Webcrack doesn't fully remove deadcode

[mobapedia]

This code obfuscated with obfuscator.io (high):

function hi() {
  console.log("Hello World!");
}
hi();

Returns this when deobfuscated:

function a() {
  console.log("Hello World!");
}
a();
(function () {
  function a() {
    var a;
    try {
      a = Function("return (function() {}.constructor(\"return this\")( ));")();
    } catch (b) {
      a = window;
    }
    return a;
  }
  var c = a();
  c.setInterval(b, 4000);
})();

[mobapedia]

Not sure if this is the same issue but it also fails to deobfuscate this: https://agma.io/js/ag251.js?v=240

[j4k0xb]

cant reproduce from the example but its random if it works or not. removing dead code is a known issue: #44

Not sure if this is the same issue but it also fails to deobfuscate this: agma.io/js/ag251.js?v=240

this one is obfuscated multiple times in a row and has dead code, possibly a custom/forked version

[mobapedia]

The dead code is not removed when mangle variables is on. Otherwise it deobfuscates it fine.

Obfuscated multiple times makes sense. Webcrack usually works on forked versions of obfuscator.io.

Also, why wouldn't it work on code thats obfuscated multiple times?

[j4k0xb]

Also, why wouldn't it work on code thats obfuscated multiple times?

it usually works, but if there dead code is left over it could mess up the next deobfuscations completely (e.g. string array isnt found)
compared to a single obfuscation where at least some things succeed

[mobapedia]

ah ok. it was probably a custom version then.