Behaviour of Matcher#split doesn't match java.util.regex

[cushon]

In the following example, the behaviour of re2j doesn't match the behaviour of java.util.regex, is this expected?

import static java.util.Arrays.stream;
import static java.util.stream.Collectors.joining;

public class T {
  public static void main(String[] args) {
    String pattern = "\n(?: *\n)+";
    String input = "";
    int limit = 0;
    {
      System.err.println("> java.util.regex");
      var p = java.util.regex.Pattern.compile(pattern);
      print(p.split(input, limit));
    }
    {
      System.err.println("\n> re2j");
      var p = com.google.re2j.Pattern.compile(pattern);
      print(p.split(input, limit));
    }
  }

  private static void print(String[] split) {
    System.err.println(
        stream(split).map(x -> String.format("'%s'", x)).collect(joining(", ", "[", "]")));
  }
}

> java.util.regex
['']

> re2j
[]