buildbot exception in PyPubSub on ubuntu

[fra...@gmail.com]

The Buildbot has detected a build exception on builder ubuntu while building PyPubSub. Full details are available at:
https://jeromelaheurte.net/buildbot/pubsub/builders/ubuntu/builds/68

Buildbot URL: https://jeromelaheurte.net/buildbot/pubsub/

Buildslave for this Build: Ubuntu

Build Reason: The SingleBranchScheduler scheduler named 'trunk' triggered this build
Build Source Stamp: 369
Blamelist: schoenborno

BUILD FAILED: exception tests coverage coverage_1 upload

Sincerely,
-The Buildbot