diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/debug/gc-06.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/debug/gc-06.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,6 @@
+// Debugger objects do not keep debuggee globals live.
+var dbg = new Debugger;
+for (var i = 0; i < 10; i++)
+    dbg.addDebuggee(newGlobal());
+gc();
+assertEq(dbg.getDebuggees().length < 10, true);