The crash is an Heisenbug (read object which just has been destroyed, 
sometimes it works, sometimes it crash), so it's not easy the write a 
short example showing the crash.

The code looks like:

   import cProfile
   prof = cProfile.Profile()
   prof.enable()
   prof.clear()

The next instruction will be analyzed by the profiler, but the profiler 
will crash in: ptrace_enter_call()->initContext()->getSubEntry()-
>Rotating_Tree_Get(&caller->calls, entry), because caller->calls node is 
invalid.