diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/jaeger/bug678782.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/jaeger/bug678782.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,9 @@
+var i = -1; var j = -1; var s = ''; var f = '';
+var buf = serialize(new Date(NaN));
+var a = [1/0, -1/0, 8.64e15 + 1, -(8.64e15 + 1)];
+for (var i = 0; i < a.length; i++) {
+    var n = a[i];
+    var nbuf = serialize(n);
+    for (var Number ; j < 8; j++)
+        buf[j + 8] = nbuf[j];
+}