Fix off by one in treat err as bug by spastorino · Pull Request #71489 · rust-lang/rust

spastorino · 2020-04-23T21:43:56Z

-Ztreat-err-as-bug doesn't work properly with delay_span_bug.

spastorino · 2020-04-24T04:26:02Z

@eddyb this is ready to review. Unsure if you prefer this strategy or avoid calling treat_err_as_bug from delay_span_bug.

Anyway this seems a bit fragile IMO.

rust-highfive · 2020-04-24T05:49:30Z

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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2020-04-24T04:05:41.0626124Z ========================== Starting Command Output ===========================
2020-04-24T04:05:41.0630245Z [command]/bin/bash --noprofile --norc /home/vsts/work/_temp/b802dfc6-53c1-4ecb-8236-f1be4dcec776.sh
2020-04-24T04:05:41.0630885Z 2020-04-24T04:05:41.0636271Z ##[section]Finishing: Disable git automatic line ending conversion
2020-04-24T04:05:41.0655116Z ##[section]Starting: Checkout rust-lang/rust@refs/pull/71489/merge to s
2020-04-24T04:05:41.0658690Z Task : Get sources
2020-04-24T04:05:41.0658970Z Description : Get sources from a repository. Supports Git, TfsVC, and SVN repositories.
2020-04-24T04:05:41.0659261Z Version : 1.0.0
2020-04-24T04:05:41.0659449Z Author : Microsoft
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2020-04-24T04:05:42.0521485Z ##[command]git remote add origin https://github.com/rust-lang/rust
2020-04-24T04:05:42.0527557Z ##[command]git config gc.auto 0
2020-04-24T04:05:42.0531285Z ##[command]git config --get-all http.https://github.com/rust-lang/rust.extraheader
2020-04-24T04:05:42.0534403Z ##[command]git config --get-all http.proxy
2020-04-24T04:05:42.0541658Z ##[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/71489/merge:refs/remotes/pull/71489/merge
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2020-04-24T04:08:00.8452682Z linux-libc-dev-armel-cross llvm-8 llvm-8-dev llvm-8-runtime llvm-8-tools
2020-04-24T04:08:00.8453187Z make mime-support multiarch-support nodejs openssl patch perl
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2020-04-24T04:08:01.1701757Z 0 upgraded, 151 newly installed, 0 to remove and 0 not upgraded.
2020-04-24T04:08:01.1702625Z Need to get 167 MB of archives.
2020-04-24T04:08:01.1703331Z After this operation, 782 MB of additional disk space will be used.
2020-04-24T04:08:01.1704890Z Get:1 http://archive.ubuntu.com/ubuntu bionic/main amd64 multiarch-support amd64 2.27-3ubuntu1 [6916 B]
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2020-04-24T04:09:02.0516513Z Step 5/8 : ENV RUST_CONFIGURE_ARGS --build=x86_64-unknown-linux-gnu --llvm-root=/usr/lib/llvm-8 --enable-llvm-link-shared --set rust.thin-lto-import-instr-limit=10
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2020-04-24T04:09:06.0649268Z Successfully built 8f4b5ea07222
2020-04-24T04:09:06.0697938Z Successfully tagged rust-ci:latest
2020-04-24T04:09:06.1000498Z Built container sha256:8f4b5ea07222324024945ab1e7bd40d47f777c37de783dd8110aa340ec9010c3
2020-04-24T04:09:06.1020421Z Uploading finished image to https://rust-lang-ci-sccache2.s3.amazonaws.com/docker/01e88a9474ca8c41c36c8a029a6801ef6e4467f6692e430c9b9e402f5cfd9048278b0d8774bfcb209a220c8a74d64668f696c701e8a37663f9dff484d63e08f7
2020-04-24T04:10:03.2653993Z upload failed: - to s3://rust-lang-ci-sccache2/docker/01e88a9474ca8c41c36c8a029a6801ef6e4467f6692e430c9b9e402f5cfd9048278b0d8774bfcb209a220c8a74d64668f696c701e8a37663f9dff484d63e08f7 An error occurred (InvalidAccessKeyId) when calling the CreateMultipartUpload operation: The AWS Access Key Id you provided does not exist in our records.
2020-04-24T04:10:03.8024429Z [CI_JOB_NAME=x86_64-gnu-llvm-8]
2020-04-24T04:10:03.8053639Z == clock drift check ==
2020-04-24T04:10:03.8053639Z == clock drift check ==
2020-04-24T04:10:03.8064947Z local time: Fri Apr 24 04:10:03 UTC 2020
2020-04-24T04:10:04.0976898Z network time: Fri, 24 Apr 2020 04:10:04 GMT
2020-04-24T04:10:04.1005106Z Starting sccache server...
2020-04-24T04:10:04.1939172Z configure: processing command line
2020-04-24T04:10:04.1939553Z configure: 2020-04-24T04:10:04.1940467Z configure: rust.dist-src := False
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---
2020-04-24T05:12:14.7306718Z Suite("src/test/codegen") not skipped for "bootstrap::test::Codegen" -- not in ["src/tools/tidy"]
2020-04-24T05:12:14.7502636Z Check compiletest suite=codegen mode=codegen (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
2020-04-24T05:12:14.9530103Z 2020-04-24T05:12:14.9531028Z running 186 tests
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2020-04-24T05:12:20.5142883Z Suite("src/test/codegen-units") not skipped for "bootstrap::test::CodegenUnits" -- not in ["src/tools/tidy"]
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---
2020-04-24T05:12:22.8211265Z Suite("src/test/assembly") not skipped for "bootstrap::test::Assembly" -- not in ["src/tools/tidy"]
2020-04-24T05:12:22.8412625Z Check compiletest suite=assembly mode=assembly (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
2020-04-24T05:12:23.0053989Z 2020-04-24T05:12:23.0054336Z running 9 tests
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2020-04-24T05:12:23.0056950Z Suite("src/test/incremental") not skipped for "bootstrap::test::Incremental" -- not in ["src/tools/tidy"]
2020-04-24T05:12:23.0251866Z Check compiletest suite=incremental mode=incremental (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
---
2020-04-24T05:12:44.1233727Z Suite("src/test/debuginfo") not skipped for "bootstrap::test::Debuginfo" -- not in ["src/tools/tidy"]
2020-04-24T05:12:44.1458492Z Check compiletest suite=debuginfo mode=debuginfo (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
2020-04-24T05:12:44.3424821Z 2020-04-24T05:12:44.3425184Z running 115 tests
2020-04-24T05:12:58.2766524Z iiiii..i.....i..i...i..i.i.i..i..i..ii....i.i....ii..........iiii.........i.....i..i.......ii.i.ii.. 100/115
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2020-04-24T05:12:59.3504121Z Uplifting stage1 rustc (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
---
2020-04-24T05:24:34.3873377Z warning: 2 warnings emitted
2020-04-24T05:24:34.3873824Z 2020-04-24T05:24:34.3931419Z 2020-04-24T05:24:34.3931711Z running 2499 tests
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---
2020-04-24T05:29:26.0115290Z 2020-04-24T05:29:26.0115679Z running 1020 tests
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2020-04-24T05:30:49.2429944Z test result: ok. 1000 passed; 0 failed; 20 ignored; 0 measured; 0 filtered out
2020-04-24T05:30:49.2430184Z 2020-04-24T05:30:49.2531149Z finished in 154.418
2020-04-24T05:30:49.2537925Z Set({"src/libterm"}) not skipped for "bootstrap::test::Crate" -- not in ["src/tools/tidy"]
---
2020-04-24T05:33:46.1823688Z 2020-04-24T05:33:46.1824731Z test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
2020-04-24T05:33:46.1825054Z 2020-04-24T05:33:46.1883029Z finished in 0.968
2020-04-24T05:33:46.1894141Z Set({"/checkout/src/librustc_query_system"}) not skipped for "bootstrap::test::CrateLibrustc" -- not in ["src/tools/tidy"]
2020-04-24T05:33:46.1912743Z Testing rustc_query_system stage1 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
2020-04-24T05:33:46.3874663Z Compiling rustc_query_system v0.0.0 (/checkout/src/librustc_query_system)
2020-04-24T05:33:47.4031056Z Running build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/rustc_query_system-c5771041bac2aee4
2020-04-24T05:33:47.4060485Z 2020-04-24T05:33:47.4061145Z running 0 tests
2020-04-24T05:33:47.4061580Z ---
2020-04-24T05:47:11.5386807Z Set({"/checkout/src/librustc_parse"}) not skipped for "bootstrap::doc::Rustc" -- not in ["src/tools/tidy"]
2020-04-24T05:47:11.5387527Z Set({"/checkout/src/librustc_passes"}) not skipped for "bootstrap::doc::Rustc" -- not in ["src/tools/tidy"]
2020-04-24T05:47:11.5388426Z Set({"/checkout/src/librustc_plugin_impl"}) not skipped for "bootstrap::doc::Rustc" -- not in ["src/tools/tidy"]
2020-04-24T05:47:11.5389149Z Set({"/checkout/src/librustc_privacy"}) not skipped for "bootstrap::doc::Rustc" -- not in ["src/tools/tidy"]
2020-04-24T05:47:11.5389901Z Set({"/checkout/src/librustc_query_system"}) not skipped for "bootstrap::doc::Rustc" -- not in ["src/tools/tidy"]
2020-04-24T05:47:11.5391358Z Set({"/checkout/src/librustc_save_analysis"}) not skipped for "bootstrap::doc::Rustc" -- not in ["src/tools/tidy"]
2020-04-24T05:47:11.5392185Z Set({"/checkout/src/librustc_session"}) not skipped for "bootstrap::doc::Rustc" -- not in ["src/tools/tidy"]
2020-04-24T05:47:11.5392909Z Set({"/checkout/src/librustc_span"}) not skipped for "bootstrap::doc::Rustc" -- not in ["src/tools/tidy"]
2020-04-24T05:47:11.5393665Z Set({"/checkout/src/librustc_symbol_mangling"}) not skipped for "bootstrap::doc::Rustc" -- not in ["src/tools/tidy"]
---
2020-04-24T05:48:13.6282203Z Suite("src/test/run-make-fulldeps") not skipped for "bootstrap::test::RunMakeFullDeps" -- not in ["src/tools/tidy"]
2020-04-24T05:48:13.6664412Z Check compiletest suite=run-make-fulldeps mode=run-make (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
2020-04-24T05:48:13.8924425Z 2020-04-24T05:48:13.8926482Z running 211 tests
2020-04-24T05:48:43.0654805Z ......................i...ii.......................................................................i 100/211
2020-04-24T05:49:16.5662207Z ........................................iiiiii......i..............iii.............................F 200/211
2020-04-24T05:49:21.8544032Z .......ii..
2020-04-24T05:49:21.8544594Z 2020-04-24T05:49:21.8553004Z ---- [run-make] run-make-fulldeps/treat-err-as-bug stdout ----
2020-04-24T05:49:21.8555054Z 2020-04-24T05:49:21.8555696Z error: make failed
2020-04-24T05:49:21.8555696Z error: make failed
2020-04-24T05:49:21.8556034Z status: exit code: 2
2020-04-24T05:49:21.8556325Z command: "make"
2020-04-24T05:49:21.8556588Z stdout:
2020-04-24T05:49:21.8557453Z ------------------------------------------
2020-04-24T05:49:21.8561833Z LD_LIBRARY_PATH="/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-make-fulldeps/treat-err-as-bug/treat-err-as-bug:/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/lib:/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-bootstrap-tools/x86_64-unknown-linux-gnu/release/deps:/checkout/obj/build/x86_64-unknown-linux-gnu/stage0/lib" '/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc' --out-dir /checkout/obj/build/x86_64-unknown-linux-gnu/test/run-make-fulldeps/treat-err-as-bug/treat-err-as-bug -L /checkout/obj/build/x86_64-unknown-linux-gnu/test/run-make-fulldeps/treat-err-as-bug/treat-err-as-bug err.rs -Z treat-err-as-bug 2>&1 \
2020-04-24T05:49:21.8563524Z | "/checkout/src/etc/cat-and-grep.sh" "panicked at 'aborting due to \`-Z treat-err-as-bug=1\`'"
2020-04-24T05:49:21.8563829Z [[[ begin stdout ]]]
2020-04-24T05:49:21.8564291Z error[E0080]: could not evaluate static initializer
2020-04-24T05:49:21.8564851Z |
2020-04-24T05:49:21.8564851Z |
2020-04-24T05:49:21.8565197Z 3 | pub static C: u32 = 0-1;
2020-04-24T05:49:21.8565641Z 2020-04-24T05:49:21.8565903Z 2020-04-24T05:49:21.8565903Z 2020-04-24T05:49:21.8566068Z [[[ end stdout ]]]
2020-04-24T05:49:21.8566565Z Error: cannot match: panicked at 'aborting due to `-Z treat-err-as-bug=1`'
2020-04-24T05:49:21.8567063Z Makefile:4: recipe for target 'all' failed
2020-04-24T05:49:21.8567589Z ------------------------------------------
2020-04-24T05:49:21.8567777Z stderr:
2020-04-24T05:49:21.8568131Z ------------------------------------------
2020-04-24T05:49:21.8568131Z ------------------------------------------
2020-04-24T05:49:21.8568360Z make: *** [all] Error 1
2020-04-24T05:49:21.8568832Z ------------------------------------------
2020-04-24T05:49:21.8568988Z 2020-04-24T05:49:21.8569095Z 2020-04-24T05:49:21.8569186Z ---
2020-04-24T05:49:21.8571061Z thread 'main' panicked at 'Some tests failed', src/tools/compiletest/src/main.rs:348:22
2020-04-24T05:49:21.8571446Z note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
2020-04-24T05:49:21.8571657Z 2020-04-24T05:49:21.8571747Z 2020-04-24T05:49:21.8587406Z 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" "--rustdoc-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustdoc" "--src-base" "/checkout/src/test/run-make-fulldeps" "--build-base" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-make-fulldeps" "--stage-id" "stage2-x86_64-unknown-linux-gnu" "--mode" "run-make" "--target" "x86_64-unknown-linux-gnu" "--host" "x86_64-unknown-linux-gnu" "--llvm-filecheck" "/usr/lib/llvm-8/bin/FileCheck" "--nodejs" "/usr/bin/node" "--host-rustcflags" "-Crpath -O -Cdebuginfo=0 -Zunstable-options -Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "--target-rustcflags" "-Crpath -O -Cdebuginfo=0 -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" "8.0.0" "--system-llvm" "--cc" "cc" "--cxx" "c++" "--cflags" "-ffunction-sections -fdata-sections -fPIC -m64" "--llvm-components" "aarch64 aarch64asmparser aarch64asmprinter aarch64codegen aarch64desc aarch64disassembler aarch64info aarch64utils aggressiveinstcombine all all-targets amdgpu amdgpuasmparser amdgpuasmprinter amdgpucodegen amdgpudesc amdgpudisassembler amdgpuinfo amdgpuutils analysis arm armasmparser armasmprinter armcodegen armdesc armdisassembler arminfo armutils asmparser asmprinter avr avrasmparser avrasmprinter avrcodegen avrdesc avrdisassembler avrinfo binaryformat bitreader bitwriter bpf bpfasmparser bpfasmprinter bpfcodegen bpfdesc bpfdisassembler bpfinfo codegen core coroutines coverage debuginfocodeview debuginfodwarf debuginfomsf debuginfopdb demangle dlltooldriver engine executionengine fuzzmutate globalisel hexagon hexagonasmparser hexagoncodegen hexagondesc hexagondisassembler hexagoninfo instcombine instrumentation interpreter ipo irreader lanai lanaiasmparser lanaiasmprinter lanaicodegen lanaidesc lanaidisassembler lanaiinfo libdriver lineeditor linker lto mc mca mcdisassembler mcjit mcparser mips mipsasmparser mipsasmprinter mipscodegen mipsdesc mipsdisassembler mipsinfo mirparser msp430 msp430asmparser msp430asmprinter msp430codegen msp430desc msp430disassembler msp430info native nativecodegen nvptx nvptxasmprinter nvptxcodegen nvptxdesc nvptxinfo objcarcopts object objectyaml option optremarks orcjit passes perfjitevents powerpc powerpcasmparser powerpcasmprinter powerpccodegen powerpcdesc powerpcdisassembler powerpcinfo profiledata runtimedyld scalaropts selectiondag sparc sparcasmparser sparcasmprinter sparccodegen sparcdesc sparcdisassembler sparcinfo support symbolize systemz systemzasmparser systemzasmprinter systemzcodegen systemzdesc systemzdisassembler systemzinfo tablegen target textapi transformutils vectorize webassembly webassemblyasmparser webassemblyasmprinter webassemblycodegen webassemblydesc webassemblydisassembler webassemblyinfo windowsmanifest x86 x86asmparser x86asmprinter x86codegen x86desc x86disassembler x86info x86utils xcore xcoreasmprinter xcorecodegen xcoredesc xcoredisassembler xcoreinfo xray" "--ar" "ar" "--llvm-bin-dir" "/usr/lib/llvm-8/bin" "--adb-path" "adb" "--adb-test-dir" "/data/tmp/work" "--android-cross-path" "" "--color" "always"
2020-04-24T05:49:21.8593911Z 2020-04-24T05:49:21.8594117Z 2020-04-24T05:49:21.8599377Z failed to run: /checkout/obj/build/bootstrap/debug/bootstrap test --exclude src/tools/tidy
2020-04-24T05:49:21.8600055Z Build completed unsuccessfully in 1:37:41
2020-04-24T05:49:21.8600055Z Build completed unsuccessfully in 1:37:41
2020-04-24T05:49:21.8647411Z == clock drift check ==
2020-04-24T05:49:21.8676668Z local time: Fri Apr 24 05:49:21 UTC 2020
2020-04-24T05:49:21.9669530Z network time: Fri, 24 Apr 2020 05:49:21 GMT
2020-04-24T05:49:23.6589792Z 2020-04-24T05:49:23.6589792Z 2020-04-24T05:49:23.6657960Z ##[error]Bash exited with code '1'.
2020-04-24T05:49:23.6673155Z ##[section]Finishing: Run build
2020-04-24T05:49:23.6721578Z ##[section]Starting: Checkout rust-lang/rust@refs/pull/71489/merge to s
2020-04-24T05:49:23.6726313Z Task : Get sources
2020-04-24T05:49:23.6726630Z Description : Get sources from a repository. Supports Git, TfsVC, and SVN repositories.
2020-04-24T05:49:23.6726934Z Version : 1.0.0
2020-04-24T05:49:23.6727140Z Author : Microsoft
2020-04-24T05:49:23.6727140Z Author : Microsoft
2020-04-24T05:49:23.6727613Z Help : [More Information](https://go.microsoft.com/fwlink/?LinkId=798199)
2020-04-24T05:49:23.6727996Z ==============================================================================
2020-04-24T05:49:24.0107312Z Cleaning any cached credential from repository: rust-lang/rust (GitHub)
2020-04-24T05:49:24.0165412Z ##[section]Finishing: Checkout rust-lang/rust@refs/pull/71489/merge to s
2020-04-24T05:49:24.0259096Z Cleaning up task key
2020-04-24T05:49:24.0260393Z Start cleaning up orphan processes.
2020-04-24T05:49:24.0446528Z Terminate orphan process: pid (3325) (python)
2020-04-24T05:49:24.0637714Z ##[section]Finishing: Finalize Job

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 @rust-lang/infra. (Feature Requests)

spastorino · 2020-04-24T20:41:25Z

All this is undertested and my guess is that there are more errors like this one. I've created #71531 to move the only treat-err-as-bug test we have to ui tests but also to discuss the best approach to test this and maybe after merging that one we could start adding more treat-err-as-bug tests.

delay_span_bug bumps error_count after checking treat_err_as_bug

spastorino · 2020-04-27T16:05:43Z

@eddyb fixed the test

eddyb · 2020-04-27T20:55:12Z

@bors r+

bors · 2020-04-27T20:55:13Z

📌 Commit 3fe2804 has been approved by eddyb

@ghost

Rollup of 5 pull requests Successful merges: - rust-lang#71311 (On `FnDef` type annotation suggestion, use fn-pointer output) - rust-lang#71488 (normalize field projection ty to fix broken MIR issue) - rust-lang#71489 (Fix off by one in treat err as bug) - rust-lang#71585 (remove obsolete comment) - rust-lang#71634 (Revert rust-lang#71372 ("Fix #! (shebang) stripping account space issue").) Failed merges: r? @ghost

rust-highfive assigned eddyb Apr 23, 2020

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

spastorino force-pushed the fix-treat-err-as-bug-handling branch from c9f20d6 to 022068eCompare April 23, 2020 21:58

spastorino changed the title ~~[WIP] Fix treat err as bug handling~~Fix treat err as bug handlingApr 23, 2020

spastorino changed the title ~~Fix treat err as bug handling~~[WIP] Fix treat err as bug handlingApr 23, 2020

spastorino force-pushed the fix-treat-err-as-bug-handling branch 2 times, most recently from ebe48ec to 229970dCompare April 24, 2020 04:05

spastorino changed the title ~~[WIP] Fix treat err as bug handling~~Fix treat err as bug handlingApr 24, 2020

spastorino marked this pull request as ready for review April 24, 2020 04:21

spastorino changed the title ~~Fix treat err as bug handling~~Fix off by one in treat err as bugApr 24, 2020

spastorino force-pushed the fix-treat-err-as-bug-handling branch 3 times, most recently from b52f584 to 08fef9dCompare April 24, 2020 19:08

Fix off by one error for delay_span_bug
230e406
delay_span_bug bumps error_count after checking treat_err_as_bug

spastorino force-pushed the fix-treat-err-as-bug-handling branch from 08fef9d to 0cba5a6Compare April 27, 2020 12:14

Add test for delay_span_bug and -Ztrear-err-as-bug
3fe2804

spastorino force-pushed the fix-treat-err-as-bug-handling branch from 0cba5a6 to 3fe2804Compare April 27, 2020 16:05

bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Apr 27, 2020

Dylan-DPC-zz mentioned this pull request Apr 28, 2020
Rollup of 5 pull requests #71636
Merged

bors merged commit 2b5325d into rust-lang:masterApr 28, 2020

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Fix off by one in treat err as bug - #71489

Fix off by one in treat err as bug#71489
bors merged 2 commits into
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spastorino:fix-treat-err-as-bug-handling

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