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GeezerVison is showing github.com — gh-144727: Add test for circular lazy import crash (#144727) by pablogsal · Pull Request #144838 · python/cpython

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@pablogsal

@pablogsal pablogsal commented Feb 15, 2026 •
edited by bedevere-app Bot
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Add a regression test ensuring that circular lazy imports raise a proper
error (ImportCycleError) instead of crashing with a segfault. The crash
was fixed in gh-144733 but no test was added at the time.

  • Issue: Circular lazy import results in a crash #144727

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All reactions
@pablogsal pablogsal added the skip news label Feb 15, 2026
@pablogsal
pablogsal requested review from brettcannon, ericsnowcurrently, ncoghlan and warsaw as code owners February 15, 2026 16:02
@bedevere-app bedevere-app Bot added awaiting core review tests Tests in the Lib/test dir labels Feb 15, 2026
@bedevere-app bedevere-app Bot mentioned this pull request Feb 15, 2026
Circular lazy import results in a crash #144727
Closed
@pablogsal
pythongh-144727: Add test for circular lazy import crash (python#144727)
e8ea062 
Add a regression test ensuring that circular lazy imports raise a proper
error (ImportCycleError) instead of crashing with a segfault. The crash
was fixed in pythongh-144733 but no test was added at the time.
@pablogsal
pablogsal force-pushed the gh-144727-circular-lazy-import-test branch from 663c89f to e8ea062 Compare February 15, 2026 16:13
@pablogsal
pablogsal requested a review from DinoV as a code owner February 15, 2026 16:13
@pablogsal
pablogsal merged commit 5fe139c into python:main Feb 15, 2026
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@pablogsal
pablogsal deleted the gh-144727-circular-lazy-import-test branch February 15, 2026 18:36
@bedevere-app bedevere-app Bot removed the awaiting core review label Feb 15, 2026
brijkapadia pushed a commit to brijkapadia/cpython that referenced this pull request Feb 28, 2026
@pablogsal @brijkapadia
pythongh-144727: Add test for circular lazy import crash (python#144727…
baa8a32 
…) (python#144838)

Add a regression test ensuring that circular lazy imports raise a proper
error (ImportCycleError) instead of crashing with a segfault. The crash
was fixed in pythongh-144733 but no test was added at the time.
@Yhg1s Yhg1s added the topic-lazy-imports label Mar 17, 2026
ljfp pushed a commit to ljfp/cpython that referenced this pull request Apr 25, 2026
@pablogsal @ljfp
pythongh-144727: Add test for circular lazy import crash (python#144727…
c75f9bd 
…) (python#144838)

Add a regression test ensuring that circular lazy imports raise a proper
error (ImportCycleError) instead of crashing with a segfault. The crash
was fixed in pythongh-144733 but no test was added at the time.
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@brettcannon brettcannon Awaiting requested review from brettcannon brettcannon is a code owner
@ericsnowcurrently ericsnowcurrently Awaiting requested review from ericsnowcurrently ericsnowcurrently is a code owner
@ncoghlan ncoghlan Awaiting requested review from ncoghlan ncoghlan is a code owner
@warsaw warsaw Awaiting requested review from warsaw warsaw is a code owner
@DinoV DinoV Awaiting requested review from DinoV

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skip news tests Tests in the Lib/test dir topic-lazy-imports

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2 participants

@pablogsal @Yhg1s
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