diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/jaeger/recompile/patchdouble.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/jaeger/recompile/patchdouble.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,7 @@
+// only fix doubles for slots which the recompiled script thinks are doubles.
+function foo(x) {
+  var y = x & 0xffff;
+  y = (y * (x * 1000));
+  assertEq(y, 140735340806145000);
+}
+foo(0x7fffffff);