1.1 --- a/src/Pure/Isar/toplevel.ML	Sun Jan 04 00:00:03 2009 +0100
     1.2 +++ b/src/Pure/Isar/toplevel.ML	Sun Jan 04 00:01:16 2009 +0100
     1.3 @@ -718,7 +718,7 @@
     1.4  
     1.5          val future_proof = Proof.future_proof
     1.6            (fn prf =>
     1.7 -            Future.fork_pri 1 (fn () =>
     1.8 +            Future.fork_pri ~1 (fn () =>
     1.9                let val (states, State (result_node, _)) =
    1.10                  (case st' of State (SOME (Proof (_, (_, orig_gthy)), exit), prev)
    1.11                    => State (SOME (Proof (ProofNode.init prf, (finish, orig_gthy)), exit), prev))