Christian Heimes <li...@cheimes.de> added the comment:
The regression was introduced in commit 8912c182455de83e27d5c120639ec91b18247913
$ git checkout v3.8.4
$ ./configure -C
$ make
$ $ ./python bpo41295.py
Traceback (most recent call last):
File "bpo41295.py", line 14, in <module>
obj.test = True
File "bpo41295.py", line 3, in __setattr__
type.__setattr__(cls, key, value)
TypeError: can't apply this __setattr__ to DefaultMeta object
$ git revert 8912c182455de83e27d5c120639ec91b18247913
[detached HEAD 8d3c7847a0] Revert "bpo-39960: Allow heap types in the "Carlo
Verre" hack check that override "tp_setattro()" (GH-21092) (GH-21339)"
3 files changed, 11 insertions(+), 117 deletions(-)
$ make
$ ./python bpo41295.py
True
----------
keywords: +3.9regression
priority: normal -> release blocker
versions: +Python 3.10, Python 3.9
Added file: https://bugs.python.org/file49316/bpo41295.py
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<https://bugs.python.org/issue41295>
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