Drop restriction to 2nd order hk types

Allow hk type parameters to be higher kinded themselves.

1 files changed, 25 insertions, 0 deletions

diff --git a/tests/pos/t2066.scala b/tests/pos/t2066.scala
new file mode 100644
index 000000000..d175769fa
--- /dev/null
+++ b/tests/pos/t2066.scala
@@ -0,0 +1,25 @@
+trait A1 {
+  def f[T[+_]] = ()
+}
+
+trait B1 extends A1 {
+  override def f[T[+_]] = ()
+}
+
+
+trait A2 {
+  def f[T[-_]] = ()
+}
+
+trait B2 extends A2 {
+  override def f[T[-_]] = ()
+}
+
+
+trait A3 {
+  def f[T[X[+_]]] = ()
+}
+
+trait B3 extends A3 {
+  override def f[T[X[+_]]] = ()
+}