1 files changed, 8 insertions, 5 deletions
diff --git a/src/qml/jsruntime/qv4proxy.cpp b/src/qml/jsruntime/qv4proxy.cpp
index d4f342c50e..19e46304af 100644
--- a/src/qml/jsruntime/qv4proxy.cpp
+++ b/src/qml/jsruntime/qv4proxy.cpp
@@ -277,9 +277,10 @@ PropertyAttributes ProxyObject::virtualGetOwnProperty(Managed *m, PropertyKey id
     ObjectPrototype::toPropertyDescriptor(scope.engine, trapResult, resultDesc, &resultAttributes);
     resultDesc->fullyPopulated(&resultAttributes);
 
-    // ###
-    //Let valid be IsCompatiblePropertyDescriptor(extensibleTarget, resultDesc, targetDesc).
-    //If valid is false, throw a TypeError exception.
+    if (!targetDesc->isCompatible(targetAttributes, resultDesc, resultAttributes)) {
+        scope.engine->throwTypeError();
+        return Attr_Invalid;
+    }
 
     if (!resultAttributes.isConfigurable()) {
         if (targetAttributes == Attr_Invalid || !targetAttributes.isConfigurable()) {
@@ -336,8 +337,10 @@ bool ProxyObject::virtualDefineOwnProperty(Managed *m, PropertyKey id, const Pro
             return false;
         }
     } else {
-        // ###
-        // if IsCompatiblePropertyDescriptor(extensibleTarget, Desc, targetDesc) is false throw a type error.
+        if (!targetDesc->isCompatible(targetAttributes, p, attrs)) {
+            scope.engine->throwTypeError();
+            return false;
+        }
         if (settingConfigFalse && targetAttributes.isConfigurable()) {
             scope.engine->throwTypeError();
             return false;