diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/testBug593559.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/testBug593559.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,8 @@
+var gen = (function () {yield})();
+var t = gen.throw;
+try {
+    new t;
+} catch (e) {
+    actual = "" + e;
+}
+assertEq(actual, "TypeError: t is not a constructor");