diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/testApplyAtJoinPoint.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/testApplyAtJoinPoint.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,12 @@
+var isTrue = true;
+
+function g(x) {
+    return x;
+}
+
+function f() {
+    return g.apply(null, isTrue ? ["happy"] : arguments);
+}
+
+for (var i = 0; i < 18; ++i)
+    assertEq(f("sad"), "happy");