diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/collections/Array-of-3.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/collections/Array-of-3.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,8 @@
+// Array.of does not leave holes
+
+load(libdir + "asserts.js");
+
+assertDeepEq(Array.of(undefined), [undefined]);
+assertDeepEq(Array.of(undefined, undefined), [undefined, undefined]);
+assertDeepEq(Array.of.apply(this, [,,undefined]), [undefined, undefined, undefined]);
+assertDeepEq(Array.of.apply(this, Array(4)), [undefined, undefined, undefined, undefined]);