ci: spurious failure tests\mir-opt\strip_debuginfo.rs Cannot create a file when that file already exists.`

[matthiaskrgr]

Updating files:  98% (49835/50852)
Updating files:  99% (50344/50852)
Updating files: 100% (50852/50852)
Updating files: 100% (50852/50852), done.
branch 'try' set up to track 'origin/try'.
Switched to a new branch 'try'
[command]"C:\Program Files\Git\bin\git.exe" log -1 --format=%H
f65c65d2950b6323289194d2292d6ee0d3cf620e
##[group]Run src/ci/scripts/setup-environment.sh
src/ci/scripts/setup-environment.sh
---
file:.git/config remote.origin.url=https://github.com/rust-lang-ci/rust
file:.git/config remote.origin.fetch=+refs/heads/*:refs/remotes/origin/*
file:.git/config gc.auto=0
file:.git/config http.https://github.com/.extraheader=AUTHORIZATION: basic ***
file:.git/config branch.try.remote=origin
file:.git/config branch.try.merge=refs/heads/try
file:.git/config remote.upstream.fetch=+refs/heads/*:refs/remotes/upstream/*
file:.git/config submodule.library/backtrace.active=true
file:.git/config submodule.library/backtrace.url=https://github.com/rust-lang/backtrace-rs.git
file:.git/config submodule.library/stdarch.active=true
---
test [mir-opt] tests\mir-opt\inline\polymorphic_recursion.rs ... ok

failures:

---- [mir-opt] tests\mir-opt\strip_debuginfo.rs#TINY stdout ----
thread '[mir-opt] tests\mir-opt\strip_debuginfo.rs#TINY' panicked at src\tools\compiletest\src\runtest.rs:213:30:
called `Result::unwrap()` on an `Err` value: Os { code: 183, kind: AlreadyExists, message: "Cannot create a file when that file already exists." }


failures:
    [mir-opt] tests\mir-opt\strip_debuginfo.rs#TINY
    [mir-opt] tests\mir-opt\strip_debuginfo.rs#TINY

test result: FAILED. 307 passed; 1 failed; 3 ignored; 0 measured; 0 filtered out; finished in 8.20s

Some tests failed in compiletest suite=mir-opt mode=mir-opt host=x86_64-pc-windows-msvc target=x86_64-pc-windows-msvc
Build completed unsuccessfully in 0:46:43
make: *** [Makefile:106: ci-msvc-ps1] Error 1
  network time: Sun, 15 Dec 2024 17:24:30 GMT
##[error]Process completed with exit code 2.
Post job cleanup.
[command]"C:\Program Files\Git\bin\git.exe" version

happend here: #134342 (comment) on x86_64-msvc

the pr changed neither code nor related tests so seems spurious

[jieyouxu]

Also happened in #135336. I'm fairly sure this is a genuine bug, but I haven't looked into it just yet.

[jieyouxu]

After we no longer silently ignore the remove half in #139870, the failure rate of this test has significantly increased and also fails against x86_64-apple-1 -- so there does seem to be sth genuinely wrong with the dir handling.

[matthiaskrgr]

https://github.com/rust-lang/rust/pulls?q=is%3Apr+%22failed+to+remove+and+recreate+output+directory%22++

[jieyouxu]

Triage: I believe this was addressed by #140120.