diff -r 762fcf8f9ced -r 972f7a4cdc0e src/Pure/Tools/server.scala
--- a/src/Pure/Tools/server.scala	Tue Jul 02 22:38:00 2024 +0200
+++ b/src/Pure/Tools/server.scala	Tue Jul 02 23:13:35 2024 +0200
@@ -46,7 +46,7 @@
 
     def parse(argument: String): Any =
       if (argument == "") ()
-      else if (YXML.detect_elem(argument)) YXML.parse_elem(argument)
+      else if (YXML.detect_elem(argument)) YXML.parse_elem(YXML.Source(argument))
       else JSON.parse(argument, strict = false)
 
     def unapply(argument: String): Option[Any] =