diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_8_5/extensions/sps-generators.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_8_5/extensions/sps-generators.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,36 @@
+// |reftest| skip-if(!xulRuntime.shell)
+
+// Any copyright is dedicated to the Public Domain.
+// http://creativecommons.org/licenses/publicdomain/
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 822041;
+var summary = "Live generators should not cache SPS state";
+
+print(BUGNUMBER + ": " + summary);
+
+function gen() {
+  var x = yield turnoff();
+  yield x;
+  yield 'bye';
+}
+
+function turnoff() {
+  print("Turning off profiler\n");
+  disableSPSProfiling();
+  return 'hi';
+}
+
+for (var slowAsserts of [ true, false ]) {
+  // The slowAssertions setting is not expected to matter
+  enableSPSProfilingAssertions(slowAsserts);
+
+  g = gen();
+  assertEq(g.next(), 'hi');
+  assertEq(g.send('gurgitating...'), 'gurgitating...');
+  for (var x in g)
+    assertEq(x, 'bye');
+}
+
+// This is really a crashtest
+reportCompare(0, 0, 'ok');