buildbot/buildbot — pull request #412 by tomprince (2012-05-18 18:34:37+00:00)
Title: Warn about non-jsonable properties.

Once builds are stored in the database, properties that are not
jsonable won't be supported. As it is, there are many places that
don't like non-jsonable properties. Provide a warning for now, to
allow people notice of the change.