import java.util.Arrays;
import org.checkerframework.dataflow.qual.Pure;

public class DaikonCrash {
    void method(Object[] a1) {
        int[] u = union(new int[] {}, new int[] {});
        Arrays.sort(u);
    }

    @Pure
    private int[] union(int[] ints, int[] ints1) {
        throw new RuntimeException();
    }
}