diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/gc/bug-948423.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/gc/bug-948423.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,23 @@
+if (!this.hasOwnProperty("TypedObject"))
+  quit();
+
+var ArrayType = TypedObject.ArrayType;
+var StructType = TypedObject.StructType;
+var uint8 = TypedObject.uint8;
+var uint32 = TypedObject.uint32;
+var ObjectType = TypedObject.Object;
+function runTests() {
+  (function DimensionLinkedToUndimension() {
+    var UintsA = uint32.array();
+    var FiveUintsA = UintsA.dimension(5);
+    var FiveUintsB = uint32.array(5);
+    assertEq(true, 
+	FiveUintsA.equivalent(FiveUintsB)
+	);
+  })();
+  (function PrototypeHierarchy() {
+    schedulegc(3);
+    var Uint8s = uint8.array();
+  })();
+}
+runTests();