diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/jaeger/inline/bug647973.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/jaeger/inline/bug647973.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,11 @@
+function f(a1, a2, a3, a4) {
+}
+function g(a1, a2) {
+    var d = new Date(0);
+    f();
+    assertEq(typeof d, 'object');
+}
+g();
+gc();
+f(2, 2, 2, f(2, 2, 2, 12 === 12));
+g(false, false);