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Windows tail-call CI does not run the test cases #131678

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Windows tail-call CI does not run the test cases#131678
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3.14bugs and security fixesOS-windowsinfraCI, GitHub Actions, buildbots, Dependabot, etc.type-bugAn unexpected behavior, bug, or error
@chris-eibl

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@chris-eibl
chris-eibl
opened on Mar 24, 2025

Excerpts from here #131526 (comment):

See e.g. https://github.com/python/cpython/actions/runs/14006628024/job/39221297660 and https://github.com/python/cpython/actions/runs/13954576580/job/39062383429#step:4:326.

After building, no more output can be seen.

This is interesting, because

cpython/.github/workflows/tail-call.yml

Lines 82 to 91 in ce79274

- name: Native Windows (debug)
if: runner.os == 'Windows' && matrix.architecture != 'ARM64'
shell: cmd
run: |
choco install llvm --allow-downgrade --no-progress --version ${{ matrix.llvm }}.1.5
set PlatformToolset=clangcl
set LLVMToolsVersion=${{ matrix.llvm }}.1.5
set LLVMInstallDir=C:\Program Files\LLVM
./PCbuild/build.bat --tail-call-interp -d -p ${{ matrix.architecture }}
./PCbuild/rt.bat -d -p ${{ matrix.architecture }} -q --multiprocess 0 --timeout 4500 --verbose2 --verbose3

clearly ./PCbuild/rt.bat is invoked. Maybe the reason is, because it is not used with backslashes like in

cpython/.github/workflows/reusable-windows.yml

Line 52 in ce79274

.\\PCbuild\\rt.bat

The question then is, why ./PCbuild/build.bat is working ...

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