Don't use 3.4.0-RC1 as default, allow to compiler plugin/scalalib tests

project/ScalaVersions.scala

@@ -21,11 +21,11 @@ object ScalaVersions {
   val crossScala212 = (14 to 18).map(v => s"2.12.$v")
   val crossScala213 = (8 to 12).map(v => s"2.13.$v")
   val crossScala3 = List(
+    Seq("3.4.0-RC1"), // Bug in compiler leads to errors in tests, don't use it as default until RC2
     // windowslib fails to compile with 3.1.{0-1}
     (2 to 3).map(v => s"3.1.$v"),
     (0 to 2).map(v => s"3.2.$v"),
-    (0 to 1).map(v => s"3.3.$v"),
-    Seq("3.4.0-RC1")
+    (0 to 1).map(v => s"3.3.$v")
   ).flatten
 
   // Scala versions used for publishing libraries