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-rw-r--r--test/files/run/t7899-regression.scala24
1 files changed, 0 insertions, 24 deletions
diff --git a/test/files/run/t7899-regression.scala b/test/files/run/t7899-regression.scala
deleted file mode 100644
index 67d38cdd1d..0000000000
--- a/test/files/run/t7899-regression.scala
+++ /dev/null
@@ -1,24 +0,0 @@
-import language.higherKinds
-
-object Test {
- trait Monad[M[_]] {
- def foo[A](ma: M[A])(f: M[A] => Any) = f(ma)
- }
- implicit def function1Covariant[T]: Monad[({type l[a] = (T => a)})#l] =
- new Monad[({type l[a] = (T => a)})#l] {}
-
- def main(args: Array[String]) {
- // inference of T = (=> Any) here was outlawed by SI-7899 / 8ed7099
- // but this pattern is used in Scalaz in just a few places and caused
- // a regression.
- //
- // Inference of a by-name type doesn't *always* lead to a ClassCastException,
- // it only gets there if a method in generic code accepts a parameter of
- // that type.
- //
- // We need to introduce the stricter inference rules gradually, probably
- // with a warning.
- val m = implicitly[Monad[({type f[+x] = (=> Any) => x})#f]]
- assert(m.foo[Int]((x => 0))(f => f(???)) == 0)
- }
-}