import java.util.List;
import java.util.ArrayList;
import java.lang.Integer;
import java.lang.System;
import java.io.PrintStream;
import java.util.stream.Stream;
import java.util.function.Function;

public class Bug298 {
    public void m() {
        List<Integer> list = new ArrayList<>();
        list.stream().map(x -> 2 * x);
    }
}