From owner-freebsd-bugs  Tue Aug 11 19:35:54 1998
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Date: Tue, 11 Aug 1998 22:35:15 -0400 (EDT)
From: "Stephen J. Roznowski" <sjr@home.net>
Message-Id: <199808120235.WAA15713@istari.home.net>
To: phk@FreeBSD.ORG, wosch@bento.freebsd.org, phk@FreeBSD.ORG,
        freebsd-bugs@FreeBSD.ORG
Subject: Re: bin/7522
In-Reply-To: Mail from 'Poul-Henning Kamp <phk@FreeBSD.ORG>'
      dated: Mon, 10 Aug 1998 00:31:18 -0700 (PDT)
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> Synopsis: Segmentation fault in BSD find(1)
> 
> State-Changed-From-To: open-suspended
> State-Changed-By: phk
> State-Changed-When: Mon Aug 10 00:30:52 PDT 1998
> State-Changed-Why: 
> sure enough, does it for me too.
> 
> patch & committer sought.

This appears to fix the problem for me:


--- usr.bin/find/operator.c.orig	Tue Aug 11 22:33:34 1998
+++ usr.bin/find/operator.c	Tue Aug 11 22:32:56 1998
@@ -190,12 +190,12 @@
 			int notlevel = 1;
 
 			node = yanknode(&plan);
+			if (node == NULL)
+				errx(1, "!: no following expression");
 			while (node->type == N_NOT) {
 				++notlevel;
 				node = yanknode(&plan);
 			}
-			if (node == NULL)
-				errx(1, "!: no following expression");
 			if (node->type == N_OR)
 				errx(1, "!: nothing between ! and -o");
 			/*


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