diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/auto-regress/bug729571.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/auto-regress/bug729571.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,42 @@
+// Binary: cache/js-dbg-64-ca97bbcd6b90-linux
+// Flags: --ion-eager
+//
+
+gczeal(4);
+function TestCase(n, d, e, a) {}
+TestCase.prototype.dump = function () {};
+TestCase.prototype.testFailed = (function TestCase_testFailed() {
+	});
+  try  {
+    try    {    }    catch(ex1)    {    }
+  }  catch(ex)  {  }
+  options.initvalues  = {};
+  var optionNames = options().split(',');
+  var optionsframe = {};
+  try  {
+    optionsClear();
+  }  catch(ex)  {  }
+var lfcode = new Array();
+lfcode.push("\
+  try {  } catch (exception) {  }\
+    try {    } catch (exception) {    }\
+    try {    } catch (exception) {    }\
+    try {    } catch (actual) {    }\
+        var props = {};\
+  function test(which) {\
+    var g = newGlobal();\
+    function addDebugger(g, i) {\
+        var dbg = Debugger(g);\
+        dbg.onDebuggerStatement = function (frame) { };\
+    }\
+    for (var i = 0; i < 3; i++) {\
+        addDebugger(g, i);\
+    }\
+    g.eval(\"debugger;\");\
+}\
+for (var j = 0; j < 3; j++) test(j);\
+");
+while (true) {
+	var file = lfcode.shift(); if (file == undefined) { break; }
+	try { evaluate(file); } catch (lfVare) { }
+}