diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/debug/Debugger-debuggees-20.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/debug/Debugger-debuggees-20.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,28 @@
+// addAllGlobalsAsDebuggees adds all the globals as debuggees.
+
+var g1 = newGlobal();           // Created before the Debugger; debuggee.
+var g2 = newGlobal();           // Created before the Debugger; not debuggee.
+
+var dbg = new Debugger;
+
+var g3 = newGlobal();           // Created after the Debugger; debuggee.
+var g4 = newGlobal();           // Created after the Debugger; not debuggee.
+
+var g1w = dbg.addDebuggee(g1);
+assertEq(dbg.addAllGlobalsAsDebuggees(), undefined);
+
+// Get Debugger.Objects viewing the globals from their own compartments;
+// this is the sort that findAllGlobals and addDebuggee return.
+var g1w = g1w.makeDebuggeeValue(g1).unwrap();
+var g2w = g1w.makeDebuggeeValue(g2).unwrap();
+var g3w = g1w.makeDebuggeeValue(g3).unwrap();
+var g4w = g1w.makeDebuggeeValue(g4).unwrap();
+var thisw = g1w.makeDebuggeeValue(this).unwrap();
+
+// Check that they're all there.
+assertEq(dbg.hasDebuggee(g1w), true);
+assertEq(dbg.hasDebuggee(g2w), true);
+assertEq(dbg.hasDebuggee(g3w), true);
+assertEq(dbg.hasDebuggee(g4w), true);
+// The debugger's global is not a debuggee.
+assertEq(dbg.hasDebuggee(thisw), false);