23 Mar 2020 15:07:58 GMT
2020-03-23T15:07:58.8437368Z == end clock drift check ==
2020-03-23T15:08:00.3979893Z 2020-03-23T15:08:00.4047088Z ##[error]Bash exited with code '1'.
2020-03-23T15:08:00.4060656Z ##[section]Finishing: Run build
2020-03-23T15:08:00.4110830Z ##[section]Starting: Checkout rust-lang/rust@refs/pull/70319/merge to s
2020-03-23T15:08:00.4116096Z Task : Get sources
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2020-03-23T15:08:00.4116781Z Version : 1.0.0
2020-03-23T15:08:00.4117008Z Author : Microsoft
2020-03-23T15:08:00.4117008Z Author : Microsoft
2020-03-23T15:08:00.4117385Z Help : [More Information](https://go.microsoft.com/fwlink/?LinkId=798199)
2020-03-23T15:08:00.4117798Z ==============================================================================
2020-03-23T15:08:00.7509213Z Cleaning any cached credential from repository: rust-lang/rust (GitHub)
2020-03-23T15:08:00.7575040Z ##[section]Finishing: Checkout rust-lang/rust@refs/pull/70319/merge to s
2020-03-23T15:08:00.7669169Z Cleaning up task key
2020-03-23T15:08:00.7670578Z Start cleaning up orphan processes.
2020-03-23T15:08:00.7869752Z Terminate orphan process: pid (3423) (python)
2020-03-23T15:08:00.8190972Z ##[section]Finishing: Finalize Job

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lcnr · 2020-03-23T17:27:19Z

this now also implements visit_const in the two cases mentioned in #70317 in the first commit.

If desired I can move that commit into different PR

rust-highfive · 2020-03-23T17:37:00Z

The job mingw-check of your PR failed (pretty log, raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

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2020-03-23T17:28:18.3530372Z ========================== Starting Command Output ===========================
2020-03-23T17:28:18.3534721Z [command]/bin/bash --noprofile --norc /home/vsts/work/_temp/db39795a-0bf8-4cb4-a8b5-315aabe34469.sh
2020-03-23T17:28:18.3535195Z 2020-03-23T17:28:18.3540612Z ##[section]Finishing: Disable git automatic line ending conversion
2020-03-23T17:28:18.3563589Z ##[section]Starting: Checkout rust-lang/rust@refs/pull/70319/merge to s
2020-03-23T17:28:18.3566844Z Task : Get sources
2020-03-23T17:28:18.3567152Z Description : Get sources from a repository. Supports Git, TfsVC, and SVN repositories.
2020-03-23T17:28:18.3567451Z Version : 1.0.0
2020-03-23T17:28:18.3567669Z Author : Microsoft
---
2020-03-23T17:28:19.5761496Z ##[command]git remote add origin https://github.com/rust-lang/rust
2020-03-23T17:28:19.5770357Z ##[command]git config gc.auto 0
2020-03-23T17:28:19.5776926Z ##[command]git config --get-all http.https://github.com/rust-lang/rust.extraheader
2020-03-23T17:28:19.5783400Z ##[command]git config --get-all http.proxy
2020-03-23T17:28:19.5792933Z ##[command]git -c http.extraheader="AUTHORIZATION: basic ***" fetch --force --tags --prune --progress --no-recurse-submodules --depth=2 origin +refs/heads/*:refs/remotes/origin/* +refs/pull/70319/merge:refs/remotes/pull/70319/merge
---
2020-03-23T17:34:37.6160199Z Checking rustc_ast_lowering v0.0.0 (/checkout/src/librustc_ast_lowering)
2020-03-23T17:34:38.3614684Z error[E0425]: cannot find value `bound_ty` in this scope
2020-03-23T17:34:38.3615487Z --> src/librustc/traits/structural_impls.rs:280:21
2020-03-23T17:34:38.3616014Z |
2020-03-23T17:34:38.3616621Z 280 | bound_ty.var.as_u32(),
2020-03-23T17:34:38.3622208Z 2020-03-23T17:34:38.3667323Z error[E0425]: cannot find value `bound_ty` in this scope
2020-03-23T17:34:38.3668300Z --> src/librustc/traits/structural_impls.rs:281:52
2020-03-23T17:34:38.3669215Z |
2020-03-23T17:34:38.3669215Z |
2020-03-23T17:34:38.3670043Z 281 | Symbol::intern(&format!("^{}", bound_ty.var.as_u32())),
2020-03-23T17:34:38.3671626Z 2020-03-23T17:34:38.7718115Z error: unused import: `GenericArg`
2020-03-23T17:34:38.7718846Z --> src/librustc/ty/normalize_erasing_regions.rs:11:24
2020-03-23T17:34:38.7719425Z |
2020-03-23T17:34:38.7719425Z |
2020-03-23T17:34:38.7720100Z 11 | use crate::ty::subst::{GenericArg, Subst, SubstsRef};
2020-03-23T17:34:38.7721651Z |
2020-03-23T17:34:38.7722349Z = note: `-D unused-imports` implied by `-D warnings`
2020-03-23T17:34:38.7722634Z 2020-03-23T17:34:38.8052194Z Checking rustc_builtin_macros v0.0.0 (/checkout/src/librustc_builtin_macros)
2020-03-23T17:34:38.8052194Z Checking rustc_builtin_macros v0.0.0 (/checkout/src/librustc_builtin_macros)
2020-03-23T17:34:43.8818921Z error[E0308]: mismatched types
2020-03-23T17:34:43.8821260Z --> src/librustc/traits/structural_impls.rs:279:17
2020-03-23T17:34:43.8822669Z |
2020-03-23T17:34:43.8824165Z 277 | / match c.val {
2020-03-23T17:34:43.8826323Z 278 | | ty::ConstKind::Bound(debruijn, bound_var) if debruijn == self.binder_index => {
2020-03-23T17:34:43.8831544Z 279 | | self.types.insert(
2020-03-23T17:34:43.8832347Z | |_________________^
2020-03-23T17:34:43.8833241Z 280 | || bound_ty.var.as_u32(),
2020-03-23T17:34:43.8834359Z 281 | || Symbol::intern(&format!("^{}", bound_ty.var.as_u32())),
2020-03-23T17:34:43.8835400Z 282 | || )
2020-03-23T17:34:43.8836498Z | ||_________________^ expected `()`, found enum `std::option::Option`
2020-03-23T17:34:43.8838326Z 284 | | _ => (),
2020-03-23T17:34:43.8839111Z 285 | | }
2020-03-23T17:34:43.8839922Z | |_________- expected this to be `()`
2020-03-23T17:34:43.8840575Z |
---
2020-03-23T17:34:48.4042302Z For more information about an error, try `rustc --explain E0308`.
2020-03-23T17:34:48.4326095Z error: could not compile `rustc`.
2020-03-23T17:34:48.4327048Z 2020-03-23T17:34:48.4328153Z To learn more, run the command again with --verbose.
2020-03-23T17:34:48.4370485Z command did not execute successfully: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0/bin/cargo" "check" "--target" "x86_64-unknown-linux-gnu" "-Zbinary-dep-depinfo" "-j" "2" "--release" "--color" "always" "--features" " llvm" "--manifest-path" "/checkout/src/rustc/Cargo.toml" "--message-format" "json-render-diagnostics"
2020-03-23T17:34:48.4384316Z failed to run: /checkout/obj/build/bootstrap/debug/bootstrap check
2020-03-23T17:34:48.4384665Z Build completed unsuccessfully in 0:04:01
2020-03-23T17:34:48.4439747Z == clock drift check ==
2020-03-23T17:34:48.4456890Z local time: Mon Mar 23 17:34:48 UTC 2020
2020-03-23T17:34:48.4456890Z local time: Mon Mar 23 17:34:48 UTC 2020
2020-03-23T17:34:48.6074758Z network time: Mon, 23 Mar 2020 17:34:48 GMT
2020-03-23T17:34:48.6081872Z == end clock drift check ==
2020-03-23T17:34:49.2517558Z 2020-03-23T17:34:49.2585618Z ##[error]Bash exited with code '1'.
2020-03-23T17:34:49.2599129Z ##[section]Finishing: Run build
2020-03-23T17:34:49.2653079Z ##[section]Starting: Checkout rust-lang/rust@refs/pull/70319/merge to s
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2020-03-23T17:34:49.2658769Z Version : 1.0.0
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2020-03-23T17:34:49.2658993Z Author : Microsoft
2020-03-23T17:34:49.2659360Z Help : [More Information](https://go.microsoft.com/fwlink/?LinkId=798199)
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2020-03-23T17:34:49.6049698Z ##[section]Finishing: Checkout rust-lang/rust@refs/pull/70319/merge to s
2020-03-23T17:34:49.6141821Z Cleaning up task key
2020-03-23T17:34:49.6143140Z Start cleaning up orphan processes.
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rust-highfive · 2020-03-23T18:09:21Z

The job x86_64-gnu-llvm-7 of your PR failed (pretty log, raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

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2020-03-23T17:40:33.1751710Z ========================== Starting Command Output ===========================
2020-03-23T17:40:33.1754355Z [command]/bin/bash --noprofile --norc /home/vsts/work/_temp/d621a36c-6c80-4461-9140-a216c82fdc8a.sh
2020-03-23T17:40:33.1754615Z 2020-03-23T17:40:33.1757923Z ##[section]Finishing: Disable git automatic line ending conversion
2020-03-23T17:40:33.1778226Z ##[section]Starting: Checkout rust-lang/rust@refs/pull/70319/merge to s
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2020-03-23T17:40:33.1782474Z Version : 1.0.0
2020-03-23T17:40:33.1782668Z Author : Microsoft
---
2020-03-23T17:40:34.3692275Z ##[command]git remote add origin https://github.com/rust-lang/rust
2020-03-23T17:40:34.3699938Z ##[command]git config gc.auto 0
2020-03-23T17:40:34.3704756Z ##[command]git config --get-all http.https://github.com/rust-lang/rust.extraheader
2020-03-23T17:40:34.3715507Z ##[command]git config --get-all http.proxy
2020-03-23T17:40:34.3725619Z ##[command]git -c http.extraheader="AUTHORIZATION: basic ***" fetch --force --tags --prune --progress --no-recurse-submodules --depth=2 origin +refs/heads/*:refs/remotes/origin/* +refs/pull/70319/merge:refs/remotes/pull/70319/merge
---
2020-03-23T18:08:56.2044002Z Compiling unwind v0.0.0 (/checkout/src/libunwind)
2020-03-23T18:08:57.0849704Z Compiling backtrace-sys v0.1.34
2020-03-23T18:08:57.9951335Z Compiling hashbrown v0.6.2
2020-03-23T18:09:07.4118451Z Compiling rustc-std-workspace-core v1.99.0 (/checkout/src/tools/rustc-std-workspace-core)
2020-03-23T18:09:08.7194763Z error: internal compiler error: src/librustc_mir/monomorphize/collector.rs:603: collection encountered polymorphic constant
2020-03-23T18:09:08.7195917Z --> /cargo/registry/src/github.com-1ecc6299db9ec823/compiler_builtins-0.1.25/src/int/mod.rs:50:5
2020-03-23T18:09:08.7197827Z 50 | const ONE: Self;
2020-03-23T18:09:08.7198528Z | ^^^^^^^^^^^^^^^^
2020-03-23T18:09:08.7231945Z 2020-03-23T18:09:08.7233617Z thread 'rustc' panicked at 'Box<Any>', <::std::macros::panic macros>:2:4
2020-03-23T18:09:08.7233617Z thread 'rustc' panicked at 'Box<Any>', <::std::macros::panic macros>:2:4
2020-03-23T18:09:08.7234073Z note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
2020-03-23T18:09:08.7234349Z 2020-03-23T18:09:08.7234579Z note: the compiler unexpectedly panicked. this is a bug.
2020-03-23T18:09:08.7234805Z 2020-03-23T18:09:08.7235566Z note: we would appreciate a bug report: ***/blob/master/CONTRIBUTING.md#bug-reports
2020-03-23T18:09:08.7235880Z 2020-03-23T18:09:08.7236410Z note: rustc 1.44.0-nightly (fca83592d 2020-03-23) running on x86_64-unknown-linux-gnu
2020-03-23T18:09:08.7236673Z 2020-03-23T18:09:08.7237770Z note: compiler flags: -Z macro-backtrace -Z binary-dep-depinfo -Z force-unstable-if-unmarked -C opt-level=3 -C codegen-units=1 -C debuginfo=0 -C link-args=-Wl,-rpath,$ORIGIN/../lib -C prefer-dynamic -C llvm-args=-import-instr-limit=10 -C panic=abort -C debug-assertions=no --crate-type lib
2020-03-23T18:09:08.7238670Z note: some of the compiler flags provided by cargo are hidden
2020-03-23T18:09:08.7238885Z 2020-03-23T18:09:08.7239362Z error: aborting due to previous error
2020-03-23T18:09:08.7239614Z ---
2020-03-23T18:09:14.3195206Z local time: Mon Mar 23 18:09:14 UTC 2020
2020-03-23T18:09:14.3990374Z network time: Mon, 23 Mar 2020 18:09:14 GMT
2020-03-23T18:09:14.3990903Z == end clock drift check ==
2020-03-23T18:09:16.7215001Z 2020-03-23T18:09:16.7305542Z ##[error]Bash exited with code '1'.
2020-03-23T18:09:16.7319911Z ##[section]Finishing: Run build
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2020-03-23T18:09:17.1041913Z ##[section]Finishing: Checkout rust-lang/rust@refs/pull/70319/merge to s
2020-03-23T18:09:17.1134155Z Cleaning up task key
2020-03-23T18:09:17.1135473Z Start cleaning up orphan processes.
2020-03-23T18:09:17.1332189Z Terminate orphan process: pid (4494) (python)
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lcnr · 2020-03-23T18:46:08Z

@eddyb this should now close #70317 afaict.

It still does not fix the following though. So we might just
merge this without actually having any new tests.

#![feature(const_generics)]structS;implS{fntest<constA:i32>() -> i32{A}}fnmain(){S::test::<{16i32}>();}

eddyb · 2020-03-24T17:34:10Z

@bors r+

bors · 2020-03-24T17:34:11Z

📌 Commit 11763d4 has been approved by eddyb

@varkor

correctly normalize constants closesrust-lang#70317 implements rust-lang#70125 (comment) r? eddyb cc @varkor

Centril · 2020-03-24T20:31:34Z

Failed in #70363 (comment), @bors r-

lcnr · 2020-03-24T20:44:26Z

seems like the representation of RawVec in mir was changed in another PR.

Will wait for #70371 to get merged first

wesleywiser · 2020-03-24T21:19:43Z

I think the issue is differences between 32-bit and 64-bit platforms:

Actual Line: " ((*_4).0: alloc::raw_vec::RawVec<u32>) = const ByRef { alloc: Allocation { bytes: [4, 0, 0, 0, 0, 0, 0, 0], relocations: Relocations(SortedMap { data: [] }), undef_mask: UndefMask { blocks: [255], len: Size { raw: 8 } }, size: Size { raw: 8 }, align: Align { pow2: 2 }, mutability: Not, extra: () }, offset: Size { raw: 0 } }: alloc::raw_vec::RawVec::<u32>;"
Expected Line: " ((*_4).0: alloc::raw_vec::RawVec<u32>) = const ByRef { alloc: Allocation { bytes: [4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], relocations: Relocations(SortedMap { data: [] }), undef_mask: UndefMask { blocks: [65535], len: Size { raw: 16 } }, size: Size { raw: 16 }, align: Align { pow2: 3 }, mutability: Not, extra: () }, offset: Size { raw: 0 } }: alloc::raw_vec::RawVec::<u32>;"

The failure happened on Linux dist-i586-gnu-i586-i686-musl.

@oli-obk Is there a nice way to deal with differences like this on 32-vs-64 bit platforms in mir-opt tests? Or should we just make this a 64-bit only test?

eddyb · 2020-03-24T21:24:57Z

@wesleywiser see #69916.

oli-obk · 2020-03-25T14:02:24Z

Make it 64 bit for now and when we move to --bless we can make it a test for both platforms

lcnr · 2020-03-25T15:08:31Z

updated the test to only run on 64 bit machines, should be ready for merge again. 😅

oli-obk · 2020-03-25T15:16:53Z

@bors r=eddyb

bors · 2020-03-25T15:16:54Z

📌 Commit f8e3da5 has been approved by eddyb

@varkor

correctly normalize constants closesrust-lang#70317 implements rust-lang#70125 (comment) r? eddyb cc @varkor

@varkor

correctly normalize constants closesrust-lang#70317 implements rust-lang#70125 (comment) r? eddyb cc @varkor

@ghost

Rollup of 5 pull requests Successful merges: - rust-lang#70226 (use checked casts and arithmetic in Miri engine) - rust-lang#70319 (correctly normalize constants) - rust-lang#70352 (Add long error explanation for E0710 ) - rust-lang#70366 (Implement Fuse with Option) - rust-lang#70379 (fix incorrect type name in doc comments) Failed merges: - rust-lang#70375 (avoid catching InterpError) r? @ghost

rust-highfive assigned petrochenkov Mar 23, 2020

rust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Mar 23, 2020

rust-highfive assigned eddyb and unassigned petrochenkov Mar 23, 2020

lcnr commented Mar 23, 2020
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Comment threadsrc/librustc/query/mod.rs Outdated