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 /*

  * @test /nodynamiccopyright/

  * @bug 7126754

  * @summary Generics compilation failure casting List<? extends Set...> to List<Set...>

  * @compile T7126754.java

  */

 import java.util.List;

 import java.util.Set;

 public class T7126754 {

   public static void main(String[] args) {

     List<Set<? extends String>> a = null;

     List<? extends Set<? extends String>> b = a;

     List<? extends Set<? extends String>> c = null;

     List<Set<? extends String>> d = (List<Set<? extends String>>)c;

   }

 }