From a47072ecedc35bab7a82fe4f88c61c61068129c1 Mon Sep 17 00:00:00 2001
From: Miroslav Stampar <miroslav.stampar@gmail.com>
Date: Sun, 22 Jun 2014 00:09:08 +0200
Subject: [PATCH] Patch for an Issue #732

---
 lib/core/option.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/core/option.py b/lib/core/option.py
index c8e00f8a0..2a4384e71 100644
--- a/lib/core/option.py
+++ b/lib/core/option.py
@@ -1910,7 +1910,7 @@ def _mergeOptions(inputOptions, overrideOptions):
         types_.update(optDict[group])
 
     for key in conf:
-        if key.upper() in _:
+        if key.upper() in _ and key in types_:
             value = _[key.upper()]
 
             if types_[key] == OPTION_TYPE.BOOLEAN: