Blahblah: https://gist.github.com/yalab/cad361056bae02a5f45d1ace7f1d86ef

If Webpacker fails to compile your Javascripts without including any output:

[Webpacker] Compiling…
[Webpacker] Compilation failed:

Try running webpacker from the command line:

$ ./bin/webpack --progress --profile