Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!wuarchive!udel!haven!adm!smoke!gwyn
From: gwyn@smoke.brl.mil (Doug Gwyn)
Newsgroups: comp.lang.c
Subject: Re: Deleting linked lists.
Message-ID: <15600@smoke.brl.mil>
Date: 27 Mar 91 21:31:12 GMT
References: <2636@borg.cs.unc.edu>
Organization: U.S. Army Ballistic Research Laboratory, APG, MD.
Lines: 12

In article <2636@borg.cs.unc.edu> warner@weiss.cs.unc.edu (Byron Warner) writes:
>	free(ptr);
>	ptr = ptr->next;
>I am not sure if I can assume that
>the value of ptr will not be corrupted
>after it is freed.

It's not ptr, but rather the region of storage to which ptr points,
that can be clobbered by the call to free().

Indeed I made this mistake once (in an early release of my dirent
implementation).  I knew better, I just forgot.