Comment 4 for bug 889048

I hit this too. I'm not sure why you closed this because it is a fact the failure message is unclear. There are several ways you can hit it.

I put up https://code.launchpad.net/~mbp/rabbitfixture/rabbit-startup/+merge/80285 which gives a some what better message. It is not yet deployed in lp.

Robert suggests dumping the fixture details which will give more information and be more robust.