Crash in ClangCodeModel while editing a document

The Application has crashed on me on several random occasions while editing C++ code with Clang Code Model activated.

I use git master branch, the exact revision is 82e25e71c868a00929ed697659a2a21b4cdce0c1

The crash seems to happen when releasing document resources inside the ClangCodeModel. I captured a backtrace of the crash as well as a replay from QtC to get a nicer visual.