Failing build crashes styleguide dev server (and doesn't output errors)

[tomas-hartman]

Current behavior

Styleguidist's dev server does not output errors into terminal and needs to be fully restarted if build fails. It often happens after a silly mistake such as "const variable =" and it is very annoying, because when I make such mistake before I build styleguide, I have no error output at all and no notification that the build failed. I noticed that this might be caused by my packages and their dependencies that we use in our project.

To reproduce

I was able to create repro of the crash when build fails, but I was not able to reproduce the output not coming to the terminal (I did not focus that much on this part, since it is covered in #1822).

git clone https://github.com/tomas-hartman/example.git
git checkout bug
npm install
npm run start

# 1. wait for 'compiled successfully'
# 2. go to src/components/Button.tsx and uncomment L36, save and let styleguide rebuild
# 3. check localhost:6060 (blank page with error in browser console)
# 4. comment L36 and save
# 5. dev server crashed, no rebuild happened

Expected behavior

Everything should work exactly like in master branch of the example:

1. I expect that I don't need to restart dev-server after trivial build fail
2. I expect that all errors are still outputed into terminal (not visible in enclosed repro)

I suppose that this might be caused by mutually incompatible dependencies, but I am not sure of that.
It also might be related to #1822, #1785 and (perhaps) #1703.

[stale]

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