Use module terminal exceptions. (UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'length' of undefined)

Version

@nuxt/content:1.10.0 nuxt:2.14.6

Steps to reproduce

Configure the ‘@nuxt/content’ module to refresh the page and the terminal reports an error.

Mine is a brand new project.

(node:31206) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'length' of undefined
    at WebSocket.setSocket (/Users/projects/node_modules/ws/lib/websocket.js:162:14)
    at WebSocketServer.completeUpgrade (/Users/projects/node_modules/ws/lib/websocket-server.js:322:8)
    at WebSocketServer.handleUpgrade (/Users/projects/node_modules/ws/lib/websocket-server.js:245:10)
    at WS.handleUpgrade (/Users/projects/node_modules/@nuxt/content/lib/ws.js:21:21)
    at WS.serve (/Users/projects/node_modules/@nuxt/content/lib/ws.js:17:10)
    at /Users/projects/node_modules/@nuxt/content/lib/middleware.js:12:15
    at call (/Users/projects/node_modules/connect/index.js:239:7)
    at next (/Users/projects/node_modules/connect/index.js:183:5)
    at next (/Users/projects/node_modules/connect/index.js:161:14)
    at WebpackBundler.middleware (/Users/projects/node_modules/@nuxt/webpack/dist/webpack.js:5562:5)
(node:31206) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:31206) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

Remove the plug-in in the ‘nuxt.config.js’ file, the project is normal.

modules: [
    // https://go.nuxtjs.dev/content  
    // '@nuxt/content',  
],

Server configuration

const Koa = require("koa");
const { Nuxt, Builder } = require("nuxt");

const app = new Koa();
// Import and Set Nuxt
const config = require("../nuxt.config.js");
config.dev = !(app.env === "production");
const env = config.dev ? "dev" : "prod";
const host = "localhost";
const port = "4000";

async function start() {
  // Instantiate nuxt.js
  const nuxt = new Nuxt(config);

  // Build in development
  if (env === "dev") {
    await new Builder(nuxt).build();
  }

  app.use(async ctx => {
    ctx.status = 200;
    ctx.respond = false; // Mark request as handled for Koa
    ctx.req.ctx = ctx; // This might be useful later on, e.g. in nuxtServerInit or with nuxt-stash
    await nuxt.render(ctx.req, ctx.res);
  });

  app.listen(port, host);
  console.log(`Server listening on http://${host}:${port}`);
}

start();

[pangxieju]

Temporarily handle, block’UnhandledPromiseRejectionWarning’ .🤣

 // ./server/index.js
 if (env === "dev") {
    await new Builder(nuxt).build();
    process.on('unhandledRejection', (error) => {});
 }

[kgrosvenor]

Im getting this error with nuxt in ssr mode, how to fix. Is unhandledRejection the best way to handle it? @danielroe @pangxieju