diff -r 000000000000 -r 6474c204b198 js/src/tests/ecma_6/Comprehensions/nested-for-if.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/ecma_6/Comprehensions/nested-for-if.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,20 @@
+// For and if clauses can nest without limit in comprehensions.  This is
+// unlike JS 1.8 comprehensions, which can only have one trailing "if"
+// clause.
+
+function* range(start, end) {
+  for (var n = start; n < end; n++)
+    yield n;
+}
+
+function primesBetween6And25() {
+  return [for (n of range(6, 25)) if (n % 2) if (n % 3) if (n % 5) n];
+}
+assertDeepEq(primesBetween6And25(), [7,11,13,17,19,23]);
+
+function countUpToEvens(limit) {
+  return [for (n of range(0, limit)) if (!(n % 2)) for (m of range(0, n)) m]
+}
+assertDeepEq(countUpToEvens(7), [0,1,0,1,2,3,0,1,2,3,4,5]);
+
+reportCompare(null, null, "test");