More detail in error messages

Split error messages for recursive method and overloaded method needs type into two (but
did not solve the analysis which to show).
Make CyclicReference type error construct corresponding error message.

1 files changed, 2 insertions, 1 deletions

diff --git a/compiler/src/dotty/tools/dotc/core/Types.scala b/compiler/src/dotty/tools/dotc/core/Types.scala
index 200e94a1e..f49d65350 100644
--- a/compiler/src/dotty/tools/dotc/core/Types.scala
+++ b/compiler/src/dotty/tools/dotc/core/Types.scala
@@ -19,6 +19,7 @@ import util.Positions.{Position, NoPosition}
 import util.Stats._
 import util.{DotClass, SimpleMap}
 import reporting.diagnostic.Message
+import reporting.diagnostic.messages.CyclicReferenceInvolving
 import ast.tpd._
 import ast.TreeTypeMap
 import printing.Texts._
@@ -3856,7 +3857,7 @@ object Types {
 
   class CyclicReference private (val denot: SymDenotation)
     extends TypeError(s"cyclic reference involving $denot") {
-    def show(implicit ctx: Context) = s"cyclic reference involving ${denot.show}"
+    def toMessage(implicit ctx: Context) = CyclicReferenceInvolving(denot)
   }
 
   object CyclicReference {