Summary: Currently on error I have following output:
```
ERROR Packager can't listen on port 8081
Most likely another process is already using this port
Run the following command to find out which process:
lsof -n -i4TCP:8081
You can either shut down the other process:
kill -9 <PID>
or run packager on different port.
See http://facebook.github.io/react-native/docs/troubleshooting.html
for common problems and solutions.
/Users/nucleartux/Work/projects/react-native/local-cli/server/server.js:90
if (error.code === 'EADDRINUSE') {
^
TypeError: Cannot read property 'code' of undefined
at process.<anonymous> (/Users/nucleartux/Work/projects/react-native/local-cli/server/server.js:104:14)
at emitOne (events.js:77:13)
at process.emit (events.js:169:7)
at process._fatalException (node.js:211:26)
```
Closes https://github.com/facebook/react-native/pull/3765
Reviewed By: svcscm
Differential Revision: D2595537
Pulled By: martinbigio
fb-gh-sync-id: e11ec2e6e8794bf5fe7570e27cd327777d8b300c
95972cfd08