Error after init

[trusktr]

I did

vue init pwa test

then

cd test
npm i
npm run dev

which results in

 DONE  Compiled successfully in 3883ms                                                                                                       23:06:41

> Listening at http://localhost:8080

(node:31219) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): Error: Exited with code 3
(node:31219) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will t
erminate the Node.js process with a non-zero exit code.

When I visit localhost:8080, it seems work, so I'm not sure if something's wrong.

[trusktr]

I'm not sure how to successfully pass --trace-warnings to be able to see what's causing the problem. The following two don't work:

npm run dev --trace-warnings
node `which npm` --trace-warnings run dev

How can I see what's making the error?

[johnathankent]

What version of node and npm are you using?

[miyako-ep]

I'm getting the same issue.

# node --version
v8.11.2
# npm --version
5.6.0