Trace warnings in debug mode

[helfi92]

When running in debug mode, we should use the trace-warnings flag to print stack traces for process warnings.

[Shruti9520]

Hi,
Can I work on this issue?

[edmorley]

After #852 we don't have a Neutrino binary that's used as the only entrypoint any more, so presumably this would have to be done via something like process.on('warning', e => console.warn(e.stack)); ?
https://nodejs.org/api/process.html#process_event_warning

That said, is this still worth it - given people can just node --trace-warnings ... or NODE_OPTIONS='--trace-warnings' webpack ... etc?

[eliperelman]

I'd say no, let's close.