From 8375e3a1ea9b0c13efb3188c844fe2a0c180c11e Mon Sep 17 00:00:00 2001
From: Guillaume Martres <smarter@ubuntu.com>
Date: Mon, 18 Jul 2016 09:13:32 +0100
Subject: [PATCH] Better test for #1181

Now that we implement partial higher-order unification (SI-2712 fix)
i1181.scala will compile even if `Alias[Int]` gets dealiased to
`(Int, Int)` because we can unify the latter with `M[_]` where
`M = [X] -> (Int, X)`.

The new test will only succeed if `Alias[Int, Int]` is not dealiased
because we will never unify `Foo[Int]` with `M[_,_]`.
---
 tests/pos/i1181b.scala | 11 +++++++++++
 1 file changed, 11 insertions(+)
 create mode 100644 tests/pos/i1181b.scala

diff --git a/tests/pos/i1181b.scala b/tests/pos/i1181b.scala
new file mode 100644
index 000000000000..7694aed0b770
--- /dev/null
+++ b/tests/pos/i1181b.scala
@@ -0,0 +1,11 @@
+class Foo[A]
+
+object Test {
+  def foo[M[_,_]](x: M[Int,Int]) = x
+
+  type Alias[X,Y] = Foo[X]
+  val x: Alias[Int,Int] = new Foo[Int]
+
+  foo[Alias](x) // ok
+  foo(x)
+}