diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/bug847682.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/bug847682.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,18 @@
+function computeInputVariants(len) {
+  var orig = "";
+  var pointed = "";
+  for (var i = 0; i < len; i++) {
+    orig += (i%10)+"";
+    pointed += (i%10)+".";
+  }
+  return [orig, pointed];
+}
+
+function test() {
+  var re11 = /\./g;
+  for (var i=0; i < 40; i++) {
+    var a = computeInputVariants(i);
+    assertEq(a[0], a[1].replace(re11, ''))
+  }
+}
+test();