[691531] Variance conversion requires type parameters to be reference types

1 files changed, 17 insertions, 0 deletions

diff --git a/mcs/tests/gtest-variance-19.cs b/mcs/tests/gtest-variance-19.cs
new file mode 100644
index 00000000000..a261ea6fa23
--- /dev/null
+++ b/mcs/tests/gtest-variance-19.cs
@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+
+public class Test
+{
+	static void Bla<T, U> () where T : class, U
+	{
+		T[] ta = new T[0];
+		IEnumerable<T> ita = ta;
+		IEnumerable<U> itu = ita;
+	}
+
+	static void Main ()
+	{
+		Bla<string, object> ();
+	}
+}