diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/bug827821.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/bug827821.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,32 @@
+var lfcode = new Array();
+lfcode.push("3");
+lfcode.push("\
+	gczeal(2);\
+	for (let q = 0; q < 50; ++q) {\
+		var w = \"r\".match(/r/);\
+	}\
+	let (eval) (function  (a) {\
+		Function = gczeal;\
+	})();\
+	// .js\
+");
+lfcode.push(" // .js");
+lfcode.push(" // .js");
+lfcode.push(" // .js");
+while (true) {
+	var file = lfcode.shift(); if (file == undefined) { break; }
+        loadFile(file)
+}
+function loadFile(lfVarx) {
+    try {
+        if (lfVarx.substr(-3) == ".js") {
+	    uneval("foo");
+            switch (lfRunTypeId) {
+                case 3: function newFunc(x) { new Function(x)(); }; newFunc(lfVarx); break;
+                case 4: eval("(function() { " + lfVarx + " })();"); break;
+            }
+        } else if (!isNaN(lfVarx)) {
+            lfRunTypeId = parseInt(lfVarx);
+	}
+    } catch (lfVare) {}
+}