strange thing after call PyObject_CallMethod

[Bug Hunter]

Thank you for so amazing debugging tutorial :).
I owe you a beer.

I found source of problem: then unhandled in python code
exception occurs frame_dealloc() (Objects/frameobject.c:422)
not called. Even if I call PyErr_Print().

But! If I call PyErr_Clear() then all okay!
Docs says that both this functions clears error indicator...
I hit a bug or my brains overheated?

Some gdb output if you are intrested:
Without exception: http://dpaste.com/104973/
With exception: http://dpaste.com/104975/