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@Mark-Simulacrum Mark-Simulacrum commented Feb 11, 2022

This backports:

r? @Mark-Simulacrum

@rustbot rustbot added the T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. label Feb 11, 2022
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⚠️ Warning ⚠️

  • Pull requests are usually filed against the master branch for this repo, but this one is against beta. Please double check that you specified the right target!
  • These commits modify submodules.

@rust-highfive rust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Feb 11, 2022
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@bors r+ rollup=never

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bors commented Feb 11, 2022

📌 Commit 22f1800 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 Feb 11, 2022
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@bors p=1 since we want to do a crater run on the beta resulting from this, and release deadline is pretty close.

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bors commented Feb 12, 2022

⌛ Testing commit 22f1800 with merge 7f1c8c6319579c6d8b13b046c5df947cb3520838...

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bors commented Feb 12, 2022

💔 Test failed - checks-actions

@bors bors added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. labels Feb 12, 2022
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* the logic only checked for / but not for \
* verbatim paths shouldn't skip items at all since they don't get normalized
* the extra branches get optimized out on unix since is_sep_byte is a trivial comparison and is_verbatim is always-false
* tests lacked windows coverage for these cases

That lead to equal paths not having equal hashes and to unnecessary collisions.
A fix applied to std::Path::hash triggers a miscompilation/assert in LLVM in this test on wasm32.
The miscompilation appears to pre-existing. Reverting some previous changes done std::Path also trigger it
and slight modifications such as changing the test path from "a" to "ccccccccccc" also make it pass, indicating
it's very flaky.
Since the fix is for a higher-tier platform than wasm it takes precedence.
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@bors r+ rollup=never

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bors commented Feb 12, 2022

📌 Commit 0ac18e7 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 Feb 12, 2022
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bors commented Feb 12, 2022

⌛ Testing commit 0ac18e7 with merge 1945ce6...

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bors commented Feb 12, 2022

☀️ Test successful - checks-actions
Approved by: Mark-Simulacrum
Pushing 1945ce6 to beta...

@bors bors added the merged-by-bors This PR was explicitly merged by bors. label Feb 12, 2022
@bors bors merged commit 1945ce6 into rust-lang:beta Feb 12, 2022
@rustbot rustbot added this to the 1.59.0 milestone Feb 12, 2022
@Mark-Simulacrum Mark-Simulacrum deleted the beta-next branch February 12, 2022 22:13
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