Program received signal SIGSEGV, Segmentation fault.
0xb7301553 in ?? ()
(gdb) bt full
#0  0xb7301553 in ?? ()
No symbol table info available.
#1  0xb7343f30 in ?? ()
No symbol table info available.
#2  0xb7344a0b in ?? ()
No symbol table info available.
#3  0xb7346717 in ?? ()
No symbol table info available.
#4  0x0806f8d7 in ?? ()
No symbol table info available.
#5  0x0806284c in ?? ()
No symbol table info available.
#6  0xb7494ce6 in ?? ()
No symbol table info available.
#7  0x08062441 in ?? ()
No symbol table info available.