Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/tests/test-async-29.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Threading.Tasks;
+
+class C
+{
+	static async Task<int> Test()
+	{
+		await Task.Yield();
+		await Task.Yield();
+		await Task.Yield();
+		return 1;
+	} 
+	
+	public static int Main ()
+	{
+		Test ().Wait ();
+		return 0;
+	}
+}