src/Pure/System/session.scala
changeset 55316 885500f4aa6a
parent 55134 1b67b17cdad5
child 55431 e0f20a44ff9d
--- a/src/Pure/System/session.scala	Tue Feb 04 01:35:48 2014 +0100
+++ b/src/Pure/System/session.scala	Tue Feb 04 09:04:59 2014 +0000
@@ -139,7 +139,7 @@
   val syslog_messages = new Event_Bus[Isabelle_Process.Output]
   val raw_output_messages = new Event_Bus[Isabelle_Process.Output]
   val all_messages = new Event_Bus[Isabelle_Process.Message]  // potential bottle-neck
-
+  val trace_events = new Event_Bus[Simplifier_Trace.Event.type]
 
 
   /** buffered command changes (delay_first discipline) **/