From 2ce746e7dd64fc36b0767bd0551d2a6b7349a669 Mon Sep 17 00:00:00 2001
From: Colin Walters <walters@verbum.org>
Date: Thu, 20 May 2010 17:06:30 -0400
Subject: [PATCH] [ShellAppSystem] Don't crash if the menu system is empty

This is a bit pathological, but if your menu tree is empty, we
shouldn't crash.
---
 src/shell-app-system.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/src/shell-app-system.c b/src/shell-app-system.c
index ad8cef47d..faa960e55 100644
--- a/src/shell-app-system.c
+++ b/src/shell-app-system.c
@@ -309,9 +309,15 @@ reread_entries (ShellAppSystem     *self,
   g_slist_free (*cache);
   *cache = NULL;
 
-  *cache = gather_entries_recurse (self, *cache, unique, trunk);
-
-  gmenu_tree_item_unref (trunk);
+  if (!trunk)
+    {
+      *cache = NULL;
+    }
+  else
+    {
+      *cache = gather_entries_recurse (self, *cache, unique, trunk);
+      gmenu_tree_item_unref (trunk);
+    }
 }
 
 static void