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Rust sometimes emits calls to _Unwind_Resume on opt-level = 0 with panic = abort #53301

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CryZe opened this issue Aug 13, 2018 · 5 comments
Open

Rust sometimes emits calls to _Unwind_Resume on opt-level = 0 with panic = abort #53301

CryZe opened this issue Aug 13, 2018 · 5 comments
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A-linkage Area: linking into static, shared libraries and binaries C-bug Category: This is a bug. S-needs-repro Status: This issue has no reproduction and needs a reproduction to make progress. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.

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@CryZe
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CryZe commented Aug 13, 2018

I don't think this is intentional. I'm working on a no_std project and for the first time tried to compile with the debug profile and there seem to be undefined references to _Unwind_Resume even though panic = "abort" is specified. opt-level = 1 seems to get rid of those calls.
@JustAPerson JustAPerson mentioned this issue Jan 2, 2019
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@jonas-schievink jonas-schievink added A-linkage Area: linking into static, shared libraries and binaries C-bug Category: This is a bug. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Aug 6, 2019
@badboy badboy mentioned this issue Jun 5, 2020
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@glandium
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As of #67502, this happens at any opt-level because of libstd itself containing these symbols.

@glandium
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(and libbacktrace)

@pnkfelix pnkfelix mentioned this issue Sep 7, 2022
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@Enselic
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Enselic commented Dec 16, 2023

Triage: Please provide a minimal way to reproduce the problem (if this still is a problem). Thanks!

@Enselic Enselic added the E-needs-mcve Call for participation: This issue has a repro, but needs a Minimal Complete and Verifiable Example label Dec 16, 2023
@jackh726
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Closing since there is no reproduction.

@bjorn3
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bjorn3 commented Dec 25, 2023

I'm fairly certain this is still an issue as the standard library is still compiled with panic=unwind. The default -Clink-dead-code=no may mask this in most cases, but that is not the solution.

@jackh726 jackh726 reopened this Dec 25, 2023
@jackh726 jackh726 added S-needs-repro Status: This issue has no reproduction and needs a reproduction to make progress. and removed E-needs-mcve Call for participation: This issue has a repro, but needs a Minimal Complete and Verifiable Example labels Dec 25, 2023
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A-linkage Area: linking into static, shared libraries and binaries C-bug Category: This is a bug. S-needs-repro Status: This issue has no reproduction and needs a reproduction to make progress. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
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@Enselic @glandium @CryZe @jonas-schievink @bjorn3 @jackh726