upgrade scala from 3.4.2 to 3.5.2 highlights a @tailrec problem

See build error:

TailRec optimisation not applicable, method attackLoop contains no recursive calls

build.sbt

@@ -1,5 +1,5 @@
 lazy val compression = Project("compression", file("."))
-scalaVersion := "3.4.2"
+scalaVersion := "3.5.2"
 name         := "compression"
 organization := "org.lichess"
 version      := "2.0"