diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/jaeger/bug640098.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/jaeger/bug640098.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,15 @@
+
+eval("(function(){({6953421313:0})})")();
+
+function f() {
+    var x = {6953421313: 123};
+    assertEq(x[6953421313], 123);
+
+    x[6953421313] = "a";
+    assertEq(x[6953421313], "a");
+
+    var y = {3.3: true};
+    assertEq(y[3.3], true);
+}
+f();
+