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gh-133967: Do not normalize locale name 'C.UTF-8' to 'en_US.UTF-8'#135347

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Yhg1s merged 1 commit intopython:mainfrom
serhiy-storchaka:locale_alias-c-utf8
Jun 10, 2025
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gh-133967: Do not normalize locale name 'C.UTF-8' to 'en_US.UTF-8'#135347
Yhg1s merged 1 commit intopython:mainfrom
serhiy-storchaka:locale_alias-c-utf8

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@serhiy-storchaka serhiy-storchaka commented Jun 10, 2025 •
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@serhiy-storchaka serhiy-storchaka added needs backport to 3.13 bugs and security fixes needs backport to 3.14 bugs and security fixes labels Jun 10, 2025
@bedevere-app bedevere-app bot mentioned this pull request Jun 10, 2025
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@Yhg1s Yhg1s enabled auto-merge (squash) June 10, 2025 13:14
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malemburg approved these changes Jun 10, 2025
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LGTM

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malemburg commented Jun 10, 2025

Note that we have had the 'c.utf8' mapping for a long time in the past (Python 3.4 - 3.11). It was changed to map to 'C.UTF-8' in Python 3.12.

With the PR, the mapping will be removed again, but the normalization will still go from 'c.utf8' to 'C.UTF-8', just via a different code path.

For consistency and to make this a bug fix, rather than a new feature, it's probably better to keep the 'c.utf8' -> 'C.UTF-8' mapping in the table and enforce this, but I'll leave that for you to decide.

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malemburg commented Jun 10, 2025

See #14925 for some additional context.

@Yhg1s Yhg1s merged commit 0f866cb into python:main Jun 10, 2025
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miss-islington-app bot commented Jun 10, 2025

Thanks @serhiy-storchaka for the PR, and @Yhg1s for merging it 🌮🎉.. I'm working now to backport this PR to: 3.13, 3.14.
🐍🍒⛏🤖

miss-islington pushed a commit to miss-islington/cpython that referenced this pull request Jun 10, 2025
@serhiy-storchaka @miss-islington
pythongh-133967: Do not normalize locale name 'C.UTF-8' to 'en_US.UTF…
74b8a7f 
…-8' (pythonGH-135347)

(cherry picked from commit 0f866cb)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
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bedevere-app bot commented Jun 10, 2025

GH-135349 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, 2025
miss-islington pushed a commit to miss-islington/cpython that referenced this pull request Jun 10, 2025
@serhiy-storchaka @miss-islington
pythongh-133967: Do not normalize locale name 'C.UTF-8' to 'en_US.UTF…
55b7cff 
…-8' (pythonGH-135347)

(cherry picked from commit 0f866cb)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
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bedevere-app bot commented Jun 10, 2025

GH-135350 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, 2025
serhiy-storchaka added a commit that referenced this pull request Jun 11, 2025
@miss-islington @serhiy-storchaka
[3.14] gh-133967: Do not normalize locale name 'C.UTF-8' to 'en_US.UT…
30494cc 
…F-8' (GH-135347) (GH-135349)

(cherry picked from commit 0f866cb)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
serhiy-storchaka added a commit that referenced this pull request Jun 11, 2025
@miss-islington @serhiy-storchaka
[3.13] gh-133967: Do not normalize locale name 'C.UTF-8' to 'en_US.UT…
ffeaeaf 
…F-8' (GH-135347) (GH-135350)

(cherry picked from commit 0f866cb)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
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bedevere-bot commented Jun 11, 2025

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot iOS ARM64 Simulator 3.14 (tier-3) has failed when building commit 30494cc.

What do you need to do:

  1. Don't panic.
  2. Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
  3. Go to the page of the buildbot that failed (https://buildbot.python.org/#/builders/1722/builds/246) and take a look at the build logs.
  4. Check if the failure is related to this commit (30494cc) or if it is a false positive.
  5. If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

https://buildbot.python.org/#/builders/1722/builds/246

Summary of the results of the build (if available):

Click to see traceback logs 
remote: Enumerating objects: 14, done.        
remote: Counting objects:  11% (1/9)        
remote: Counting objects:  22% (2/9)        
remote: Counting objects:  33% (3/9)        
remote: Counting objects:  44% (4/9)        
remote: Counting objects:  55% (5/9)        
remote: Counting objects:  66% (6/9)        
remote: Counting objects:  77% (7/9)        
remote: Counting objects:  88% (8/9)        
remote: Counting objects: 100% (9/9)        
remote: Counting objects: 100% (9/9), done.        
remote: Compressing objects:  12% (1/8)        
remote: Compressing objects:  25% (2/8)        
remote: Compressing objects:  37% (3/8)        
remote: Compressing objects:  50% (4/8)        
remote: Compressing objects:  62% (5/8)        
remote: Compressing objects:  75% (6/8)        
remote: Compressing objects:  87% (7/8)        
remote: Compressing objects: 100% (8/8)        
remote: Compressing objects: 100% (8/8), done.        
remote: Total 14 (delta 1), reused 1 (delta 1), pack-reused 5 (from 2)        
From https://github.com/python/cpython
 * branch                    3.14       -> FETCH_HEAD
Note: switching to '30494cc72c2b5e0c1d9df5f944fadbb82595497d'.

You are in 'detached HEAD' state. You can look around, make experimental
changes and commit them, and you can discard any commits you make in this
state without impacting any branches by switching back to a branch.

If you want to create a new branch to retain commits you create, you may
do so (now or later) by using -c with the switch command. Example:

  git switch -c <new-branch-name>

Or undo this operation with:

  git switch -

Turn off this advice by setting config variable advice.detachedHead to false

HEAD is now at 30494cc72c2 [3.14] gh-133967: Do not normalize locale name 'C.UTF-8' to 'en_US.UTF-8' (GH-135347) (GH-135349)
Switched to and reset branch '3.14'

configure: WARNING: no system libmpdecimal found; falling back to bundled libmpdecimal (deprecated and scheduled for removal in Python 3.15)
configure: WARNING: pkg-config is missing. Some dependencies may not be detected correctly.

configure: WARNING: no system libmpdecimal found; falling back to bundled libmpdecimal (deprecated and scheduled for removal in Python 3.15)
configure: WARNING: pkg-config is missing. Some dependencies may not be detected correctly.

make: *** [testios] Terminated: 15

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Yhg1s commented Jun 11, 2025

@malemburg auto-merge went through before anyone could address your comment, I think. Do you think it's worth making that change in a follow-up?

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malemburg commented Jun 11, 2025

@malemburg auto-merge went through before anyone could address your comment, I think. Do you think it's worth making that change in a follow-up?

It would be good to readd the mapping to the table, since this will get added back in the next run of the Tools/i18n/makelocalealias.py tool anyway and could then cause questions popping up, since Sergey added the comment to the table saying that the mapping was removed.

lkollar pushed a commit to lkollar/cpython that referenced this pull request Jun 19, 2025
@serhiy-storchaka @lkollar
pythongh-133967: Do not normalize locale name 'C.UTF-8' to 'en_US.UTF…
403d94c 
…-8' (python#135347)
Pranjal095 pushed a commit to Pranjal095/cpython that referenced this pull request Jul 12, 2025
@serhiy-storchaka @Pranjal095
pythongh-133967: Do not normalize locale name 'C.UTF-8' to 'en_US.UTF…
07e8667 
…-8' (python#135347)
taegyunkim pushed a commit to taegyunkim/cpython that referenced this pull request Aug 4, 2025
@serhiy-storchaka @taegyunkim
pythongh-133967: Do not normalize locale name 'C.UTF-8' to 'en_US.UTF…
b08d422 
…-8' (python#135347)
Agent-Hellboy pushed a commit to Agent-Hellboy/cpython that referenced this pull request Aug 19, 2025
@serhiy-storchaka @Agent-Hellboy
pythongh-133967: Do not normalize locale name 'C.UTF-8' to 'en_US.UTF…
fc84931 
…-8' (python#135347)
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