[Fastify-Adapter] Injecting @Res() results in timeout of endpoint

Bug Report

Current behavior

When using Fastify-Adapter and then injecting fastify response via @Res() decorator in controller method results in timeout of that endpoint (even when sending a response via res.send(...))

Input Code

https://github.com/mschuttt/bug-nest-fastify-adapter

nest new bug-fastify remove @nestjs/platform-express from package.json npm i --save @nestjs/platform-fastify

change main.ts

import { NestFactory } from '@nestjs/core';
import { AppModule } from './app.module';
import { NestFastifyApplication, FastifyAdapter } from '@nestjs/platform-fastify';

async function bootstrap() {
  const app = await NestFactory.create<NestFastifyApplication>(AppModule, new FastifyAdapter());
  await app.listen(3000);
}
bootstrap();

change app.controller.ts

import { Controller, Get, Res } from '@nestjs/common';
import { AppService } from './app.service';

@Controller()
export class AppController {
  constructor(private readonly appService: AppService) {}

  @Get()
  getHello(@Res() res): void {
    res.send('hello')
  }
}

npm run start browser or postman: localhost:3000 <- endpoint times out… no response!

(refer to git repo above…)

Expected behavior

When sending a response (res.send(...)) - endpoint should send a response!

Environment

Nest version: 6.8.2

 
For Tooling issues:
- Node version: v10.15.3
- Platform:  Linux Ubuntu 16.04

[mschuttt]

Could you check out my provided sample repo, please? The example provided under sample (10-fastify) doesn’t` work for me neither when I add an endpoint with the @Res() decorator

My sample endpoint in cats controller

  @Get('testo')
  hello(@Res() res) {
    res.send('hallo')
  }

the only way I get it to work is to downgrade the @nestjs packages

@nestjs/common	@nestjs/core	@nestjs/platform-fastify	Response
6.8.2	6.8.2	6.8.2	No
6.7.2	6.7.2	6.7.2	Yes

This is only an issue with 6.8.2

[kamilmysliwiec]

Fixed in 6.8.3. Please, let me know if you face any issue.