diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/arguments/defaults-evaluation-order.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/arguments/defaults-evaluation-order.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,27 @@
+function f1(a, bIs, cIs, dIs, b=a, c=d, d=5) {
+    assertEq(a, 1);
+    assertEq(b, bIs);
+    assertEq(c, cIs);
+    assertEq(d, dIs);
+}
+f1(1, 1, undefined, 5);
+f1(1, 42, undefined, 5, 42);
+f1(1, 42, 43, 5, 42, 43);
+f1(1, 42, 43, 44, 42, 43, 44);
+function f2(a=[]) { return a; }
+assertEq(f2() !== f2(), true);
+function f3(a=function () {}) { return a; }
+assertEq(f3() !== f3(), true);
+function f4(a=Date) { return a; }
+assertEq(f4(), Date);
+Date = 0;
+assertEq(f4(), 0);
+function f5(x=FAIL()) {};  // don't throw
+var n = 0;
+function f6(a=n++) {}
+assertEq(n, 0);
+function f7([a, b], A=a, B=b) {
+    assertEq(A, a);
+    assertEq(B, b);
+}
+f7([0, 1]);