[issue36880] Returning None from a callback with restype py_object decrements None's refcount too much

[anthony shaw]

anthony shaw <anthonyshaw at apache.org> added the comment:

Thanks Eryk that saved a lot of debugging. 

dgelessus - if you want to write a patch for CPython am happy to take you through this and get it over the line. 

Else: am Happy to write a test against the gc counter and a patch for this

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