consumer.ts(4,11): error TS2454: Variable 'x' is used before being assigned.


==== express.d.ts (0 errors) ====
    declare namespace Express {
        export interface Request { }
        export interface Response { }
        export interface Application { }
    }
    
    declare module "express" {
        function e(): e.Express;
        namespace e {
            interface IRoute {
                all(...handler: RequestHandler[]): IRoute;
            }
    
            interface IRouterMatcher<T> {
                (name: string|RegExp, ...handlers: RequestHandler[]): T;
            }
    
            interface IRouter<T> extends RequestHandler {
                route(path: string): IRoute;
            }
    
            export function Router(options?: any): Router;
    
            export interface Router extends IRouter<Router> {}
    
            interface Errback { (err: Error): void; }
    
            interface Request extends Express.Request {
    
                get (name: string): string;
            }
    
            interface Response extends Express.Response {
                charset: string;
            }
    
            interface ErrorRequestHandler {
                (err: any, req: Request, res: Response, next: Function): any;
            }
    
            interface RequestHandler {
                (req: Request, res: Response, next: Function): any;
            }
    
            interface Handler extends RequestHandler {}
    
            interface RequestParamHandler {
                (req: Request, res: Response, next: Function, param: any): any;
            }
    
            interface Application extends IRouter<Application>, Express.Application {
                routes: any;
            }
    
            interface Express extends Application {
                createApplication(): Application;
            }
    
            var static: any;
        }
    
        export = e;
    }
    
==== augmentation.ts (0 errors) ====
    /// <reference path="express.d.ts"/>
    import * as e from "express";
    declare module "express" {
        interface Request {
            id: number;
        }
    }
    
==== consumer.ts (1 errors) ====
    import { Request } from "express";
    import "./augmentation";
    let x: Request;
    const y = x.id;
              ~
!!! error TS2454: Variable 'x' is used before being assigned.