[BUG] Lose Arguments

Description

Hi there. I didn’t write on e-mail this time, because that just a bug report (ONE MORE KRUZYA 😄) So, I try obfuscate some code. I use plural-ru, but I think this isn’t trouble of plural-ru package.

So, in short description. If I right, obfuscator with next config:

{
    "controlFlowFlattening": true,
    "controlFlowFlatteningThreshold": 1.0,
}

Just lose a few arguments by spread operator. For more check examples.

Steps to reproduce

1. Create function with spread operator (...some_array).
2. Obfuscate with my settings.
3. Profit.

Examples

Oh shit, here we go again…

Original:

// index.js | Я упростил код до 2 + 2. 
const plural = require("plural-ru");
const translate = ["Kruzya", "Is", "P..."];
plural(online, ...translate); // in this line I found bug, but go next...

Obfuscated:

_0x102640['HrGnp'](plural, online, ...translate); 

Function:

How you can see, function can send only 3 arguments.

• first: plural,
• second: online,
• third: array.

But in third argument we have a bug … because ...translate => arg1,arg2,arg3, …, argn (n = length of array). So, here we get 5 arguments, but sended only 3.

Result of this exec:

This is a potential bug of obfuscator 👀

[sanex3339]

Released as 2.10.5

[zeeker999]

Found the minimal code to reproduce the issue:

function f(a, b, c, d) {
  console.log(a, b, c, d)
}

function g(...args) {
  f(...args, 5)
}
const a = [1, 2, 3]
g(...a, 4)

The output:

function f(e, h, i, j) {
    console['log'](e, h, i, j);
}
function g(...b) {
    const c = {
        'vtpEA': function (d, ...e, h) {
            return d(...e, h);
        }
    };
    c['vtpEA'](f, ...b, 0x5);
}
const a = [
    0x1,
    0x2,
    0x3
];
g(...a, 0x4);