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Don't emit a warning for empty rmeta files. #90072

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merged 1 commit into from Oct 21, 2021
Merged

Don't emit a warning for empty rmeta files. #90072

merged 1 commit into from Oct 21, 2021

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ehuss
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@ehuss ehuss commented Oct 20, 2021

This avoids displaying a warning when attempting to load an empty rmeta file. Warnings were enabled via #89634 which can cause a lot of noise (for example, running ./x.py check). rustc generates empty rmeta files for things like binaries, which can happen when checking libraries as unittests.

Closes #89795

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r? @cjgillot

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@rust-highfive rust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Oct 20, 2021
@ehuss ehuss added the beta-nominated Nominated for backporting to the compiler in the beta channel. label Oct 20, 2021
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ehuss commented Oct 20, 2021

Nominating for beta just to avoid the warning spam when running x.py (after #90042).

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@bors r+ p=1

I think this makes sense. FWIW, it may be worth putting in the effort to avoid the user-visible tracing warnings, because they don't provide guidance on what to do -- we should strive to not give such warnings to users, IMO. Unconditional warnings with a help: text would already be an improvement.

cc @petrochenkov

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bors commented Oct 21, 2021

📌 Commit 6f91505 has been approved by Mark-Simulacrum

@bors 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 Oct 21, 2021
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bors commented Oct 21, 2021

⌛ Testing commit 6f91505 with merge 40ebd07...

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bors commented Oct 21, 2021

☀️ Test successful - checks-actions
Approved by: Mark-Simulacrum
Pushing 40ebd07 to master...

@bors bors added the merged-by-bors This PR was explicitly merged by bors. label Oct 21, 2021
@bors bors merged commit 40ebd07 into rust-lang:master Oct 21, 2021
@rustbot rustbot added this to the 1.58.0 milestone Oct 21, 2021
@apiraino apiraino added the T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. label Oct 21, 2021
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Finished benchmarking commit (40ebd07): comparison url.

Summary: This benchmark run did not return any relevant changes.

If you disagree with this performance assessment, please file an issue in rust-lang/rustc-perf.

@rustbot label: -perf-regression

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Beta backport accepted as per compiler team on Zulip

@rustbot label +beta-accepted

@rustbot rustbot added the beta-accepted Accepted for backporting to the compiler in the beta channel. label Oct 21, 2021
@Mark-Simulacrum Mark-Simulacrum removed the beta-nominated Nominated for backporting to the compiler in the beta channel. label Oct 22, 2021
@Mark-Simulacrum Mark-Simulacrum modified the milestones: 1.58.0, 1.57.0 Oct 22, 2021
@Mark-Simulacrum Mark-Simulacrum mentioned this pull request Oct 22, 2021
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bors added a commit to rust-lang-ci/rust that referenced this pull request Oct 22, 2021
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Auto merge of rust-lang#90151 - Mark-Simulacrum:beta-next, r=Mark-Sim…
7e4c9ee 
…ulacrum

[beta] backports

*  Don't emit a warning for empty rmeta files. rust-lang#90072
*  Erase late-bound regions before computing vtable debuginfo name. rust-lang#90050
*  Fix wrong niche calculation when 2+ niches are placed at the start rust-lang#90040
*  Revert rust-lang#86011 to fix an incorrect bound check rust-lang#90025
*  Fix macro_rules! duplication when reexported in the same module rust-lang#89867
* Bump cargo to include rust-lang/cargo#9979 - Fix fetching git repos after a force push.

r? `@Mark-Simulacrum`
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beta-accepted Accepted for backporting to the compiler in the beta channel. merged-by-bors This PR was explicitly merged by bors. S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
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failed to mmap rmeta metadata
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