diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/parallel/closure-nested.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/parallel/closure-nested.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,48 @@
+load(libdir + "parallelarray-helpers.js");
+
+function testClosureCreationAndInvocation() {
+  var a = range(0, 64);
+  function makeaddv(v) {
+    var u = v - 1;
+    var t = v - 2;
+    var s = v - 3;
+    var r = v - 4;
+    var q = v - 5;
+    var p = v - 6;
+    var o = v - 7;
+    var n = v - 8;
+    var m = v - 9;
+    var l = v - 10;
+    var k = v - 11;
+    var j = v - 12;
+    var i = v - 13;
+    var h = v - 14;
+    var g = v - 15;
+    var f = v - 16;
+    var e = v - 17;
+    var d = v - 18;
+    var c = v - 19;
+    var b = v - 20;
+    var a = v - 21;
+    return function (x) {
+      switch (x) {
+      case 0: return a; case 1: return b;
+      case 2: return c; case 3: return d;
+      case 4: return e; case 5: return f;
+      case 6: return g; case 7: return h;
+      case 8: return i; case 9: return j;
+      case 10: return k; case 11: return l;
+      case 12: return m; case 13: return n;
+      case 14: return o; case 15: return p;
+      case 16: return q; case 17: return r;
+      case 18: return s; case 19: return t;
+      case 20: return u;
+      }
+    };
+  };
+  var m = a.mapPar(makeaddv);
+  assertEq(m[21](1), 1); // v == 21; x == 1 ==> inner function returns b == 1
+}
+
+if (getBuildConfiguration().parallelJS)
+  testClosureCreationAndInvocation();