My Creator just crashed. I opened Creator's source (master branch), parsing did finish.
Then I checked out a different (way older) branch and rebased it onto master.
While this was happening, Creator asked if it should reload some changed file. I clicked "Yes, all" and Creator started parsing. While it was parsing, I tried to close Creator and it crashed.

Stacktrace of suspicious thread is attached. Looks like the problem is that the value of ent->locker is 0xfdfdfdfd.