[tahoe-lafs-trac-stream] [Tahoe-LAFS] #2934: The towncrier step fails sometimes

[Tahoe-LAFS]

#2934: The towncrier step fails sometimes
---------------------+---------------------------
 Reporter:  exarkun  |          Owner:
     Type:  defect   |         Status:  new
 Priority:  normal   |      Milestone:  undecided
Component:  unknown  |        Version:  1.12.1
 Keywords:           |  Launchpad Bug:
---------------------+---------------------------
 For reasons unknown:

 {{{
 Traceback (most recent call last):
   File "/opt/python/2.7.14/lib/python2.7/runpy.py", line 174, in
 _run_module_as_main
     "__main__", fname, loader, pkg_name)
   File "/opt/python/2.7.14/lib/python2.7/runpy.py", line 72, in _run_code
     exec code in run_globals
   File "/home/travis/build/LeastAuthority/tahoe-
 lafs/.tox/codechecks/lib/python2.7/site-packages/towncrier/check.py", line
 86, in <module>
     _main()
   File "/home/travis/build/LeastAuthority/tahoe-
 lafs/.tox/codechecks/lib/python2.7/site-packages/click/core.py", line 722,
 in __call__
     return self.main(*args, **kwargs)
   File "/home/travis/build/LeastAuthority/tahoe-
 lafs/.tox/codechecks/lib/python2.7/site-packages/click/core.py", line 697,
 in main
     rv = self.invoke(ctx)
   File "/home/travis/build/LeastAuthority/tahoe-
 lafs/.tox/codechecks/lib/python2.7/site-packages/click/core.py", line 895,
 in invoke
     return ctx.invoke(self.callback, **ctx.params)
   File "/home/travis/build/LeastAuthority/tahoe-
 lafs/.tox/codechecks/lib/python2.7/site-packages/click/core.py", line 535,
 in invoke
     return callback(*args, **kwargs)
   File "/home/travis/build/LeastAuthority/tahoe-
 lafs/.tox/codechecks/lib/python2.7/site-packages/towncrier/check.py", line
 26, in _main
     return __main(compare_with, directory)
   File "/home/travis/build/LeastAuthority/tahoe-
 lafs/.tox/codechecks/lib/python2.7/site-packages/towncrier/check.py", line
 35, in __main
     _run(["git", "diff", "--name-only", comparewith + "..."],
 cwd=base_directory)
   File "/home/travis/build/LeastAuthority/tahoe-
 lafs/.tox/codechecks/lib/python2.7/site-packages/towncrier/check.py", line
 19, in _run
     return check_output(args, **kwargs)
   File "/opt/python/2.7.14/lib/python2.7/subprocess.py", line 219, in
 check_output
     raise CalledProcessError(retcode, cmd, output=output)
 subprocess.CalledProcessError: Command '['git', 'diff', '--name-only',
 u'origin/master...']' returned non-zero exit status 128
 ERROR: InvocationError for command '/home/travis/build/LeastAuthority
 /tahoe-lafs/.tox/codechecks/bin/python -m towncrier.check' (exited with
 code 1)
 }}}

 Only in certain build environments.

--
Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/2934>
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