strlen on a NULL

[Richard H. Gumpertz]

> If I do a strlen on a NULL pointer I get a coredump.
> I have the same code running on a few *other* Unix machines with
> exhibiting this behaviour.
> OK, so I could tidy it up, but I wondered is this an oversight or the
> correct behaviour?

You may, if you wish, consider this a feature: all simple references through
NULL pointers are detected.  This lets you know there is a problem and so you
can fix your bugs!  :-)

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