griffon/griffon-fest-plugin — pull request #1 by marcoVermeulen (2012-08-19 13:23:53+00:00)
Title: Invoke execInsideUISync() instead of execSync() on ThreadingHandler.

I think this is due to a refactor that happened. I noticed that the methods were called execOutsideSync and execSync before. I deduced that execSync must be replaced by execInsideSync.