From 693f26b622a2701292dceb01afb0d55af052fade Mon Sep 17 00:00:00 2001
From: Nicolas Stucki <nicolas.stucki@gmail.com>
Date: Thu, 13 Aug 2020 16:34:02 +0200
Subject: [PATCH] Fix #6226: Add regression test

---
 tests/neg/i6226.scala | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100644 tests/neg/i6226.scala

diff --git a/tests/neg/i6226.scala b/tests/neg/i6226.scala
new file mode 100644
index 000000000000..ed2dddc1b297
--- /dev/null
+++ b/tests/neg/i6226.scala
@@ -0,0 +1,12 @@
+object O1 {
+  opaque type X = Array[X] // error
+}
+
+object O2 {
+  opaque type X = X // error
+}
+
+object O3 { // error
+  opaque type R[X] = T[X]
+  opaque type T[X] = R[X] // error
+}