"abc".split("") get error result ["","a","b","c"]

[xiaoxidashen]

Describe the bug

"abc".split("") get error array ["","a","b","c"]

To Reproduce

use j2clmavenplugin

//in java MathUtil.java
package cn.util;

import jsinterop.annotations.JsType;

@JsType
public class MathUtil {

    public static native void ppp(String s);

    public static void test() {
        String s = "abc";
        ppp(s);
        String[] split = s.split("");
        ppp("String.valueOf(split)"+"["+String.valueOf(split)+"]");
        ppp("split.length "+split.length+"");
        for (String s1 : split) {
            ppp("["+s1+"]");
        }
    }
}

//MathUtil.native.js
setTimeout(function() {

    MathUtil.ppp = function (s) {
        console.log(s);
    }

    MathUtil.test();

}, 0);

get result in browser console

abc
String.valueOf(split)[,a,b,c]
split.length 4
[]
[a]
[b]
[c]

"abc".split("") The expected result is ["a","b","c"]

[niloc132]

It looks like this is an upstream error, we're going to close this for now, unless we decide it is necessary to patch this in our j2cl fork. Before creating a PR at https://github.com/Vertispan/j2cl, please try to resolve this at google/j2cl.

google/j2cl#143