Flag ChildrenQueried in hasAnonymousChild

Author: OlivierBlanvillain

compiler/src/dotty/tools/dotc/transform/SymUtils.scala

@@ -145,8 +145,11 @@ class SymUtils(val self: Symbol) extends AnyVal {
     }.reverse
   }
 
-  def hasAnonymousChild(implicit ctx: Context): Boolean =
+  def hasAnonymousChild(implicit ctx: Context): Boolean = {
+    if (self.isType)
+      self.setFlag(ChildrenQueried)
     children.exists(_ `eq` self)
+  }
 
   /** Is symbol directly or indirectly owned by a term symbol? */
   @tailrec final def isLocal(implicit ctx: Context): Boolean = {