From f961339cf5b9faf4a135b0cb613360ed8a737824 Mon Sep 17 00:00:00 2001
From: Jim Menard <jim@10gen.com>
Date: Tue, 9 Dec 2008 14:47:34 -0500
Subject: [PATCH] Raise an error if cursor returns $err.

---
 lib/mongo/cursor.rb | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/mongo/cursor.rb b/lib/mongo/cursor.rb
index 0ea1b07..329fb5c 100644
--- a/lib/mongo/cursor.rb
+++ b/lib/mongo/cursor.rb
@@ -39,7 +39,9 @@ module XGen
 
         def next_object
           refill_via_get_more if num_remaining == 0
-          @objects.shift
+          o = @objects.shift
+          raise o['$err'] if o['$err']
+          o
         end
 
         def each