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bug#11141: 24.0.94; crash with `x-popup-dialog'


From: Andreas Schwab
Subject: bug#11141: 24.0.94; crash with `x-popup-dialog'
Date: Sun, 01 Apr 2012 09:16:57 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.94 (gnu/linux)

Please try this.

Andreas.

        * w32menu.c (is_simple_dialog): Properly check lisp types.

diff --git a/src/w32menu.c b/src/w32menu.c
index b5cc680..b25edf0 100644
--- a/src/w32menu.c
+++ b/src/w32menu.c
@@ -1173,18 +1173,23 @@ w32_dialog_show (FRAME_PTR f, int keymaps,
 static int
 is_simple_dialog (Lisp_Object contents)
 {
-  Lisp_Object options = XCDR (contents);
+  Lisp_Object options;
   Lisp_Object name, yes, no, other;
 
+  if (!CONSP (contents))
+    return 0;
+  options = XCDR (contents);
+
   yes = build_string ("Yes");
   no = build_string ("No");
 
   if (!CONSP (options))
     return 0;
 
-  name = XCAR (XCAR (options));
-  if (!CONSP (options))
+  name = XCAR (options);
+  if (!CONSP (name))
     return 0;
+  name = XCAR (name);
 
   if (!NILP (Fstring_equal (name, yes)))
     other = no;
@@ -1197,7 +1202,10 @@ is_simple_dialog (Lisp_Object contents)
   if (!CONSP (options))
     return 0;
 
-  name = XCAR (XCAR (options));
+  name = XCAR (options);
+  if (!CONSP (name))
+    return 0;
+  name = XCAR (name);
   if (NILP (Fstring_equal (name, other)))
     return 0;
 

-- 
Andreas Schwab, address@hidden
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