Angular: 7.2.1 ES6 class ReferenceError : Cannot access 'X' before initialization

I'm having the following TypeScript class

export class Vehicule extends TrackableEntity {
vehiculeId: number;
constructor() {
super();
return super.proxify(this);
}
}


my typescript target in tsconfig.json is configured as es6:

"compilerOptions": {
"module": "es2015",
"moduleResolution": "node",
"emitDecoratorMetadata": true,
"experimentalDecorators": true,
"target": "es6",
}


At runtime, here in Chrome, the code is failing with:

ReferenceError: Cannot access 'Vehicule' before initialization
at Module.Vehicule (https://localhost:44338/src-app-components-dispositifsDATI-dispositifsDATI-module.js:10559:100)
at Module../src/app/domain/models/VehiculeGpsBoxInfo.ts (https://localhost:44338/src-app-components-dispositifsDATI-dispositifsDATI-module.js:11156:69)
at __webpack_require__ (https://localhost:44338/runtime.js:84:30)
at Module../src/app/domain/models/Vehicule.ts (https://localhost:44338/src-app-components-dispositifsDATI-dispositifsDATI-module.js:10571:78)
at __webpack_require__ (https://localhost:44338/runtime.js:84:30)
at Module../src/app/components/dispositifsDATI/mainDATI/listDATI/listDATI.component.ts (https://localhost:44338/src-app-components-dispositifsDATI-dispositifsDATI-module.js:6447:82)
at __webpack_require__ (https://localhost:44338/runtime.js:84:30)
at Module../src/app/components/dispositifsDATI/index.ts (https://localhost:44338/src-app-components-dispositifsDATI-dispositifsDATI-module.js:3053:95)
at __webpack_require__ (https://localhost:44338/runtime.js:84:30)
at Module../src/app/components/dispositifsDATI/dispositifsDATI.routes.ts (https://localhost:44338/src-app-components-dispositifsDATI-dispositifsDATI-module.js:2982:64)


I needed to change es5 to es6 to solve this other problem.


EDIT: The VehiculeGpsBoxInfo.ts file is importing Vehicule like this:

import { Vehicule } from "./Vehicule";


EDIT 2: I vould say that this may be webpack related, the way that modules are exported/imported in the genrated modules.

EDIT 3: After further research, this seems to have nothing to do with the code shown above. Started a new question about webpack and ES6.

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