From 4f5c02f8d92ff213b71b88f5eb643b7f62b50abc Mon Sep 17 00:00:00 2001
From: Mathias Stearn <mathias@10gen.com>
Date: Wed, 22 Sep 2010 19:22:27 -0400
Subject: Plug memory leak SERVER-1827

---
 db/query.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/db/query.cpp b/db/query.cpp
index 5bd7b00ac2a..1cbf97d4be9 100644
--- a/db/query.cpp
+++ b/db/query.cpp
@@ -787,8 +787,10 @@ namespace mongo {
             if ( _pq.isExplain()) {
                 _eb.noteScan( _c.get(), _nscanned, _nscannedObjects, _n, scanAndOrderRequired(), _curop.elapsedMillis(), useHints && !_pq.getHint().eoo() );
             } else {
-                _response.appendData( _buf.buf(), _buf.len() );
-                _buf.decouple();
+                if (_buf.len()) {
+                    _response.appendData( _buf.buf(), _buf.len() );
+                    _buf.decouple();
+                }
             }
             if ( stop ) {
                 setStop();
-- 
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