Imported Upstream version 5.10.0.47

Former-commit-id: d0813289fa2d35e1f8ed77530acb4fb1df441bc0

mcs/tests/test-pattern-11.cs

@@ -0,0 +1,15 @@
+using System;
+
+class X
+{
+	public static int Main ()
+	{
+		object o = null;
+		for (o = "abcd"; o is String s; o = null) {
+			Console.WriteLine (s);
+		}
+
+		
+		return 0;
+	}
+}