Ziyue Jiang <[email protected]> added the comment:
I have no detailed code. The way to I produce it is that using
PyType_FromSpec() to generate a type A without the flag
Py_TPFLAGS_DEFAULT(which sets the flag Py_TPFLAGS_HAVE_VERSION_TAG).
Then compile and run in Python.
from my_pkg import A
class Time1(Time):
def __init__(self):
pass
import multiprocessing (This import is a method to 100% reproduce it. Another
way is to use python3-dbg running the code.)
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<https://bugs.python.org/issue44588>
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