Crash report

Whenproperty methodsgetter(),setter() ordeleter() are called with None as argument, they callPy_XDECREF() on it. Now, when None is immortal, it perhaps have no effect, but in earlier Python versions it could have bad consequences. It was not reported earlier only because nobody normally calls them with None.

Linked PRs

• gh-115618: Remove improper Py_XDECREFs in property methods #115619
• [3.12] gh-115618: Remove improper Py_XDECREFs in property methods (GH-115619) #115620
• [3.11] gh-115618: Remove improper Py_XDECREFs in property methods (GH-115619) #115621