Fredrik Lundh writes: #0 0x8077563 in PyObject_Print (op=0x81084fd, fp=0x80dde40, flags=0) at object.c:178 178 else if (op->ob_type->tp_print == NULL) { (gdb) print op->ob_type $1 = (PyTypeObject *) 0x6e697274 (gdb) print op->ob_type->tp_print Cannot access memory at address 0x6e697290. (gdb)