Yeah it's possible, how to proceed is at your discretion.  Travis will block this until it gets sorted out, and I don't see any other particularly active pulls open to this repo.  I would probably try and find the problem as it may be some time before some else has to and a way in is opened for your pull.  To start I would set up an environment running HEAD and run tests locally for debugging.  Also sometimes tests are unreliable as they pull from many sources it may be wise to try restarting the Travis run before going too deep here.