Bug 1317306: Length property of %TypedArray% is zero in ES2016. r=evilpie

js/src/tests/ecma_7/TypedArray/length.js

@@ -0,0 +1,14 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+const TypedArray = Object.getPrototypeOf(Int32Array);
+
+assertEq(TypedArray.length, 0);
+
+assertDeepEq(Object.getOwnPropertyDescriptor(TypedArray, "length"), {
+    value: 0, writable: false, enumerable: false, configurable: true,
+});
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);

js/src/vm/TypedArrayObject.cpp

@@ -1514,7 +1514,7 @@ TypedArrayObject::staticProperties[] = {
 
 static const ClassSpec
 TypedArrayObjectSharedTypedArrayPrototypeClassSpec = {
-    GenericCreateConstructor<TypedArrayConstructor, 3, gc::AllocKind::FUNCTION>,
+    GenericCreateConstructor<TypedArrayConstructor, 0, gc::AllocKind::FUNCTION>,
     GenericCreatePrototype,
     TypedArrayObject::staticFunctions,
     TypedArrayObject::staticProperties,