The docs for the hash() builtin use :meth:`__hash__`, but this doesn't actually link to the datamodel documentation for __hash__: it needs :meth:`~object.__hash__` instead.

I'm fixing this in the builtin functions docs, but there are probably more places.

Why don't we warn when a :meth: link doesn't actually create a link?

There are a lot of places in the rest of the docs that have the same problem:

Doc % git grep ':meth:`__' | grep -v whatsnew | wc -l
     610

I wonder if we can make the :meth: role globally default to linking to object.__dunder__. Would that require a change to Sphinx?

It's 3.10 only. Presumably our sphinx version changed then and something broke. In 3.9 and earlier the links are all fine.

See https://bugs.python.org/issue42182 for a similar issue I raised ages ago.