Probably caused by revision deletion of the page?
https://travis-ci.org/wikimedia/pywikibot-core/jobs/43590174
======================================================================
ERROR: testLogEvents (tests.site_tests.SiteUserTestCase)
Test the site.logevents() method.
----------------------------------------------------------------------
Traceback (most recent call last):
File "/home/travis/build/wikimedia/pywikibot-core/tests/site_tests.py", line 732, in testLogEvents
for entry in mysite.logevents(logtype=typ, total=3):
File "/home/travis/build/wikimedia/pywikibot-core/pywikibot/data/api.py", line 1512, in __iter__
yield self.result(item)
File "/home/travis/build/wikimedia/pywikibot-core/pywikibot/data/api.py", line 1710, in result
return self.entryFactory.create(pagedata)
File "/home/travis/build/wikimedia/pywikibot-core/pywikibot/logentries.py", line 294, in create
return self._creator(logdata)
File "/home/travis/build/wikimedia/pywikibot-core/pywikibot/logentries.py", line 283, in <lambda>
self._creator = lambda data: logclass(data, self._site)
File "/home/travis/build/wikimedia/pywikibot-core/pywikibot/logentries.py", line 98, in __init__
pos = self.data['title'].find('#')
File "/home/travis/build/wikimedia/pywikibot-core/pywikibot/logentries.py", line 28, in __missing__
raise KeyError("Log entry has no '%s' key" % key, key)
KeyError: ("Log entry has no 'title' key", 'title')