[issue43710] Access violations in C extension modules on Python 3.9.3

[Terry J. Reedy]

Change by Terry J. Reedy :


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assignee: terry.reedy -> 

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[issue43710] Access violations in C extension modules on Python 3.9.3

[Terry J. Reedy]

Change by Terry J. Reedy :


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components: +Extension Modules, Windows -IDLE

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[issue43710] Access violations in C extension modules on Python 3.9.3

[PAKKURTHI MOHAN SAI KRISHNA]

Change by PAKKURTHI MOHAN SAI KRISHNA :


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assignee:  -> terry.reedy
components: +IDLE -Extension Modules, Windows
nosy: +terry.reedy

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[issue43710] Access violations in C extension modules on Python 3.9.3

[Zachary Ware]

Change by Zachary Ware :


Removed file: https://bugs.python.org/file49966/logs.gz

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[issue43710] Access violations in C extension modules on Python 3.9.3

[Zachary Ware]

Change by Zachary Ware :


Removed file: 
https://bugs.python.org/file50002/Screenshot_20210426-104915_Lucknow Public 
School.jpg

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[issue43710] Access violations in C extension modules on Python 3.9.3

[Anjali Singh]

Change by Anjali Singh :


Added file: 
https://bugs.python.org/file50002/Screenshot_20210426-104915_Lucknow Public 
School.jpg

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[issue43710] Access violations in C extension modules on Python 3.9.3

[Sunday]

Change by Sunday :


Added file: https://bugs.python.org/file49966/logs.gz

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[issue43710] Access violations in C extension modules on Python 3.9.3

[Christoph Gohlke]

Christoph Gohlke  added the comment:

Thank you for fixing this issue so fast! Python 3.9.4 works well.

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[issue43710] Access violations in C extension modules on Python 3.9.3

[Łukasz Langa]

Change by Łukasz Langa :


--
resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed

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[issue43710] Access violations in C extension modules on Python 3.9.3

[Łukasz Langa]

Łukasz Langa  added the comment:


New changeset c7b0feca25fc68ec3e0884b82e5f45a4da011e8e by Gregory P. Smith in 
branch '3.9':
[3.9] bpo-43710: Rollback the 3.9 bpo-42500 fix, it broke the ABI in 3.9.3 
(#25179)
https://github.com/python/cpython/commit/c7b0feca25fc68ec3e0884b82e5f45a4da011e8e


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[issue43710] Access violations in C extension modules on Python 3.9.3

[Gregory P. Smith]

Gregory P. Smith  added the comment:

I really suggest a simple rollback (revert) of the change rather than a 
redo-fix for 3.9.4.  Unless you like the idea of a possible 3.9.5 if the 
redo-fix itself has issues that haven't been given due thought in the rush to 
undo the 3.9.3 mistake.

This leaves more time for a proper fix of bpo-42500 in 3.9 not crafted under 
duress.

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[issue43710] Access violations in C extension modules on Python 3.9.3

[Gregory P. Smith]

Change by Gregory P. Smith :


--
nosy: +gregory.p.smith
nosy_count: 7.0 -> 8.0
pull_requests: +23920
pull_request: https://github.com/python/cpython/pull/25179

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[issue43710] Access violations in C extension modules on Python 3.9.3

[Łukasz Langa]

Łukasz Langa  added the comment:

Tomorrow evening CEST (around 30 hours from now) I intend to release a hotfix 
3.9.4 with Mark's fix.

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priority: normal -> release blocker

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[issue43710] Access violations in C extension modules on Python 3.9.3

[Mark Shannon]

Change by Mark Shannon :


--
keywords: +patch
pull_requests: +23907
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/25160

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[issue43710] Access violations in C extension modules on Python 3.9.3

[Karthikeyan Singaravelan]

Change by Karthikeyan Singaravelan :


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nosy: +Mark.Shannon, lukasz.langa

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[issue43710] Access violations in C extension modules on Python 3.9.3

[Christoph Gohlke]

New submission from Christoph Gohlke :

First reported at https://github.com/numpy/numpy/issues/18720

After upgrading to Python 3.9.3, 32-bit on Windows, importing numpy (installed 
via `pip install numpy`) crashes:

```
Microsoft Windows [Version 10.0.19041.906]
C:\Python39-32>python -X dev
Python 3.9.3 (tags/v3.9.3:e723086, Apr  2 2021, 11:01:03) [MSC v.1928 32 bit 
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import numpy
Windows fatal exception: access violation

Current thread 0x105c (most recent call first):
  File "", line 228 in _call_with_frames_removed
  File "", line 1116 in exec_module
  File "", line 680 in _load_unlocked
  File "", line 986 in _find_and_load_unlocked
  File "", line 1007 in _find_and_load
  File "", line 228 in _call_with_frames_removed
  File "", line 1116 in exec_module
  File "", line 680 in _load_unlocked
  File "", line 986 in _find_and_load_unlocked
  File "", line 1007 in _find_and_load
  File "", line 228 in _call_with_frames_removed
  File "", line 1116 in exec_module
  File "", line 680 in _load_unlocked
  File "", line 986 in _find_and_load_unlocked
  File "", line 1007 in _find_and_load
  File "C:\Python39-32\lib\site-packages\numpy\random\_pickle.py", line 1 in 

  File "", line 228 in _call_with_frames_removed
  File "", line 790 in exec_module
  File "", line 680 in _load_unlocked
  File "", line 986 in _find_and_load_unlocked
  File "", line 1007 in _find_and_load
  File "", line 228 in _call_with_frames_removed
  File "", line 1058 in _handle_fromlist
  File "C:\Python39-32\lib\site-packages\numpy\random\__init__.py", line 179 in 

  File "", line 228 in _call_with_frames_removed
  File "", line 790 in exec_module
  File "", line 680 in _load_unlocked
  File "", line 986 in _find_and_load_unlocked
  File "", line 1007 in _find_and_load
  File "", line 228 in _call_with_frames_removed
  File "", line 1058 in _handle_fromlist
  File "C:\Python39-32\lib\site-packages\numpy\__init__.py", line 156 in 

  File "", line 228 in _call_with_frames_removed
  File "", line 790 in exec_module
  File "", line 680 in _load_unlocked
  File "", line 986 in _find_and_load_unlocked
  File "", line 1007 in _find_and_load
  File "", line 1 in 
```

Rebuilding numpy from source against Python 3.9.3 fixes this crash, but many 
other packages compiled against older versions of Python 3.9.x still crash.

I think this might be due to 
.

In `bpo-42500: Fix recursion in or after except (GH-23568) (#24501)`, the 
public `PyThreadState` struct changed. This breaks ABI compatibility for code 
that is directly accessing the `PyThreadState` struct members, which is not 
uncommon. E.g. in Cython 
.
 This code will fail on 32-bit. On 64-bit it passes because of fortunate struct 
alignment AFAICT.

--
components: Extension Modules, Windows
messages: 390116
nosy: cgohlke, paul.moore, steve.dower, tim.golden, zach.ware
priority: normal
severity: normal
status: open
title: Access violations in C extension modules on Python 3.9.3
type: crash
versions: Python 3.9

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