Tweak log printing of errors

Author: liufengyun

compiler/src/dotty/tools/dotc/transform/init/Errors.scala

@@ -55,6 +55,8 @@ object Errors {
       case unsafe: UnsafePromotion => unsafe.errors.flatMap(_.flatten)
       case _ => this :: Nil
     }
+
+    override def toString() = this.getClass.getName
   }
 
   /** Access non-initialized field */

compiler/src/dotty/tools/dotc/transform/init/Semantic.scala

@@ -1387,9 +1387,10 @@ object Semantic {
   extension (symbol: Symbol) def hasSource(using Context): Boolean =
     !symbol.defTree.isEmpty
 
-  def resolve(cls: ClassSymbol, sym: Symbol)(using Context): Symbol =
+  def resolve(cls: ClassSymbol, sym: Symbol)(using Context): Symbol = log("resove " + cls + ", " + sym, printer, _.asInstanceOf[Symbol].show) {
     if (sym.isEffectivelyFinal || sym.isConstructor) sym
     else sym.matchingMember(cls.appliedRef)
+  }
 
   def resolveSuper(cls: ClassSymbol, superType: Type, sym: Symbol)(using Context): Symbol = {
     import annotation.tailrec