Imported Upstream version 5.10.0.47

Former-commit-id: d0813289fa2d35e1f8ed77530acb4fb1df441bc0

mcs/errors/cs0136-6.cs

@@ -0,0 +1,16 @@
+// CS0136: A local variable named `s' cannot be declared in this scope because it would give a different meaning to `s', which is already used in a `parent or current' scope to denote something else
+// Line: 11
+
+using System;
+
+class X
+{
+	void Test2 (object o)
+	{
+		if (o is ValueType s) {
+			if (o is long s) {
+				Console.WriteLine (s);
+			}
+		}
+	}
+}