From f2936d729f18aff49fa6db84ecf92ab5bc83268f Mon Sep 17 00:00:00 2001
From: "H. Peter Anvin" <hpa@zytor.com>
Date: Wed, 4 Jun 2008 15:11:23 -0700
Subject: [PATCH] Fix double free in %depend

---
 preproc.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/preproc.c b/preproc.c
index 4052672..475cb7e 100644
--- a/preproc.c
+++ b/preproc.c
@@ -1840,7 +1840,7 @@ static int do_directive(Token * tline)
     origline = tline;
 
     skip_white_(tline);
-    if (!tok_type_(tline, TOK_PREPROC_ID) ||
+    if (!tline || !tok_type_(tline, TOK_PREPROC_ID) ||
         (tline->text[1] == '%' || tline->text[1] == '$'
          || tline->text[1] == '!'))
         return NO_DIRECTIVE_FOUND;
@@ -2093,7 +2093,6 @@ static int do_directive(Token * tline)
         if (!t || (t->type != TOK_STRING &&
                        t->type != TOK_INTERNAL_STRING)) {
             error(ERR_NONFATAL, "`%%depend' expects a file name");
-	    free_tlist(t);
             free_tlist(origline);
             return DIRECTIVE_FOUND;     /* but we did _something_ */
         }
@@ -2110,7 +2109,6 @@ static int do_directive(Token * tline)
 	    *deptail = sl;
 	    deptail = &sl->next;
 	}
-	free_tlist(t);
 	free_tlist(origline);
         return DIRECTIVE_FOUND;
 
-- 
2.7.4