diff -r 850ba6d47300 -r 319dd5c618a5 src/Pure/PIDE/markup.scala
--- a/src/Pure/PIDE/markup.scala	Tue Sep 29 12:12:34 2020 +0200
+++ b/src/Pure/PIDE/markup.scala	Tue Sep 29 13:19:34 2020 +0200
@@ -605,9 +605,10 @@
 
   object Invoke_Scala extends Function("invoke_scala")
   {
-    def unapply(props: Properties.T): Option[(String, String)] =
+    def unapply(props: Properties.T): Option[(String, String, Boolean)] =
       props match {
-        case List(PROPERTY, (NAME, name), (ID, id)) => Some((name, id))
+        case List(PROPERTY, (NAME, name), (ID, id), ("thread", Value.Boolean(thread))) =>
+          Some((name, id, thread))
         case _ => None
       }
   }