Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/errors/cs1989.cs

@@ -0,0 +1,19 @@
+// CS1989: Async lambda expressions cannot be converted to expression trees
+// Line: 17
+
+using System;
+using System.Linq.Expressions;
+using System.Threading.Tasks;
+
+class C
+{
+	static Task Method ()
+	{
+		return null;
+	}
+	
+	public static void Main ()
+	{
+		Expression<Action<int>> a = async l => await Method ();
+	}
+}