[BUG] Inherited instance method has wrong type about cython HOT 3 OPEN

meth = b.plus

This always seemed a bit dodgy to me because it doesn't create a bound method (because you can't really express that in C).

On that basis I'm not sure it's a huge issue - it's something that "works" largely by chance but not something we should encourage because it's misleading.

from cython.

This always seemed a bit dodgy to me because it doesn't create a bound method (because you can't really express that in C).

I imagine. I am creating (and trying to fix this issue) is mainly because of PR #5931 which breaks test due this issue - see comment: #5931 (comment)

from cython.

#2747 (comment) might be related as well. I always considered it hacky that we only remember the cname of final methods separately, instead of having a real Entry available that we can assign to the AttributeNode when we find out that we're referring to a final method.

from cython.