--error-file does not output the json diagnostics from GHC

[jasagredo]

What happened?

I'm running the following:

ghciwatch --command="cabal repl --repl-options=-ddump-json test-dev" --watch .  --error-file=ghc-out.json

When I introduce errors in the file, I see the json diagnostics from GHC pop-up in the ghciwatch process, but the file ghc-out.json is empty.

I was planning on using this as an activateCommand for alloglot, in the same spirit as the one described on its readme:

"alloglot.activateCommand": "ghcid --command=\"cabal repl --ghc-options=-ddump-json\" --output=\"ghc-out.json\""

What did you expect to happen?

No response

Steps to reproduce the issue

Run the above command, and cat ghc-out.json.

The version of ghciwatch with the bug

1.0.1

[jasagredo]

I found this PR and reverse-engineering what it seemed to do I found out that it can be integrated into static-ls via outputting normal error output to ghcid.txt. So probably I don't need the feature above to be fixed.