QML application crashing after update to 5.2.1 and 5.2.2

Hello, I’ve tried to update from Qt 5.2.0 to Qt 5.2.1 but my application started crashing on almost every state change. Now I have Qt 5.2.2 from git and the problem is the same, I keep crashing on QV4::FunctionObject::creatScriptFunction almost every time I do some state change. Application runs fine with Qt 5.2.0 (apart from crashes when using network which should be fixed in 5.2.1). What can I do to find out what’s wrong? Thanks!