buildbot/buildbot — pull request #411 by tomprince (2012-05-16 22:37:04+00:00)
Title: Force build race

The force scheduler wasn't waiting for the source stamp to be added
to the database before adding the buildset.

This doesn't have tests, but the only way I can see to test it would be to delay some but not all of the db calls. In particular `addSourceStamp` needs to be delayed, but not `addBuildsetForSourceStamp`.