src/Pure/PIDE/command.ML

--- a/src/Pure/PIDE/command.ML	Sat Apr 02 23:14:08 2016 +0200
+++ b/src/Pure/PIDE/command.ML	Sat Apr 02 23:29:05 2016 +0200
@@ -417,7 +417,7 @@
     in
       (case delay of
         NONE => fork ()
-      | SOME d => ignore (Event_Timer.request (Time.+ (Time.now (), d)) fork))
+      | SOME d => ignore (Event_Timer.request (Time.now () + d) fork))
     end
   else run_process execution_id exec_id print_process;