From 5ee1d75f0a8f5fc7fc01e4ca54116f4666493027 Mon Sep 17 00:00:00 2001
From: Eric Melville <eric@FreeBSD.org>
Date: Thu, 26 Feb 2004 01:52:39 +0000
Subject: Test data before using it.

Of course, libdialog is still chock-full of similar bugs, but it's been
multiple years and no one has any better suggestions so the bugs will just
be dealt with case-by-case.

PR:	28221
---
 gnu/lib/libdialog/menubox.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gnu/lib/libdialog/menubox.c b/gnu/lib/libdialog/menubox.c
index 57039655495c7..a01acd5760880 100644
--- a/gnu/lib/libdialog/menubox.c
+++ b/gnu/lib/libdialog/menubox.c
@@ -25,6 +25,7 @@ __FBSDID("$FreeBSD$");
 
 #include <dialog.h>
 #include "dialog.priv.h"
+#include <err.h>
 #include <ncurses.h>
 
 static void print_item(WINDOW *win, unsigned char *tag, unsigned char *item, int choice, int selected, dialogMenuItem *me, int menu_width, int tag_x, int item_x);
@@ -442,6 +443,9 @@ static void
 print_item(WINDOW *win, unsigned char *tag, unsigned char *item, int choice, int selected, dialogMenuItem *me, int menu_width, int tag_x, int item_x)
 {
     int i;
+
+    if (tag == NULL)
+	errx(1, "bad parameter to print_item()\n");
     
     /* Clear 'residue' of last item */
     wattrset(win, menubox_attr);
-- 
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