Program received signal SIGSEGV, Segmentation fault.
0x76ea5b88 in raise () from /lib/libc.so.6
(gdb) bt
#0  0x76ea5b88 in raise () from /lib/libc.so.6
#1  0x00009d18 in ?? ()
#2  0x76e8eef4 in __libc_start_main () from /lib/libc.so.6
#3  0x00009d58 in ?? ()
Cannot access memory at address 0x0
#4  0x00009d58 in ?? ()
Cannot access memory at address 0x0
Backtrace stopped: previous frame identical to this frame (corrupt stack?)