Hacky but effective navigate to ghcid error with vim.. Might fail with spaces.

ghcid.sh

ghcid -o /tmp2/err.ghcid --command='cabal v2-repl app' 

vim.vim

fun! NavigateToGhcidError()
  let g:myHaskellSrcPath = system('head -n 1 /tmp2/err.ghcid | cut -d":" -f1 | tr -d "\n"')
  let g:myHaskellSrcLine = system('head -n 1 /tmp2/err.ghcid | cut -d":" -f2 | tr -d "\n"')

  execute "normal! :e ". g:myHaskellSrcPath . "<CR>"
  execute "normal! ". g:myHaskellSrcLine . "gg<CR>"

endfun
command! NavigateToGhcidError call NavigateToGhcidError()
map <leader>ge :NavigateToGhcidError<cr>