Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/errors/cs4008.cs

@@ -0,0 +1,17 @@
+// CS4008: Cannot await void method `X.Foo()'. Consider changing method return type to `Task'
+// Line: 10
+
+using System.Threading.Tasks;
+
+class X
+{
+	static async void Test ()
+	{
+		await Foo ();
+	}
+	
+	static async void Foo ()
+	{
+		await Task.FromResult (1);
+	}
+}