gh-113157 gh-89519: Fix method descriptors by rhettinger · Pull Request #113233 · python/cpython
Fix yet another problem created by classmethod descriptor chaining. This completes the work in gh-89519, fixes the bug reported in gh-113157, and get us back to the stable and correct semantics in Python 3.9.
There is still an open question about what if anything to do for Python 3.11 and Python 3.12. We can' t backport this without breaking something else.