New submission from Serhiy Storchaka <storchaka+cpyt...@gmail.com>:
The following example crashes:
class TypeVar:
@property
def __module__(self):
1/0
str | TypeVar()
Output:
Fatal Python error: _Py_CheckSlotResult: Slot | of type type succeeded with an
exception set
Python runtime state: initialized
Traceback (most recent call last):
File "<stdin>", line 4, in __module__
ZeroDivisionError: division by zero
Aborted (core dumped)
The problem in Objects/unionobject.c is that is_typing_module() (and therefore
is_typevar() and is_special_form()) can return not only 0 and 1, but -1 as a
signal of error, but is_unionable() does not check results for error and
interprets it as boolean true.
----------
assignee: serhiy.storchaka
components: Interpreter Core
messages: 396307
nosy: serhiy.storchaka
priority: normal
severity: normal
status: open
title: Fatal error in type union
type: crash
versions: Python 3.10, Python 3.11
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue44483>
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