From 1058df99ea2ba81e0201b8d7ae25ae93ec5b7730 Mon Sep 17 00:00:00 2001
From: JoelKatz <DavidJoelSchwartz@GMail.com>
Date: Sat, 13 Apr 2013 21:53:35 -0700
Subject: [PATCH] Reject objects with duplicate keys.

---
 src/cpp/json/json_reader.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/cpp/json/json_reader.cpp b/src/cpp/json/json_reader.cpp
index 3623e71d7..cff2ed384 100644
--- a/src/cpp/json/json_reader.cpp
+++ b/src/cpp/json/json_reader.cpp
@@ -505,6 +505,11 @@ Reader::readObject( Token &tokenStart )
                                     colon, 
                                     tokenObjectEnd );
       }
+
+      // Reject duplicate names
+      if (currentValue().isMember(name))
+        return addError( "Key '" + name + "' appears twice.", tokenName );
+
       Value &value = currentValue()[ name ];
       nodes_.push( &value );
       bool ok = readValue();