<string>:53: RuntimeWarning: More than 20 figures have been opened. Figures created through the pyplot interface (`matplotlib.pyplot.figure`) are retained until explicitly closed and may consume too much memory. (To control this warning, see the rcParam `figure.max_open_warning`).
<string>:1: RuntimeWarning: More than 20 figures have been opened. Figures created through the pyplot interface (`matplotlib.pyplot.figure`) are retained until explicitly closed and may consume too much memory. (To control this warning, see the rcParam `figure.max_open_warning`).
<string>:53: RuntimeWarning: More than 20 figures have been opened. Figures created through the pyplot interface (`matplotlib.pyplot.figure`) are retained until explicitly closed and may consume too much memory. (To control this warning, see the rcParam `figure.max_open_warning`).
/var/lib/gitlab-runner/builds/c098b1de/0/count0/graph-tool/doc/price.py:94: RuntimeWarning: More than 20 figures have been opened. Figures created through the pyplot interface (`matplotlib.pyplot.figure`) are retained until explicitly closed and may consume too much memory. (To control this warning, see the rcParam `figure.max_open_warning`).
  figure(figsize=(6,4))
/var/lib/gitlab-runner/builds/c098b1de/0/count0/graph-tool/doc/price.py:104: UserWarning: tight_layout : falling back to Agg renderer
  tight_layout()
<string>:53: RuntimeWarning: More than 20 figures have been opened. Figures created through the pyplot interface (`matplotlib.pyplot.figure`) are retained until explicitly closed and may consume too much memory. (To control this warning, see the rcParam `figure.max_open_warning`).
ERROR: Job failed: exit status 1

 1178 tests
    3 failures in tests
    0 failures in setup code
    0 failures in cleanup code
build finished with problems, 19 warnings.
<string>:53: RuntimeWarning: More than 20 figures have been opened. Figures created through the pyplot interface (`matplotlib.pyplot.figure`) are retained until explicitly closed and may consume too much memory. (To control this warning, see the rcParam `figure.max_open_warning`).
<string>:53: RuntimeWarning: More than 20 figures have been opened. Figures created through the pyplot interface (`matplotlib.pyplot.figure`) are retained until explicitly closed and may consume too much memory. (To control this warning, see the rcParam `figure.max_open_warning`).
<string>:53: RuntimeWarning: More than 20 figures have been opened. Figures created through the pyplot interface (`matplotlib.pyplot.figure`) are retained until explicitly closed and may consume too much memory. (To control this warning, see the rcParam `figure.max_open_warning`).
ERROR: Job failed: exit status 1

Exception occurred:
  File "/usr/lib/python2.7/site-packages/sphinx/ext/autodoc/__init__.py", line 82, in members_option
    return [x.strip() for x in arg.split(',')]
AttributeError: 'bool' object has no attribute 'split'
The full traceback has been saved in /tmp/sphinx-err-7trLUa.log, if you want to report the issue to the developers.
Please also report this if it was a user error, so that a better error message can be provided next time.
A bug report can be filed in the tracker at <https://github.com/sphinx-doc/sphinx/issues>. Thanks!
ERROR: Job failed: exit status 1

Exception occurred:
  File "/usr/lib/python2.7/site-packages/sphinx/ext/autodoc/__init__.py", line 82, in members_option
    return [x.strip() for x in arg.split(',')]
AttributeError: 'bool' object has no attribute 'split'
The full traceback has been saved in /tmp/sphinx-err-ahV_Fs.log, if you want to report the issue to the developers.
Please also report this if it was a user error, so that a better error message can be provided next time.
A bug report can be filed in the tracker at <https://github.com/sphinx-doc/sphinx/issues>. Thanks!
ERROR: Job failed: exit status 1