object no longer passed to sys.unraisablehook

[graingert]

Bug report

Bug description:

given

import gc
import sys

class Foo:
    def __del__(self):
        raise ValueError("__del__ is broken")


def main():
    v = None
    def unraisablehook(unraisable_arg):
        nonlocal v
        v = unraisable_arg

    sys.unraisablehook = unraisablehook
    Foo()
    gc.collect()
    print(v.object)


if __name__ == "__main__":
    sys.exit(main())

On Python 3.13 you get <function Foo.__del__ at 0x7181347936a0> on 3.14 you get None

CPython versions tested on:

3.14

Operating systems tested on:

Linux

[graingert]

sometime between v3.14.0a4 and v3.14.0a5

[graingert]

bisected to a25042e

[graingert]

looks intentional:

The drawback is that it changes sys.unraisablehook arguments: the object is no longer set. In my PR, I had to update multiple tests to check err_msg (string) instead.

[graingert]

closing this as not planed because it's an intentional change