diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/debug/Debugger-ctor-05.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/debug/Debugger-ctor-05.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,8 @@
+// Redundant non-global Debugger() arguments are ignored.
+
+var g = newGlobal();
+g.eval("var a = {}, b = {};");
+var dbg = Debugger(g.a, g.b);
+var arr = dbg.getDebuggees();
+assertEq(arr.length, 1);
+assertEq(arr[0], dbg.addDebuggee(g));