index.ts error in circular dependencies

[JulioJu]

This bug is with typescript 2.7.0-dev.20180116 or with typescript 2.6.2.

I thought is a node bug, so I've already report the bug at nodejs/node#18185. I've tried with Node.js 6.12.3 or 9.4.0. I've tried on Linux 4.14.13-1-ck x86_64.

1. Unzip the zip file below
   strangeErrorIndexDotTs.zip.

In app/index.ts you could see the code at line 4 and 5

export * from './simple.module';
export * from './myclass';

./myclass is only a declaration of class: (

export class MyClass {}

In sample.module.ts we have:

import { MyClass } from './';
export function SimpleFunction() {console.log(new MyClass());}; // works
export const SimpleModule = console.log(new MyClass()); // Doesn't work

And in server.ts we have:

import { MyClass, SimpleModule, SimpleFunction } from './';
console.log(SimpleFunction); // works
console.log(new MyClass()); // works
console.log(SimpleModule); // Doesnt work

2. npm install && node node_modules/typescript/bin/tsc
   We could see in appJS/index.js than at line 9 and 10 we have:

__export(require("./simple.module"));
__export(require("./myclass"));

3. node appJS/server.js
   You could see the error:

.................../strangeErrorIndexDotTs/appJS/simple.module.js:7
exports.SimpleModule = console.log(new _1.MyClass()); // Doesn't work
                                   ^

TypeError: _1.MyClass is not a constructor
    at Object.<anonymous> (................/strangeErrorIndexDotTs/appJS/simple.module.js:7:36)
    at Module._compile (module.js:660:30)
    at Object.Module._extensions..js (module.js:671:10)
    at Module.load (module.js:573:32)
    at tryModuleLoad (module.js:513:12)
    at Function.Module._load (module.js:505:3)
    at Module.require (module.js:604:17)
    at require (internal/module.js:11:18)
    at Object.<anonymous> (.................../strangeErrorIndexDotTs/appJS/index.js:9:10)
    at Module._compile (module.js:660:30)

4. In app/index.ts replace line 4 by line 5 and line 5 by line 4.
   You should have :

export * from './myclass';
export * from './simple.module';

5. rm -R appJS && node node_modules/typescript/bin/tsc :
   You could see in appJS/index.js than lines 9 and 10 are reversed:

__export(require("./myclass"));
__export(require("./simple.module"));

6. node appJS/server.js: it works.

In the original project (see 1.) we could see than:

• console.log(new MyClass()); in server.ts works (contrary to the same code in simple.module.ts).
  * In simple.module.ts: export function SimpleFunction() {console.log(new MyClass());}; works contrary to export const SimpleModule = console.log(new MyClass());

[mhegazy]

The compiler makes no grantees in the face of circular imports. seems like you are trying to import MyClass thought a cycle, and the result is undefined.

[JulioJu]

Ok I know. It's a mistake on my part. Sorry @mhegazy ! So I close this issue. It could be deleted !