4.1.0 release: Invalid C++ declaration: Expected identifier in nested name #9433
Description
Describe the bug
After the recent upgrade to 4.1.0, we now get the following error when building documentation for the CCF project (full error in our CI):
Exception occurred:
File "/__w/1/s/env/lib/python3.8/site-packages/sphinx/util/cfamily.py", line 275, in fail
raise self._make_multi_error(errors, '')
sphinx.util.cfamily.DefinitionError: Invalid C++ declaration: Expected identifier in nested name. [error at 8]
typename
This happens when reading heavily-templated C++ sources (src/kv/ folder), documented with Doxygen (1.8.13).
How to Reproduce
$ git clone https://github.com/microsoft/CCF.git
$ cd CCF
$ ./livehtml.sh
Expected behavior
No response
Your project
https://github.com/microsoft/CCF
Screenshots
No response
OS
Linux
Python version
3.8.9
Sphinx version
4.1.0
Sphinx extensions
No response
Extra tools
Doxygen
Additional context
No response