diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/parallel/timeout.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/parallel/timeout.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,17 @@
+// |jit-test| exitstatus: 6;
+
+load(libdir + "parallelarray-helpers.js");
+
+function iterate(x) {
+  while (x == 2046) {
+    // for exactly one index, this infinitely loops!
+    // this ensures that the warmup doesn't loop.
+  }
+  return 22;
+}
+
+timeout(1);
+if (getBuildConfiguration().parallelJS)
+  Array.buildPar(2048, iterate);
+else
+  while (true);