From: utzoo!decvax!harpo!seismo!hao!csu-cs!silver
Newsgroups: net.unix-wizards
Title: nil pointer deref leads to non-nil responses!
Article-I.D.: csu-cs.1991
Posted: Thu Jan 20 13:06:33 1983
Received: Fri Jan 21 03:11:13 1983

Thanks for all the responses!  Whew!  That'll make me think twice
about asking a question again (sure, it will...)  

Anyway, it seems that everyone agrees that nil pointer derefs are
poor practice; many systems trap them; and, as I suspected, in some
cases, a nil pointer (i.e., int *a; a = 0) does point to real,
modifiable memory.  In some cases on the same systems (dep. on
ld options), you get a signal if you commit this heinous crime.

Some people didn't realize that I asked the question cause my system
does trap the attempt, so I couldn't "try it".

OK?  No more mail please?  (~@

Alan Silverstein