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bpo-45160: Fix refleak in test_ttk_guionly introduced in GH-28291#29416

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ambv merged 1 commit intopython:mainfrom
ambv:fix-refleak-ttk
Nov 5, 2021
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bpo-45160: Fix refleak in test_ttk_guionly introduced in GH-28291#29416
ambv merged 1 commit intopython:mainfrom
ambv:fix-refleak-ttk

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@ambv ambv commented Nov 4, 2021 •
edited by bedevere-bot
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The closure in cb_test was the root cause of the refleak, to address it we're taking the callback handle and deleting it when we don't need it anymore. Additionally, other tests explicitly destroy OptionMenu objects to avoid issues with reference cycles.

Before the change

0:00:00 load avg: 4.23 Run tests sequentially
0:00:00 load avg: 4.23 [1/1] test_ttk_guionly
beginning 9 repetitions
123456789
.........
test_ttk_guionly leaked [63, 63, 63, 63] references, sum=252
test_ttk_guionly leaked [31, 31, 31, 31] memory blocks, sum=124
test_ttk_guionly failed (reference leak)

== Tests result: FAILURE ==

After the change

0:00:00 load avg: 10.33 Run tests sequentially
0:00:00 load avg: 10.33 [1/1] test_ttk_guionly
beginning 9 repetitions
123456789
.........

== Tests result: SUCCESS ==

https://bugs.python.org/issue45160

@bedevere-bot bedevere-bot added tests Tests in the Lib/test dir awaiting core review labels Nov 4, 2021
@ambv ambv added the skip news label Nov 4, 2021
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ambv commented Nov 5, 2021

Fix confirmed on the Windows 8.1 refleak buildbot:

0:36:09 load avg: 5.80 [146/425] test_imghdr passed -- running: test_io (5 min 9 sec), test_pickle (4 min 17 sec), test_nntplib (1 min)
beginning 6 repetitions
123456
......
0:36:28 load avg: 5.15 [147/425] test_ttk_guionly passed -- running: test_io (5 min 28 sec), test_pickle (4 min 36 sec), test_nntplib (1 min 19 sec)
beginning 6 repetitions
123456
......

Build link: https://buildbot.python.org/all/#/builders/443/builds/9

@ned-deily ned-deily assigned ambv and unassigned ned-deily Nov 5, 2021
@ambv ambv merged commit 54d1e3f into python:main Nov 5, 2021
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miss-islington commented Nov 5, 2021

Thanks @ambv for the PR 🌮🎉.. I'm working now to backport this PR to: 3.9, 3.10.
🐍🍒⛏🤖

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miss-islington commented Nov 5, 2021

Sorry @ambv, I had trouble checking out the 3.10 backport branch.
Please backport using cherry_picker on command line.
cherry_picker 54d1e3f72ed1ad8e860888c30ee7a285b931c0d1 3.10

@ambv ambv deleted the fix-refleak-ttk branch November 5, 2021 08:51
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bedevere-bot commented Nov 5, 2021

GH-29420 is a backport of this pull request to the 3.9 branch.

miss-islington pushed a commit to miss-islington/cpython that referenced this pull request Nov 5, 2021
@ambv @miss-islington
bpo-45160: Fix refleak in test_ttk_guionly introduced in pythonGH-28291…
291155b 
… (pythonGH-29416)

(cherry picked from commit 54d1e3f)

Co-authored-by: Łukasz Langa <lukasz@langa.pl>
@ambv ambv added needs backport to 3.10 only security fixes and removed needs backport to 3.10 only security fixes labels Nov 5, 2021
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miss-islington commented Nov 5, 2021

Thanks @ambv for the PR 🌮🎉.. I'm working now to backport this PR to: 3.10.
🐍🍒⛏🤖

@ambv ambv added needs backport to 3.10 only security fixes and removed needs backport to 3.10 only security fixes labels Nov 5, 2021
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miss-islington commented Nov 5, 2021

Thanks @ambv for the PR 🌮🎉.. I'm working now to backport this PR to: 3.10.
🐍🍒⛏🤖

miss-islington pushed a commit to miss-islington/cpython that referenced this pull request Nov 5, 2021
@ambv @miss-islington
bpo-45160: Fix refleak in test_ttk_guionly introduced in pythonGH-28291…
19bd16f 
… (pythonGH-29416)

(cherry picked from commit 54d1e3f)

Co-authored-by: Łukasz Langa <lukasz@langa.pl>
ambv added a commit that referenced this pull request Nov 5, 2021
@miss-islington @ambv
bpo-45160: Fix refleak in test_ttk_guionly introduced in GH-28291 (GH…
276a3a6 
…-29416) (GH-29420)

(cherry picked from commit 54d1e3f)

Co-authored-by: Łukasz Langa <lukasz@langa.pl>
ambv added a commit that referenced this pull request Nov 5, 2021
@miss-islington @ambv
bpo-45160: Fix refleak in test_ttk_guionly introduced in GH-28291 (GH…
099a94f 
…-29416) (GH-29421)

(cherry picked from commit 54d1e3f)

Co-authored-by: Łukasz Langa <lukasz@langa.pl>
@terryjreedy terryjreedy removed the needs backport to 3.10 only security fixes label Feb 18, 2025
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