Memory leak of NoDefaultType in _typing #123448
Description
Bug report
Bug description:
Quick reproducer:
$ ./python -X showrefcount -c "import _typing"
[8 refs, 0 blocks]
The underlying leaked object is NoDefaultType. I think this was caused by gh-118897 (cc @JelleZijlstra).
CPython versions tested on:
CPython main branch
Operating systems tested on:
Linux