diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/arrow-functions/construct-1.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/arrow-functions/construct-1.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,7 @@
+// Arrow functions are not constructors.
+
+load(libdir + "asserts.js");
+
+var f = a => { this.a = a; };
+assertThrowsInstanceOf(() => new f, TypeError);
+assertThrowsInstanceOf(() => new f(1, 2), TypeError);