diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/debug/Debugger-debuggees-19.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/debug/Debugger-debuggees-19.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,48 @@
+// removeAllDebuggees removes all the debuggees.
+
+var dbg = new Debugger;
+
+// If we eval in a debuggee, log which debuggee it was.
+var log;
+dbg.onEnterFrame = function (frame) {
+  log += 'e';
+  log += frame.environment.object.label;
+};
+
+var g1 = newGlobal();
+log = '';
+g1.eval('Math');
+assertEq(log, '');              // not yet a debuggee
+
+var g1w = dbg.addDebuggee(g1);
+assertEq(g1w instanceof Debugger.Object, true);
+g1w.label = 'g1';
+log = '';
+g1.eval('Math');                // now a debuggee
+assertEq(log, 'eg1');
+
+var g2 = newGlobal();
+log = '';
+g1.eval('Math');                // debuggee
+g2.eval('Math');                // not a debuggee
+assertEq(log, 'eg1');
+
+var g2w = dbg.addDebuggee(g2);
+assertEq(g2w instanceof Debugger.Object, true);
+g2w.label = 'g2';
+log = '';
+g1.eval('Math');                // debuggee
+g2.eval('this');                // debuggee
+assertEq(log, 'eg1eg2');
+
+var a1 = dbg.getDebuggees();
+assertEq(a1.length, 2);
+
+assertEq(dbg.removeAllDebuggees(), undefined);
+var a2 = dbg.getDebuggees();
+assertEq(a2.length, 0);
+
+log = '';
+g1.eval('Math');                // no longer a debuggee
+g2.eval('this');                // no longer a debuggee
+assertEq(log, '');