Don't unwrap work item results as the panic trace is useless #45019
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Fixes rust-lang#43402 now there's no multithreaded panic printouts Also update a comment
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@bors: r+ Nice! |
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📌 Commit 4a6ede7 has been approved by |
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@bors p=1 Fixes spurious failure (hopefully) |
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Nice find! |
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Oct 5, 2017
…hton Don't unwrap work item results as the panic trace is useless Fixes #43402 now there's no multithreaded panic printouts Also update a comment -------- Likely regressed in #43506, where the code was changed to panic in worker threads on error. Unwrapping gives zero extra information since the stack trace is so short, so we may as well just surface that there was an error and exit the thread properly. Because there are then no multithreaded printouts, I think it should mean the output of the test for #26199 is deterministic and not interleaved (thanks to @philipc #43402 (comment) for a hint). Sadly the output is now: ``` thread '<unnamed>' panicked at 'aborting due to worker thread panic', src/librustc_trans/back/write.rs:1643:20 note: Run with `RUST_BACKTRACE=1` for a backtrace. error: could not write output to : No such file or directory error: aborting due to previous error ``` but it's an improvement over the multi-panic situation before. r? @alexcrichton
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☀️ Test successful - status-appveyor, status-travis |
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Oct 9, 2017
…chton Don't panic in the coordinator thread, bubble up the failure Fixes #43402 (take 2) Followup to #45019, this makes the coordinator thread not panic on worker failures since they can be reported reasonably back in the main thread. The output also now has no evidence of backtraces at all, unlike the previous PR: ``` $ ./build/x86_64-unknown-linux-gnu/stage1/bin/rustc -o "" x.rs error: could not write output to : No such file or directory error: aborting due to previous error ``` r? @alexcrichton
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Fixes #43402 now there's no multithreaded panic printouts
Also update a comment
Likely regressed in #43506, where the code was changed to panic in worker threads on error.
Unwrapping gives zero extra information since the stack trace is so short, so we may as well just surface that there was an error and exit the thread properly. Because there are then no multithreaded printouts, I think it should mean the output of the test for #26199 is deterministic and not interleaved (thanks to @philipc #43402 (comment) for a hint).
Sadly the output is now:
but it's an improvement over the multi-panic situation before.
r? @alexcrichton