diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/parallel/Array-reducePar-nested-sum-each-row.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/parallel/Array-reducePar-nested-sum-each-row.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,23 @@
+load(libdir + "parallelarray-helpers.js");
+
+function test() {
+  var array1 = range(0, 512);
+  var array2 = Array.build(512, function(i) {
+    return i*1000000 + array1.reduce(sum);
+  });
+
+  assertParallelExecSucceeds(
+    function (m) {
+      return  Array.buildPar(512, function(i) {
+        return i*1000000 + array1.reducePar(sum);
+      });
+    },
+    function (r) {
+      assertStructuralEq(array2, r);
+    });
+
+  function sum(a, b) { return a+b; }
+}
+
+if (getBuildConfiguration().parallelJS)
+  test();