'BuildSphinxTest' object has no attribute 'has_autodoc'

I have install all the packages needed in my machine,and want to build python-pbr ,but when I have a check,I get following error,could it be a bug?
Tips: I have search the google,and didn't find has_autodoc.

The errors like:

[ 250s] ======================================================================
[ 250s] ERROR: test_build_doc (pbr.tests.test_setup.BuildSphinxTest)
[ 250s] pbr.tests.test_setup.BuildSphinxTest.test_build_doc
[ 250s] ----------------------------------------------------------------------
[ 250s] testtools.testresult.real._StringException: Empty attachments:
[ 250s] pythonlogging:''
[ 250s] pythonlogging:'pbr'
[ 250s]
[ 250s] Traceback (most recent call last):
[ 250s] File "/home/abuild/rpmbuild/BUILD/pbr-5.4.5/pbr/tests/test_setup.py", line 299, in test_build_doc
[ 250s] os.path.exists("api/autoindex.rst") == self.has_autodoc)
[ 250s] AttributeError: 'BuildSphinxTest' object has no attribute 'has_autodoc'