[issue46070] _PyImport_FixupExtensionObject() regression causing a crash in subintepreters

[Dong-hee Na]

Dong-hee Na <donghee.na at python.org> added the comment:

I can reproduce the crash on my macOS with main branch version.

Fatal Python error: Segmentation fault

Thread 0x0000700010389000 (most recent call first):
  File "/Users/user/oss/cpython/bug.py", line 16 in doIt
  File "/Users/user/oss/cpython/Lib/threading.py", line 968 in run
  File "/Users/user/oss/cpython/Lib/threading.py", line 1031 in _bootstrap_inner
  File "/Users/user/oss/cpython/Lib/threading.py", line 988 in _bootstrap

Current thread 0x000070000f386000 (most recent call first):
  File "/Users/user/oss/cpython/bug.py", line 16 in doIt
  File "/Users/user/oss/cpython/Lib/threading.py", line 968 in run
  File "/Users/user/oss/cpython/Lib/threading.py", line 1031 in _bootstrap_inner
  File "/Users/user/oss/cpython/Lib/threading.py", line 988 in _bootstrap

Thread 0x000070000e383000 (most recent call first):
  File "/Users/user/oss/cpython/bug.py", line 16 in doIt
  File "/Users/user/oss/cpython/Lib/threading.py", line 968 in run
  File "/Users/user/oss/cpython/Lib/threading.py", line 1031 in _bootstrap_inner
  File "/Users/user/oss/cpython/Lib/threading.py", line 988 in _bootstrap

Thread 0x000070000d380000 (most recent call first):
  File "/Users/user/oss/cpython/bug.py", line 16 in doIt
  File "/Users/user/oss/cpython/Lib/threading.py", line 968 in run
  File "/Users/user/oss/cpython/Lib/threading.py", line 1031 in _bootstrap_inner
  File "/Users/user/oss/cpython/Lib/threading.py", line 988 in _bootstrap

Thread 0x000000010a590e00 (most recent call first):
  File "/Users/user/oss/cpython/Lib/threading.py", line 1125 in _wait_for_tstate_lock
  File "/Users/user/oss/cpython/Lib/threading.py", line 1105 in join
  File "/Users/user/oss/cpython/bug.py", line 23 in func
  File "/Users/user/oss/cpython/bug.py", line 25 in <module>

Extension modules: _testcapi (total: 1)
[1]    9098 segmentation fault  ./python.exe bug.py

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue46070>
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