also cook the tree of a java raw type

[Cherry-picked e8e295a][modified]

Author: WojciechMazur

compiler/src/dotty/tools/dotc/typer/Typer.scala

@@ -4214,14 +4214,16 @@ class Typer(@constructorOnly nestingLevel: Int = 0) extends Namer
       val tree1 =
         if ((pt eq AnyTypeConstructorProto) || tp.typeParamSymbols.isEmpty) tree
         else {
-          val tp1 =
-            if (ctx.isJava)
-              // Cook raw type
-              AppliedType(tree.tpe, tp.typeParams.map(Function.const(TypeBounds.empty)))
-            else
-              // Eta-expand higher-kinded type
-              tree.tpe.EtaExpand(tp.typeParamSymbols)
-          tree.withType(tp1)
+          if (ctx.isJava)
+            // Cook raw type
+            val typeArgs = tp.typeParams.map(Function.const(TypeBounds.empty))
+            val tree1 = AppliedTypeTree(tree, typeArgs.map(TypeTree(_)))
+            val tp1 = AppliedType(tree.tpe, typeArgs)
+            tree1.withType(tp1)
+          else
+            // Eta-expand higher-kinded type
+            val tp1 = tree.tpe.EtaExpand(tp.typeParamSymbols)
+            tree.withType(tp1)
         }
       if (ctx.mode.is(Mode.Pattern) || ctx.mode.is(Mode.QuotedPattern) || tree1.tpe <:< pt) tree1
       else err.typeMismatch(tree1, pt)

sbt-test/pipelining/Yjava-tasty-paths/b/Test.scala

@@ -43,7 +43,7 @@ object B {
       val cd_ii_Raw: RawTypes#C[?]#D[?] = cd_ii
 
       RawTypes.mii_Raw_Raw(cd_ii_Raw)
-      // RawTypes.mii_Raw_Raw2(cd_ii_Raw) // error: dotty still doesnt rewrite the tree of a raw type to a type with wildcards
+      RawTypes.mii_Raw_Raw2(cd_ii_Raw)
     }
   }