From 9553571634a0fdc6e642565e5dcc52460344b9b6 Mon Sep 17 00:00:00 2001
From: Liu Fengyun <liu@fengy.me>
Date: Mon, 1 Jul 2019 08:16:09 +0200
Subject: [PATCH 1/2] Fix #6225: add test

---
 tests/neg/i6225.scala | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 tests/neg/i6225.scala

diff --git a/tests/neg/i6225.scala b/tests/neg/i6225.scala
new file mode 100644
index 000000000000..6602f8ec928f
--- /dev/null
+++ b/tests/neg/i6225.scala
@@ -0,0 +1,23 @@
+object O1 {
+  type A[X] = X
+  opaque type T = A
+}
+
+object O2 {
+  opaque type A[X] = X
+  object A {
+    opaque type T = A
+  }
+}
+
+object O3 {
+  opaque type R[X] = R[X]   // error
+}
+
+object O4{
+  opaque type T[X] = Any
+}
+
+object O5{
+  opaque type T[X] = Nothing
+}
\ No newline at end of file

From 059da735a6989d337087ea20cd3f4d1e0aa58150 Mon Sep 17 00:00:00 2001
From: Liu Fengyun <liu@fengy.me>
Date: Mon, 1 Jul 2019 08:20:32 +0200
Subject: [PATCH 2/2] Fix #6224: add test

---
 tests/pos/i6224.scala | 6 ++++++
 1 file changed, 6 insertions(+)
 create mode 100644 tests/pos/i6224.scala

diff --git a/tests/pos/i6224.scala b/tests/pos/i6224.scala
new file mode 100644
index 000000000000..e7b24dfaa2e3
--- /dev/null
+++ b/tests/pos/i6224.scala
@@ -0,0 +1,6 @@
+object O {
+  opaque type T = Int
+  object T {
+    opaque type T = Int
+  }
+}