src/Pure/Isar/runtime.ML
changeset 57831 885888a880fb
parent 57666 1c0ee733325f
child 57975 c657c68a60ab
--- a/src/Pure/Isar/runtime.ML	Wed Jul 30 09:40:28 2014 +0200
+++ b/src/Pure/Isar/runtime.ML	Thu Jul 31 20:09:30 2014 +0200
@@ -99,6 +99,7 @@
               TERMINATE => "Exit"
             | TimeLimit.TimeOut => "Timeout"
             | TOPLEVEL_ERROR => "Error"
+            | ERROR "" => "Error"
             | ERROR msg => msg
             | Fail msg => raised exn "Fail" [msg]
             | THEORY (msg, thys) =>