diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/new-4.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/new-4.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,21 @@
+// Handle bailing from a constructor.
+
+var confuzzle = 0;
+
+function BailFromConstructor() {
+	this.x = "cats";
+	this.y = confuzzle + 5;
+	return 4;
+}
+
+function f() {
+	var x;
+	for (var i = 0; i < 100; i++) {
+		if (i == 99)
+			confuzzle = undefined;
+		x = new BailFromConstructor();
+		assertEq(typeof(x), "object");
+	}
+}
+
+f();