From d0a0019668cc7eef8f5cbc5d2c6e7dbbc1522da6 Mon Sep 17 00:00:00 2001
From: "Jay Freeman (saurik)" <saurik@saurik.com>
Date: Sun, 18 Oct 2009 06:16:30 +0000
Subject: [PATCH] CYJSObject objectForKey: should be returning nil for
 undefined keys.

---
 Library.mm | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Library.mm b/Library.mm
index 8116d53..92e43ed 100644
--- a/Library.mm
+++ b/Library.mm
@@ -1434,7 +1434,10 @@ bool CYIsCallable(JSContextRef context, JSValueRef value) {
 }
 
 - (id) objectForKey:(id)key {
-    return CYCastNSObject(NULL, context_, CYGetProperty(context_, object_, CYJSString(key))) ?: [NSNull null];
+    JSValueRef value(CYGetProperty(context_, object_, CYJSString(key)));
+    if (JSValueIsUndefined(context_, value))
+        return nil;
+    return CYCastNSObject(NULL, context_, value) ?: [NSNull null];
 }
 
 - (NSEnumerator *) keyEnumerator {
-- 
2.49.0