diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/new-5.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/new-5.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,15 @@
+// Call an Ion constructor from the interpreter.
+
+// This gets compiled and called by the interpreter.
+// Allocation and primitive check need to happen caller-side.
+function Foo() {
+	this.x = 5;
+	return 4;
+}
+
+eval("//nothing"); // Prevent compilation of global script.
+
+for (var i = 0; i < 100; i++) {
+	var x = new Foo();
+	assertEq(typeof(x), "object");
+}