The first bit "com.cannonical" is OS related.
The last bit "refcount" could be a consequence of the crash. Strange though, I would have expected it before the crash.
Did you press any button, and could you be inside that button's "OnClick" (or MouseDown/Up) code?
As for the Access-violation. This is what would stop the app in the debugger.
If you are in some package for which no debug info was generated then you want see any sources. (You can add debug info to most packages, using "Additions and Overrides".
Have you opened the debuggers stack window? What does it show?