Fix #8368: Don't generate forwarders for excluded exports

Author: anatoliykmetyuk

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

@@ -1135,7 +1135,8 @@ class Namer { typer: Typer =>
             if sel.isWildcard then
               addWildcardForwarders(seen, sel.span)
             else
-              addForwardersNamed(sel.name, sel.rename, sel.span)
+              if sel.rename != nme.WILDCARD then
+                addForwardersNamed(sel.name, sel.rename, sel.span)
               addForwarders(sels1, sel.name :: seen)
           case _ =>
 

tests/neg/i8368.scala

@@ -0,0 +1,11 @@
+trait Foo {
+  def a = 1
+  def b = 1
+  def c = 1
+}
+
+class Bar(foo: Foo) {
+  export foo.{a => _, b => _, _}
+  val x1 = a // error
+  val x2 = b // error
+}

tests/pos/i8368.scala

@@ -0,0 +1,10 @@
+trait Foo {
+  def a = 1
+  def b = 1
+  def c = 1
+}
+
+class Bar(foo: Foo) {
+  export foo.{a => _, b => _, _}
+  val x1 = c
+}