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transformObjectKeys: true causes TypeError: Cannot read property 'call' of undefined

See original GitHub issue

Raw Script: console.log('test');

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/***/ "./resources/js/loader.js":
/*!********************************!*\
  !*** ./resources/js/loader.js ***!
  \********************************/
/*! no static exports found */
/***/ (function(module, exports) {

console.log('test');

/***/ }),

/***/ 0:
/*!**************************************!*\
  !*** multi ./resources/js/loader.js ***!
  \**************************************/
/*! no static exports found */
/***/ (function(module, exports, __webpack_require__) {

module.exports = __webpack_require__(/*! /Users/zobov/Desktop/projects/test/resources/js/loader.js */"./resources/js/loader.js");


/***/ })

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In versions up to 0.20.4 error not appears.

Your Environment

Obfuscator version used: > 0.20.4
Node version used: 10.18.0

Stack trace

/Users/zobov/Desktop/projects/test/public/js/loader.js:1
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TypeError: Cannot read property 'call' of undefined
    at _0xddb5a0 (/Users/zobov/Desktop/projects/test/public/js/loader.js:1:872)
    at /Users/zobov/Desktop/projects/test/public/js/loader.js:1:2668
    at Object.<anonymous> (/Users/zobov/Desktop/projects/test/public/js/loader.js:1:2699)
    at Module._compile (internal/modules/cjs/loader.js:778:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
    at Module.load (internal/modules/cjs/loader.js:653:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
    at Function.Module._load (internal/modules/cjs/loader.js:585:3)
    at Function.Module.runMain (internal/modules/cjs/loader.js:831:12)
    at startup (internal/bootstrap/node.js:283:19)