For example
https://docs.python.org/3.10/c-api/bool.html?highlight=pydict_new#c.PyDict_New

should display 

`Return value: New reference.`

but not, this looks like a regression bug.

other version display `Return value: New reference.` very well.

This is the regression bug caused by sphinx==3.2.1
If we roll back the sphinx version(2.4.4), it is okay.
I am investigating what causes this issue.

sphinx2
(Pdb) par[0].attributes
{'ids': ['c._PyObject_New'], 'classes': [], 'names': ['c._PyObject_New'], 'dupnames': [], 'backrefs': [], 'first': False}

sphinx3
(Pdb) par[0].attributes
{'ids': ['c._PyObject_New'], 'classes': [], 'names': [], 'dupnames': [], 'backrefs': [], 'is_multiline': True}

We are using the names attribute for annotation.

One more regression is that
code background highlight is not applied after sphinx version3

See
https://docs.python.org/3.10/c-api/dict.html#c.PyDict_Next
https://docs.python.org/3.9/c-api/dict.html#c.PyDict_Next

Okay this is the theme bug.
https://github.com/python/python-docs-theme/pull/57

@pablogsal

Since this is the developer guide of 3.10.
I would like to suggest as release bloker, if you don't agree you can change it ;)

> I would like to suggest as release bloker, if you don't agree you can change it ;)

This is indeed a release blocker, but likely for the beta/release candidate phases.

> but likely for the beta/release candidate phases.

I think so too

New changeset 09490a109faaee9cc393b52742a8575c116c56ba by Dong-hee Na in branch 'master':
bpo-42042: Use ids attribute instead of names attribute (GH-22739)
https://github.com/python/cpython/commit/09490a109faaee9cc393b52742a8575c116c56ba

New changeset 5ad468d4a8cfeb8a320659016964c23735c12a07 by Miss Islington (bot) in branch '3.8':
bpo-42042: Use ids attribute instead of names attribute (GH-22739)
https://github.com/python/cpython/commit/5ad468d4a8cfeb8a320659016964c23735c12a07

New changeset 0f4dd87a31130b245ec4c6ded9fd6f247e700c0d by Dong-hee Na in branch '3.9':
[3.9] bpo-42042: Use ids attribute instead of names attribute (GH-22739) (GH-23265)
https://github.com/python/cpython/commit/0f4dd87a31130b245ec4c6ded9fd6f247e700c0d

Is it fixed?

@mdk

No https://github.com/python/python-docs-theme/pull/57 must be fixed ;)

The code background highlights really do need to be restored.  Readability has been significantly impaired in 3.10.

https://github.com/python/python-docs-theme/pull/57 is landed. We just need a new release of the package to pypi

@pablogsal @rhettinger @mdk @Mariatta

Cool!! everything looks okay!
Now I close this issue.

Thank you to everyone who works on this issue!!