Unable to share 'Car Configurator' to web

If you try to share Car configurator demo: 

git@git.qt.io:playground/car-configurator.git to web, you get

1) RCC takin 100% for a long time

2) OS trying to kill RCC compiler as it does not respond

3) The file that RCC generated cannot be opened with WebAssy

Before sharing to web, Qt DS should have some prechecks if sharing can be done

1) errorcode from 'rcc' build?

2) size of the resulting qmlrc: zero

3) qmlrc file exists?