Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/tests/gtest-558.cs

@@ -0,0 +1,24 @@
+using System;
+
+abstract class A<T>
+{
+	public abstract void Foo<U> (U arg) where U : T;
+}
+
+class B : A<int>
+{
+	public override void Foo<U> (U arg)
+	{
+		ValueType vt = arg;
+		Next (arg);
+	}
+	
+	void Next<UU> (UU a) where UU : struct
+	{
+	}
+
+	public static void Main ()
+	{
+		new B ().Foo (5);
+	}
+}