But none of the things you mention were part of the requirement. Furthermore, I'd be interested to know how one checks for "bad pointers" and what exactly _you_

But none of the things you mention were part of the requirement. Furthermore, I'd be interested to know how one checks for "bad pointers" and what exactly _you_ mean by that - just NULL, pointers to read-only memory/string literals, or something else (as far as C is concerned, there are no "bad pointers", the system underneath may disagree though). Care to elaborate on how you would've prepared a similar test?