Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

mcs/errors/cs8093-2.cs

@@ -0,0 +1,23 @@
+// CS8093: An argument to nameof operator cannot be extension method group
+// Line: 21
+
+public class A
+{
+}
+
+static class X
+{
+	public static string Extension (this int a)
+	{
+		return null;
+	}
+}
+
+public static class Test
+{
+	public static void Main ()
+	{
+		A a = null;
+		var x = nameof (a.Extension);
+	}
+}