Cracking

/build/gdb-cXfXJ3/gdb-7.11.1/gdb/findvar.c:291: internal-error: value_of_register_lazy: Assertion `frame_id_p (get_frame_id (frame))’ failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Quit this debugging session? (y or n)
it happen when i tried to jump over scanf function using ni
any iidea why this happen