diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/testNewString.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/testNewString.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,21 @@
+function testNewString()
+{
+  var o = { toString: function() { return "string"; } };
+  var r = [];
+  for (var i = 0; i < 5; i++)
+    r.push(typeof new String(o));
+  for (var i = 0; i < 5; i++)
+    r.push(typeof new String(3));
+  for (var i = 0; i < 5; i++)
+    r.push(typeof new String(2.5));
+  for (var i = 0; i < 5; i++)
+    r.push(typeof new String("string"));
+  for (var i = 0; i < 5; i++)
+    r.push(typeof new String(null));
+  for (var i = 0; i < 5; i++)
+    r.push(typeof new String(true));
+  for (var i = 0; i < 5; i++)
+    r.push(typeof new String(undefined));
+  return r.length === 35 && r.every(function(v) { return v === "object"; });
+}
+assertEq(testNewString(), true);