Crash report

The following programs defined a class C. In C, we perform dic clear() operation. When we set state of exception object with the dic, it causes segmentation fault on main branch (68c46ae) and latest stable Python 3.8.14. But it does not trigger any crashing on Python-3.11.0rc2 and Python 3.9.0.

class C(str):
    def __hash__(self):
        d.clear()
        return 0

d = {}
d[C()] = C()

e = Exception()
e.__setstate__(d)

Error messages

Segmentation Fault (Core dumped)

Your environment

• CPython versions tested on: Python 3.8.14 and main branch (68c46ae)
• Operating system and architecture: [GCC 7.5.0] on linux