--- a/src/Pure/System/session.ML Fri May 17 13:46:18 2013 +0200
+++ b/src/Pure/System/session.ML Fri May 17 17:11:06 2013 +0200
@@ -60,6 +60,7 @@
Outer_Syntax.check_syntax ();
Options.reset_default ();
Future.shutdown ();
+ Event_Timer.shutdown ();
session_finished := true);