diff -r 325593146d19 -r 3c32d1ac1de9 src/Pure/Concurrent/event_timer.scala
--- a/src/Pure/Concurrent/event_timer.scala	Sun Dec 22 14:11:31 2024 +0100
+++ b/src/Pure/Concurrent/event_timer.scala	Sun Dec 22 14:13:21 2024 +0100
@@ -25,7 +25,7 @@
   }
 
   def request(time: Time, repeat: Option[Time] = None)(event: => Unit): Request = {
-    val task = new TimerTask { def run: Unit = event }
+    val task = new TimerTask { def run(): Unit = event }
     repeat match {
       case None => event_timer.schedule(task, new JDate(time.ms))
       case Some(rep) => event_timer.schedule(task, new JDate(time.ms), rep.ms)