Array.of has to use defineOwnProperty instead of set (found while wor…

…king on proxy support)

src/org/mozilla/javascript/NativeArray.java

@@ -848,8 +848,16 @@ private static Object js_of(Context cx, Scriptable scope, Scriptable thisObj, Ob
         final Scriptable result =
                 callConstructorOrCreateArray(cx, scope, thisObj, args.length, true);
 
-        for (int i = 0; i < args.length; i++) {
-            defineElem(cx, result, i, args[i]);
+        if (cx.getLanguageVersion() >= Context.VERSION_ES6 && result instanceof ScriptableObject) {
+            ScriptableObject desc = ScriptableObject.buildDataDescriptor(result, null, EMPTY);
+            for (int i = 0; i < args.length; i++) {
+                desc.put("value", desc, args[i]);
+                ((ScriptableObject) result).defineOwnProperty(cx, i, desc);
+            }
+        } else {
+            for (int i = 0; i < args.length; i++) {
+                defineElem(cx, result, i, args[i]);
+            }
         }
         setLengthProperty(cx, result, args.length);
 

testsrc/test262.properties

@@ -1,6 +1,6 @@
 # This is a configuration file for Test262SuiteTest.java. See ./README.md for more info about this file
 
-built-ins/Array 179/2670 (6.7%)
+built-ins/Array 177/2670 (6.63%)
     from/calling-from-valid-1-noStrict.js non-strict Spec pretty clearly says this should be undefined
     from/elements-deleted-after.js Checking to see if length changed, but spec says it should not
     from/iter-map-fn-this-non-strict.js non-strict Error propagation needs work in general
@@ -18,9 +18,7 @@ built-ins/Array 179/2670 (6.7%)
     length/define-own-prop-length-coercion-order-set.js {unsupported: [Reflect, Reflect.set]}
     length/define-own-prop-length-no-value-order.js {unsupported: [Reflect]}
     length/define-own-prop-length-overflow-order.js
-    of/does-not-use-set-for-indices.js
     of/proto-from-ctor-realm.js
-    of/return-abrupt-from-data-property.js Object.preventExtensions doesn't seem to throw
     of/return-abrupt-from-data-property-using-proxy.js {unsupported: [Proxy]}
     prototype/concat/arg-length-exceeding-integer-limit.js {unsupported: [Proxy]}
     prototype/concat/Array.prototype.concat_large-typed-array.js new