diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_8_1/jit/regress-458838.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_8_1/jit/regress-458838.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,65 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 458838;
+var summary = 'TM: do not fall off trace when nested function accesses var of outer function';
+var actual = '';
+var expect = '';
+
+//-----------------------------------------------------------------------------
+test();
+//-----------------------------------------------------------------------------
+
+function test()
+{
+  enterFunc ('test');
+  printBugNumber(BUGNUMBER);
+  printStatus (summary);
+
+  jit(true);
+
+  function f() {
+    var a = 1;
+    function g() {
+      var b = 0
+        for (var i = 0; i < 10; ++i) {
+          b += a;
+        }
+      return b;
+    }
+
+    return g();
+  }
+
+  expect = 10;
+  actual  = f();
+
+  var recorderStarted;
+  var recorderAborted;
+  var traceCompleted;
+  var skip = true;
+  
+  if (this.tracemonkey && !this.tracemonkey.adaptive)
+  {
+    recorderStarted = this.tracemonkey.recorderStarted;
+    recorderAborted = this.tracemonkey.recorderAborted;
+    traceCompleted  = this.tracemonkey.traceCompleted;
+    skip = false;
+  }
+
+  jit(false);
+
+  reportCompare(expect, actual, summary + ': return value 10');
+
+  if (!skip)
+  {
+    expect = 'recorderStarted=1, recorderAborted=0, traceCompleted=1';
+    actual = 'recorderStarted=' + recorderStarted + ', recorderAborted=' + recorderAborted + ', traceCompleted=' + traceCompleted;
+    reportCompare(expect, actual, summary + ': trace');
+  }
+
+  exitFunc ('test');
+}