1.1 --- a/src/Pure/System/session.scala	Thu Jun 23 14:48:32 2011 +0200
     1.2 +++ b/src/Pure/System/session.scala	Thu Jun 23 14:52:32 2011 +0200
     1.3 @@ -7,6 +7,7 @@
     1.4  
     1.5  package isabelle
     1.6  
     1.7 +import java.lang.System
     1.8  
     1.9  import scala.actors.TIMEOUT
    1.10  import scala.actors.Actor