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gh-161863: Fix possible NULL deref in _PyErr_Display - #161979

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gh-161863: Fix possible NULL deref in _PyErr_Display#161979
sobolevn wants to merge 1 commit into
python:mainfrom
sobolevn:issue-161863

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@sobolevn sobolevn commented Nov 14, 2026 •
edited by bedevere-app Bot
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Continues the work of #161860

Before:

» ./Programs/_freeze_module crash crash.py crash.h
Exception ignored in the internal traceback machinery:
SystemError: null argument to internal routine
SystemError: Codecs are not initialized

After:

» ./Programs/_freeze_module crash crash.py crash.h
SystemError: Codecs are not initialized

The credit for this change goes to @vstinner, thanks a lot for helping with the debug! It was very helpful :)

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sobolevn requested a review from vstinner November 14, 2026 05:35
@sobolevn sobolevn added skip news needs backport to 3.14 bugs and security fixes needs backport to 3.15 bugs and security fixes labels Nov 14, 2026
@bedevere-app bedevere-app Bot mentioned this pull request Nov 14, 2026
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@vstinner vstinner Awaiting requested review from vstinner
@ericsnowcurrently ericsnowcurrently Awaiting requested review from ericsnowcurrently ericsnowcurrently is a code owner

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