Is this a bug report?

yes

Can you also reproduce the problem with npm 4.x?

(Write your answer here.)

Which terms did you search for in User Guide?

(Write your answer here if relevant.)

Environment

1. npm ls react-scripts-ts (if you haven’t ejected):

2. node -v:

3. npm -v:

4. yarn --version (if you use Yarn):

5. npm ls react-scripts-ts (if you haven’t ejected):
   node version: 10.11.0
   Then, specify:

6. Operating system: freeBSD

7. Browser and version (if relevant):

Steps to Reproduce

run npm start on free bsd

(Write your steps here:)

1. run npm start on free bsd

Expected Behavior

run without problem

(Write what you thought would happen.)

Actual Behavior

Attempting to bind to HOST environment variable: xvas
If this was unintentional, check that you haven't mistakenly set it in your shell.
Learn more here: http://bit.ly/2mwWSwH

Starting type checking and linting service...
Using 1 worker with 2048MB memory limit
Watching: /root/imi-panel-web/src
ts-loader: Using typescript@2.9.2 and /root/imi-panel-web/tsconfig.json
events.js:167
throw er; // Unhandled 'error' event
^

Error: getaddrinfo ENOTFOUND xvas
at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:57:26)
Emitted 'error' event at:
at GetAddrInfoReqWrap.doListen [as callback] (net.js:1457:12)
at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:57:17)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! imi-panel-web@0.1.0 start: node scripts/start.js
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the imi-panel-web@0.1.0 start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
(Write what happened. Please add screenshots!)

Reproducible Demo

(Paste the link to an example project and exact instructions to reproduce the issue.)