[ZeroIntensity]

This is a minor breaking change (isinstance(obj, Hashable) now correctly returns False instead of True), so I'm opting not to backport this.

• Issue: PyCData_Type.tp_hash doesn't use PyObject_HashNotImplemented #78327

[vstinner]

test_ctypes started to fail on AMD64 Windows Server 2025 Clang 3.x: https://buildbot.python.org/#/builders/2261/builds/512

Example:

FAIL: test_unhashable (test.test_ctypes.test_simplesubclasses.Test.test_unhashable) (cls=<class 'ctypes.c_long'>)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "B:\uildarea\3.x.ware-ws2025\build\Lib\test\test_ctypes\test_simplesubclasses.py", line 37, in test_unhashable
    self.assertIsNone(cls.__hash__)
    ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^
AssertionError: <slot wrapper '__hash__' of '_ctypes._CData' objects> is not None

I suspect that it's related to this change.

[ZeroIntensity]

Thanks for the heads-up. I just merged the fix: #159936.