=> 0xb72130a8:	Cannot access memory at address 0xb72130a8
$2 = -99Python Exception <class 'gdb.MemoryError'> Cannot access memory at address 0xb6fd9bd0: 
.
#0  0xb72130a8 in ?? ()
No symbol table info available.
Cannot access memory at address 0xb6fd9bd0