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bpo-46329: Fix refleak in specialized isinstance error path #31005

Merged
merged 1 commit into from
Jan 29, 2022
Merged

bpo-46329: Fix refleak in specialized isinstance error path #31005

merged 1 commit into from
Jan 29, 2022

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Fidget-Spinner
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@Fidget-Spinner Fidget-Spinner commented Jan 29, 2022 •
edited by bedevere-bot
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Since cls is POP-ed, error doesn't decref it since it decrefs from TOS down.

https://bugs.python.org/issue46329

@Fidget-Spinner
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@pablogsal This fixes a refleak in GH-30855. Hopefully that means the refleak buildbots will now be green.

Before:

python -m test test_types -R 3:3 -m '*UnionTests.test_or_type_operator_with_genericalias'
0:00:00 Run tests sequentially
0:00:00 [1/1] test_types
beginning 6 repetitions
123456
......
test_types leaked [47, 47, 47] references, sum=141
test_types leaked [22, 22, 22] memory blocks, sum=66
test_types failed (reference leak)

After:

0:00:00 [1/1] test_types
beginning 6 repetitions
123456
......
== Tests result: SUCCESS ==

@markshannon
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LGTM.
@pablogsal @ambv could you merge this, please?

@pablogsal pablogsal merged commit 8fb3649 into python:main Jan 29, 2022
@Fidget-Spinner Fidget-Spinner deleted the fix_isinstance_refleak branch January 29, 2022 14:38
pablogsal added a commit that referenced this pull request Jan 29, 2022
@pablogsal
Revert "fFx refleak in isinstance error path (GH-31005)"
d8e8cbc 
This reverts commit 8fb3649.
@brandtbucher brandtbucher mentioned this pull request Jan 29, 2022
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ambv pushed a commit that referenced this pull request Jan 31, 2022
@pablogsal @ambv
Revert "fFx refleak in isinstance error path (GH-31005)"
ada2b00 
This reverts commit 8fb3649.
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@brandtbucher brandtbucher brandtbucher approved these changes

@markshannon markshannon Awaiting requested review from markshannon markshannon is a code owner

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@Fidget-Spinner @markshannon @brandtbucher @pablogsal @the-knights-who-say-ni @bedevere-bot