diff -r 000000000000 -r 6474c204b198 js/src/tests/ecma_5/Number/toString-radix-handling.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/ecma_5/Number/toString-radix-handling.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,37 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommonn.org/licenses/publicdomain/
+ */
+
+var BUGNUMBER = 647385;
+var summary =
+  "Number.prototype.toString should use ToInteger on the radix and should " +
+  "throw a RangeError if the radix is bad";
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+function test(r)
+{
+  try
+  {
+    5..toString(r);
+    throw "should have thrown";
+  }
+  catch (e)
+  {
+    assertEq(e instanceof RangeError, true, "expected a RangeError, got " + e);
+  }
+}
+test(Math.pow(2, 32) + 10);
+test(55);
+
+/******************************************************************************/
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("All tests passed!");