Uncaught TypeError:Connot read property 'test' of undefined Chrome old versions <60

[typeoo]

Expected Behavior

Hi,
I noticed that my obfuscated code doesn't work on the old versions of Chrome.
I tested it on most of old versions. (versions: 32,42,43,44 .... 63);
Also I tried to check the other browsers (old versions); I got the same problem from Opera too.
Firefox had no problem.

it seems the problem is in this part:
var _0x581498 = function() {
var _0x50df5e = _0x581498[_0xa8ea('0x53e', '7]tY')](_0x2b610f[_0xa8ea('0x1b07', '%Rif')])()_0xa8ea('0x12c8', 'KvLJ')]);
return !_0x50df5e'test';
};
I'm trying to figure it out ,and also waiting your help.
thanks for making this amazing tool.

[sanex3339]

Hi. Can you show me original source code of this part?

var _0x581498 = function() {
var _0x50df5e = _0x581498[_0xa8ea('0x53e', '7]tY')](_0x2b610f[_0xa8ea('0x1b07', '%Rif')])()_0xa8ea('0x12c8', 'KvLJ')]);
return !_0x50df5e'test';
};

[sanex3339]

Hmm.
Show me your obfuscator version, your options and example how I can reproduce this bug.

This is invalid code. How did you obfuscate your code?

[JerryChan31]

I bumped into this error, too.
In my case, I found this situation happens when you turned on selfDefending and stringArray at the same time.
This is my options and I use webpack-obfuscator to obfuscate my code.

const obfConfig = {
  compact: true,
  controlFlowFlattening: false,
  deadCodeInjection: false,
  debugProtection: false,
  debugProtectionInterval: false,
  disableConsoleOutput: true,
  identifierNamesGenerator: 'hexadecimal',
  log: false,
  renameGlobals: false,
  rotateStringArray: true,
  selfDefending: true,
  shuffleStringArray: true,
  splitStrings: true,
  stringArray: true,
  stringArrayEncoding: false,
  stringArrayThreshold: 1,
  unicodeEscapeSequence: false
}

[sanex3339]

Probably something other breaks your code, because here

var _0x581498 = function() {
    var _0x50df5e = _0x581498[_0xa8ea('0x53e', '7]tY')](_0x2b610f[_0xa8ea('0x1b07', '%Rif')])()_0xa8ea('0x12c8', 'KvLJ')]);
    return !_0x50df5e'test';
};

this line is invalid JS code.:

!_0x50df5e'test';

[sanex3339]

@JerryChan31 can you try to reproduce it here?
https://obfuscator.io/

[JerryChan31]

var a0_0x39cc89 = a0_0x2ff663(this, function() {
    var _0x3bc218 = function() {
        var _0x1ea51c = _0x3bc218['constructor']('return\x20/\x22\x20+\x20this\x20+\x20\x22/')()['compile']('^([^\x20]+(\x20+[^\x20]+)+)+[^\x20]}');
        return !_0x1ea51c['test'](a0_0x39cc89);
    };
    return _0x3bc218();
});

This is where my code throws error.It looks like regular expression I guess ?
I can try to reproduce it later.

[typeoo]

hi Timofey
by turning off compact code I got it resolved.
I think the problem is here: regular expression

uncompacted code:

 if (!_0x51839a[_0x4add('0x9f4')]($, _0x4add('0x10a2'))[_0x4add('0x122d')]) {
        if (_0x51839a[_0x4add('0x25a')](_0x51839a[_0x4add('0xf3a')], _0x51839a[_0x4add('0xf3a')])) {
            return ![];
        } else {
            var _0x14e114 = /^[A-Za-z]*$/;
            if (_0x14e114['test'](result)) {
                return !![];
            } else {
                return ![];


            }
        }
    }

I think regular expressions can throw an error on old versions when we compact the code:

var english = /^[A-Za-z]*$/;
if (english.test(String.fromCharCode(result))){english_chr=true;}else{english_chr=false;}

• note I just had this problem on old versions.

[TerranTian]

Bumped into this problem too.

Here is the original code ：

function loadLib(src, callback) {
        var s = document.createElement('script');
        s.async = false;
        s.src = src;
        s.addEventListener('load', function () {
            s.parentNode.removeChild(s);
            s.removeEventListener('load', arguments.callee, false);
            callback && callback();
        }, false);
        document.head.appendChild(s);
    };

Here are the options:

{
    "compact": true,
    "controlFlowFlattening": false,
    "deadCodeInjection": false,
    "debugProtection": false,
    "debugProtectionInterval": false,
    "disableConsoleOutput": false,
    "identifierNamesGenerator": "mangled",
    "log": false,
    "renameGlobals": false,
    "rotateStringArray": true,
    "selfDefending": true,
    "stringArray": true,
    "stringArrayEncoding": true,
    "stringArrayThreshold": 0.75,
    "unicodeEscapeSequence": false,

    "transformObjectKeys":false
}

[sanex3339]

Just have applied for a free opensource BrowserStack plan, so can test it.

[sanex3339]

I have found the problem, the PR is ready.

[sanex3339]

Fixed in 1.2.1