Add another guard to address a reported Sentry issue (#810)
Add another guard to address a reported Sentry issue (#810)

I think that we're currently playing whack-a-mole with these exceptions,
but we don't have the bandwidth to rewrite this now. So small fixes
until at least Q1 2017.
fotinakis/travis-web,travis-ci/travis-web,fotinakis/travis-web,fotinakis/travis-web,fotinakis/travis-web,travis-ci/travis-web,travis-ci/travis-web,travis-ci/travis-web