From 0751fea95578c17539d152415659b029f67bc3b7 Mon Sep 17 00:00:00 2001
From: Philip Guenthe <guenther@cvs.openbsd.org>
Date: Fri, 26 Jun 2009 22:03:18 +0000
Subject: undefine() leaves the hash entry for the macro (for use by builtin())
 and only deletes the definition; macro_for_all needs to skip those to keep
 dumpdef() from segving

ok and regress test by espie (thanks!)
---
 usr.bin/m4/look.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'usr.bin')

diff --git a/usr.bin/m4/look.c b/usr.bin/m4/look.c
index a9bfe1e5433..c99cc1a8ae9 100644
--- a/usr.bin/m4/look.c
+++ b/usr.bin/m4/look.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: look.c,v 1.18 2006/01/20 23:10:19 espie Exp $	*/
+/*	$OpenBSD: look.c,v 1.19 2009/06/26 22:03:17 guenther Exp $	*/
 
 /*
  * Copyright (c) 1989, 1993
@@ -223,7 +223,8 @@ macro_for_all(void (*f)(const char *, struct macro_definition *))
 
 	for (n = ohash_first(&macros, &i); n != NULL; 
 	    n = ohash_next(&macros, &i))
-		f(n->name, n->d);
+		if (n->d != NULL)
+			f(n->name, n->d);
 }
 
 void 
-- 
cgit v1.2.3