┌────────────────────────────────────────────────────────────────────┐
│ SageMath version 9.5.beta8, Release Date: 2021-12-12               │
│ Using Python 3.10.1. Type "help()" for help.                       │
└────────────────────────────────────────────────────────────────────┘
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┃ Warning: this is a prerelease version, and it may be unstable.     ┃
┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
sage: from sage_docbuild import DocBuilder, setup_parser, ReferenceSubBuilder
sage: DocBuilder._options = setup_parser().parse_args([])
sage: import sage_docbuild.sphinxbuild
sage: def raiseBaseException():
....:     raise BaseException("abort pool operation")
....: 
sage: original_runsphinx, sage_docbuild.sphinxbuild.runsphinx = sage_docbuild.sphinxbuild.runsphinx, raiseBaseException
sage: ReferenceSubBuilder("docname", "en")._wrapper("html")
---------------------------------------------------------------------------
PermissionError                           Traceback (most recent call last)
<ipython-input-11-7faec88fcc76> in <module>
----> 1 ReferenceSubBuilder("docname", "en")._wrapper("html")

/usr/lib/sage-9.5.beta8/local/var/lib/sage/venv-python3.10/lib/python3.10/site-packages/sage_docbuild/__init__.py in _wrapper(self, build_type, *args, **kwds)
    797         cache['option_inherited'] = self._options.inherited
    798         cache['option_underscore'] = self._options.underscore
--> 799         self.save_cache()
    800 
    801         # After "sage -clone", refresh the reST file mtimes in

/usr/lib/sage-9.5.beta8/local/var/lib/sage/venv-python3.10/lib/python3.10/site-packages/sage_docbuild/__init__.py in save_cache(self)
    857         """
    858         cache = self.get_cache()
--> 859         with open(self.cache_filename(), 'wb') as file:
    860             pickle.dump(cache, file)
    861         logger.debug("Saved the reference cache: %s", self.cache_filename())

PermissionError: [Errno 13] Permission denied: '/usr/lib/sage-9.5.beta8/local/share/doc/sage/doctrees/en/docname/reference.pickle'