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GeezerVison is showing github.com — [3.14] gh-153668: Temporarily disable unicodectype.c optimization on WinARM64 due to compiler bug (GH-153669) by chris-eibl · Pull Request #158221 · python/cpython

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@chris-eibl

@chris-eibl chris-eibl commented Sep 26, 2026 •
edited by bedevere-app Bot
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  • Only disable during Release (not PGO)

  • Update PCbuild/pyproject.props

(cherry picked from commit 9ea05d4)

Co-authored-by: Steve Dower [email protected]
Co-authored-by: Chris Eibl [email protected]

  • Issue: Windows Arm64 release build fails #153668

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@zooba @chris-eibl
pythongh-153668: Temporarily disable unicodectype.c optimization on W…
acac7d4 
…inARM64 due to compiler bug (python#153669)

* Only disable during Release (not PGO)

* Update PCbuild/pyproject.props

---------

Co-authored-by: Chris Eibl <[email protected]>
(cherry picked from commit 9ea05d4)

# Conflicts:
#	PCbuild/pythoncore.vcxproj
@chris-eibl
chris-eibl requested a review from a team as a code owner September 26, 2026 06:31
@bedevere-app bedevere-app Bot mentioned this pull request Sep 26, 2026
Windows Arm64 release build fails #153668
Open
@bedevere-app bedevere-app Bot added the awaiting core review label Sep 26, 2026
@bedevere-app bedevere-app Bot mentioned this pull request Sep 26, 2026
gh-153668: Temporarily disable unicodectype.c optimization on WinARM64 due to compiler bug #153669
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@bedevere-app bedevere-app Bot added the skip news label Sep 26, 2026
@chris-eibl

chris-eibl commented Sep 26, 2026

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!buildbot ARM64 Windows Non-Debug
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@bedevere-bot

bedevere-bot commented Sep 26, 2026

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🤖 New build scheduled with the buildbot fleet by @chris-eibl for commit acac7d4 🤖

Results will be shown at:

https://buildbot.python.org/all/#/grid?branch=refs%2Fpull%2F158221%2Fmerge

The command will test the builders whose names match following regular expression: ARM64 Windows Non-Debug

The builders matched are:

  • ARM64 Windows Non-Debug PR
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@chris-eibl

chris-eibl commented Sep 26, 2026

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ARM64 Windows Non-Debug PR is green now. I am pretty sure this will also fix the Windows MSI / installer for arm64 which does a debug and release build, where the latter fails.

But this workflow did not trigger, because no related file was touched, and I don't see a way to force it manually force it via the web interface.

I could do a dummy edit in pythonba.vcxproj to force CI (and revert again later) if deemed reasonable.
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@hugovk

hugovk commented Sep 26, 2026

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I could do a dummy edit in pythonba.vcxproj to force CI (and revert again later) if deemed reasonable.

Yeah, let's do this, would be good to know it fixes both.
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@chris-eibl
dummy edit to trigger MSI CI
b08e559
@chris-eibl chris-eibl added the DO-NOT-MERGE label Sep 26, 2026
@chris-eibl

chris-eibl commented Sep 26, 2026

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Yeah, let's do this,

Done and applied DO-NOT-MERGE until reverted
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chris-eibl added 2 commits September 26, 2026 09:28
@chris-eibl
dummy edit, 2nd attempt
e2087c4
@chris-eibl
remove dummy edit
4a12085
@chris-eibl

chris-eibl commented Sep 26, 2026

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https://github.com/python/cpython/actions/runs/36226897399/job/108362666090 is green so removing dummy edit and DO-NOT-MERGE 🚀
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@chris-eibl chris-eibl removed the DO-NOT-MERGE label Sep 26, 2026
@hugovk
hugovk merged commit 390f3d3 into python:3.14 Sep 26, 2026
48 of 49 checks passed

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@bedevere-app bedevere-app Bot removed the awaiting core review label Sep 26, 2026
@hugovk

hugovk commented Sep 26, 2026

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Thanks!
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@chris-eibl chris-eibl mentioned this pull request Sep 26, 2026
3.14: Windows on Arm build fails since windows-11-arm migrated to windows-11-vs2026-arm #158244
Open
@chris-eibl
chris-eibl deleted the backport-9ea05d4-3.14 branch September 26, 2026 18:23
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4 participants

@chris-eibl @bedevere-bot @hugovk @zooba
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