STINNER Victor <[email protected]> added the comment:
I marked bpo-46034 as a duplicate: setting a class "__init__" attribute doesn't
update properly its tp_init slot. update_slot() of Objects/typeobject.c only
uses a fast pointer comparison since both strings are interned, but the test
fails if the two strings are part of two different Python interpreters.
In bpo-46034 case, the problem is that the "slotdefs" array uses interned
strings created in the main interpreter, whereas the update_slot() name
parameter (Python string) was created in a sub-interpreter.
Reproducer:
=========================================
import _testcapi
code = r"""class Greeting():
pass
def new_init(inst, name):
inst.text = f"Hello, {name}\n"
Greeting.__init__ = new_init
Greeting("Miro")"""
_testcapi.run_in_subinterp(code)
=========================================
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Python tracker <[email protected]>
<https://bugs.python.org/issue46006>
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