Three incompatibilities with scalac.

tests/pending/hkt/compiler.error

@@ -0,0 +1,6 @@
+$ scalac tests/pending/hkt/*.scala
+$ ./bin/dotc tests/pending/hkt/*.scala
+tests/pending/hkt/hkt.scala:14: error: method empty in object Child does not take type parameters
+  Child.empty[Int]
+             ^
+one error found

tests/pending/hkt/hkt.scala

@@ -0,0 +1,15 @@
+import scala.language.higherKinds
+// Minimal reproduction for:
+// scala.collection.mutable.ArrayStack.empty[Int]
+
+abstract class Super[C[_]] {
+  def empty[T]: C[T] = ???
+}
+
+class Child[T]
+
+object Child extends Super[Child] {
+  def empty: Child[Nothing] = new Child()
+
+  Child.empty[Int]
+}

tests/pending/import-rewrite/compiler.error

@@ -0,0 +1,6 @@
+$ scalac tests/pending/import-rewrite/*.scala
+$ ./bin/dotc tests/pending/import-rewrite/*.scala
+tests/pending/import-rewrite/rewrite.scala:5: error: value apply is not a member of java.io.File.type
+  Seq("").map(File.apply)
+                   ^
+one error found

tests/pending/import-rewrite/file.scala

@@ -0,0 +1,10 @@
+package file
+
+class File private (val str: String) {
+  def name: String = "name"
+}
+
+object File {
+  def apply(str: String): File = new File(str)
+}
+

tests/pending/import-rewrite/rewrite.scala

@@ -0,0 +1,7 @@
+package file
+import java.io.{File => JFile, _}, StreamTokenizer.{TT_EOF => eof}
+
+object Main {
+  Seq("").map(File.apply)
+  // def name(file: File) = file.name
+}

tests/pending/naming-resolution/callsite.scala

@@ -0,0 +1,7 @@
+package naming.resolution
+
+import java.nio.file._ // Imports `Files`
+
+object Resolution {
+  def gimmeFiles: Files = Files.list(Paths.get("."))
+}

tests/pending/naming-resolution/compiler.error

@@ -0,0 +1,8 @@
+$ scalac tests/pending/naming-resolution/*.scala
+$ ./bin/dotc tests/pending/naming-resolution/*.scala
+tests/pending/naming-resolution/callsite.scala:6: error: type mismatch:
+ found   : java.util.stream.Stream[java.nio.file.Path]
+ required: java.nio.file.Files
+  def gimmeFiles: Files = Files.list(Paths.get("."))
+                                    ^
+one error found

tests/pending/naming-resolution/package.scala

@@ -0,0 +1,5 @@
+package naming
+
+package object resolution {
+  type Files = java.util.stream.Stream[java.nio.file.Path]
+}