Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/tests/test-async-52.cs

@@ -0,0 +1,23 @@
+using System;
+using System.Threading.Tasks;
+
+public delegate T ActualValueDelegate<T> ();
+
+class X
+{
+	public static void Main ()
+	{
+		Matches (async () => await Throw());
+	}
+
+	static bool Matches<T>(ActualValueDelegate<T> del) where T : Task
+	{
+		del ().Wait ();
+		return true;
+	}
+
+	static async Task Throw()
+	{
+		await Task.Delay (1);
+	}
+}