diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/debug/Debugger-debuggees-06.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/debug/Debugger-debuggees-06.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,26 @@
+// {has,add,remove}Debuggee throw a TypeError if the argument is invalid.
+
+load(libdir + "asserts.js");
+
+var dbg = new Debugger;
+
+function check(val) {
+    assertThrowsInstanceOf(function () { dbg.hasDebuggee(val); }, TypeError);
+    assertThrowsInstanceOf(function () { dbg.addDebuggee(val); }, TypeError);
+    assertThrowsInstanceOf(function () { dbg.removeDebuggee(val); }, TypeError);
+}
+
+// Primitive values are invalid.
+check(undefined);
+check(null);
+check(false);
+check(1);
+check(NaN);
+check("ok");
+
+// A Debugger.Object that belongs to a different Debugger object is invalid.
+var g = newGlobal();
+var dbg2 = new Debugger;
+var w = dbg2.addDebuggee(g);
+assertEq(w instanceof Debugger.Object, true);
+check(w);