[BUG] Split Strings Broke Code

[BlackYuzia]

Info

I use webpack and webpack plugin for obfuscate.
Maybe this obfuscator broke webpack code... but I didn't sure on 100%...

Actualy, need more test. Maybe this trouble is not new and this is a duplicate...

Description

Today, I was write some code. I found what my code, after obfuscation, didn't work.
I would think what this is trouble in properties rename (how I found in readme)
I will try change settings, disable all, enable and and etc.

After all tests, I found something...

If I setup ONLY property renamer - all is work fine.
If I setup ONLY split strings - all is ... fine?
But, if I setup settings:

      renameGlobals: true,
      renameProperties: true,
      splitStrings: true,
      splitStringsChunkLength: 1, // Actualy, I test 1 and 3 values. This both call error. If this value 5 or greater all is good

I get error (check stack trace) and my code is BROKEN now.

Expected Behavior

Not broke code with too many symbols in splitStringsChunkLength

Current Behavior

If splitStringsChunkLength < 5 (tested only on 3 and 1 values) I get broken code after obfuscation.

PS: Actually I didn't know what code really broke after that... maybe webpack, maybe code what I was write...

Steps to Reproduce

I was setup settings in tosplitStrings: true,

1. Setup settings (look in description block)
2. Obfuscate code
3. Try start code
4. Maybe you get the same error like me

I think this trouble verry ... hard repeatfull.
I think without code (what I can't share currently) this trouble can be hard to repeat.

Stack trace

VM2399:formatted:287 Uncaught TypeError: _0x1368a0[("b" + "q" + "C" + "a" + "s")] is not a function
    at <anonymous>:1:10081
    at <anonymous>:1:12128
    at <anonymous>:1:46619

Minimal working example that will help to reproduce issue

I can't share with code from current project (maybe later ... if I would can do that)
Now, I can give only this line with error:

        if (_0x1368a0['b' + 'q' + 'C' + 'a' + 's'](_0x1368a0['P' + 'I' + 'n' + 'z' + 'c'], _0x1368a0['P' + 'I' + 'n' + 'z' + 'c'])) {

PS: Sorry if I give too low info about all. Call and ask me if you want more info.

[BlackYuzia]

Hmm. It is kinda my mistake or something like this ...
Now I didn't get this error kinda ... 👀

If I approve what this is bug in this lib I would reopen this.

[BlackYuzia]

Yep, I success fully test it now.
Some code has been really broken if I use splitStringsChunkLength: 1.
But, in currently moment, I didn't know what exactly code has been broken.

[sanex3339]

Please try to investigate it. I just re-checked that splitStrings option correctly works with emoji and everything looks ok.
So, maybe something in the code is using function.toString() for some reason (for example dependency injection in angular 1?

[sanex3339]

Here is the test with emoji support. Everything is ok.
340b728#diff-2558a7cf4a8f074d417da29f3491ef9cR166

[sanex3339]

What obfuscator version are you using?

[BlackYuzia]

What obfuscator version are you using?

    "webpack": "^4.44.1",
    "webpack-cli": "^3.3.12",
    "webpack-obfuscator": "^1.12.0"

[sanex3339]

Ok, you've used the latest version. Now I need a reproducible example because right now I haven't an idea about the reason for this error. Try to use conditional comments to isolate parts of your code: https://github.com/javascript-obfuscator/javascript-obfuscator#conditional-comments

[BlackYuzia]

Okey I will try to found broken code.
I answer later if I do that.

[BlackYuzia]

Success!

I found what has been broke!

Original code:

const obj = {a:0, b:1, c:2}; // Create object

console.log(obj.a)           // try get data

if length < 5,
console.log(obj.a) was return undefined.
if length >= 5
console.log(obj.a was return 0.

[BlackYuzia]

@sanex3339 this bug require renameProperties, but I think this is trouble by/in splitStringsChunkLength.
Because only if value of splitStringsChunkLength lower like 5, this bug is begun.

[sanex3339]

Cannot reproduce here:
https://obfuscator.io/