[Bug 6873] New: rhg crashes on Python 3.12: undefined symbol: _PyUnicode_Ready

[mercurial-bugs at mercurial-scm.org]

https://bz.mercurial-scm.org/show_bug.cgi?id=6873

            Bug ID: 6873
           Summary: rhg crashes on Python 3.12: undefined symbol:
                    _PyUnicode_Ready
           Product: Mercurial
           Version: 6.7.2
          Hardware: PC
                OS: Linux
            Status: UNCONFIRMED
          Severity: bug
          Priority: wish
         Component: Mercurial
          Assignee: bugzilla at mercurial-scm.org
          Reporter: cedric.krier at b2ck.com
                CC: mercurial-devel at mercurial-scm.org
    Python Version: ---

When running `rhg status` (or any other command) with Python 3.12, I got this
traceback:

Traceback (most recent call last):
  File "/usr/lib/python-exec/python3.12/hg", line 57, in <module>
    from mercurial import dispatch
  File "/usr/lib/python3.12/site-packages/mercurial/dispatch.py", line 24, in
<module>
    from . import (
  File "/usr/lib/python3.12/site-packages/mercurial/cmdutil.py", line 36, in
<module>
    from . import (
  File "/usr/lib/python3.12/site-packages/mercurial/bookmarks.py", line 17, in
<module>
    from . import (
  File "/usr/lib/python3.12/site-packages/mercurial/scmutil.py", line 27, in
<module>
    from . import (
  File "/usr/lib/python3.12/site-packages/mercurial/copies.py", line 16, in
<module>
    from . import (
  File "/usr/lib/python3.12/site-packages/mercurial/match.py", line 17, in
<module>
    from . import (
  File "/usr/lib/python3.12/site-packages/mercurial/pathutil.py", line 23, in
<module>
    rustdirs = policy.importrust('dirstate', 'Dirs')
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/site-packages/mercurial/policy.py", line 138, in
importrust
    mod = _importfrom('rustext', modname)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/site-packages/mercurial/policy.py", line 61, in
_importfrom
    pkg = __import__(pkgname, globals(), fakelocals, [modname], level=1)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ImportError:
/usr/lib/python3.12/site-packages/mercurial/rustext.cpython-312-x86_64-linux-gnu.so:
undefined symbol: _PyUnicode_Ready


Using the same installation but for Python 3.11 does not crash.

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