The current travis build shows an error caused by the "mail:" found on the Main Page of English Wikipedia
The first travis build to exhibit this bug is
https://travis-ci.org/wikimedia/pywikibot-core/jobs/30562987
which is this changeset
https://gerrit.wikimedia.org/r/#/c/145691/
There has been one fixup committed
https://git.wikimedia.org/commit/pywikibot%2Fcore.git/5aa0d76a6f1c2dde140bbf6758fa4ddd420a47ab
but that leaves mail: still not working, and the tests still failing.
Version: core-(2.0)
Severity: normal