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[3.15] gh-143008: Fix race re-initializing TextIOWrapper#151203

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[3.15] gh-143008: Fix race re-initializing TextIOWrapper#151203
vstinner merged 1 commit into
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@cmaloney cmaloney commented Jun 9, 2026 •
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__init__ changes multiple variables and may be called more than once from multiple threads.

Backporting only a small subset of GH-145957. See #145957 (comment)

@cmaloney
pythongh-143008: Fix race re-initilaizing TextIOWrapper
ef8b7e1 
__init__ changes multiple variables and may be called more than once
from multiple threads.
@cmaloney cmaloney requested a review from vstinner June 9, 2026 18:18
@bedevere-app bedevere-app Bot mentioned this pull request Jun 9, 2026
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@cmaloney cmaloney mentioned this pull request Jun 9, 2026
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@cmaloney cmaloney changed the title [3.15] gh-143008: Fix race re-initilaizing TextIOWrapper [3.15] gh-143008: Fix race re-initializing TextIOWrapper Jun 9, 2026
@vstinner vstinner added needs backport to 3.13 bugs and security fixes needs backport to 3.14 bugs and security fixes labels Jun 10, 2026
@vstinner vstinner merged commit 0318867 into python:3.15 Jun 10, 2026
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miss-islington-app Bot commented Jun 10, 2026

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Thanks @cmaloney for the PR, and @vstinner for merging it 🌮🎉.. I'm working now to backport this PR to: 3.13, 3.14.
🐍🍒⛏🤖

@miss-islington-app

miss-islington-app Bot commented Jun 10, 2026

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Sorry, @cmaloney and @vstinner, I could not cleanly backport this to 3.13 due to a conflict.
Please backport using cherry_picker on command line.

cherry_picker 0318867acf72e3acf78f480db73a69982573263a 3.13

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bedevere-app Bot commented Jun 10, 2026

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GH-151226 is a backport of this pull request to the 3.14 branch.

@bedevere-app bedevere-app Bot removed the needs backport to 3.14 bugs and security fixes label Jun 10, 2026
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bedevere-app Bot commented Jun 10, 2026

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GH-151227 is a backport of this pull request to the 3.13 branch.

@bedevere-app bedevere-app Bot removed the needs backport to 3.13 bugs and security fixes label Jun 10, 2026
@vstinner

vstinner commented Jun 10, 2026

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Merged, thanks for the fix. I backported it to 3.13 and 3.14 branches.

vstinner added a commit that referenced this pull request Jun 10, 2026
@vstinner @cmaloney
[3.13][3.15] gh-143008: Fix race re-initializing TextIOWrapper (#151203…
c40e6d6 
…) (#151227)

[3.15] gh-143008: Fix race re-initializing TextIOWrapper (#151203)

__init__() changes multiple variables and may be called more than once
from multiple threads.

(cherry picked from commit 0318867)

Co-authored-by: Cody Maloney <cmaloney@users.noreply.github.com>
vstinner pushed a commit that referenced this pull request Jun 10, 2026
@miss-islington @cmaloney
[3.14] gh-143008: Fix race re-initializing TextIOWrapper (GH-151203) (#…
a4bdc21 
…151226)

[3.15] gh-143008: Fix race re-initializing TextIOWrapper (GH-151203)

__init__() changes multiple variables and may be called more than once
from multiple threads.
(cherry picked from commit 0318867)

Co-authored-by: Cody Maloney <cmaloney@users.noreply.github.com>
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