Using ghcmod-vim with neocomplete and ghc-mod-5.0.1 causes errors

[wraithm]

When I start up vim with a haskell file, I get the following:

Error detected while processing function ghcmod#util#check_version..ghcmod#util#ghc_mod_version..vimp
roc#system..<SNR>94_system:
line   89:
E605: Exception not caught: vimproc: vp_pipe_read: *hex*
Error detected while processing function ghcmod#util#check_version..ghcmod#util#ghc_mod_version:
line    2:
E171: Missing :endif
Error detected while processing ~/.vim/bundle/ghcmod-vim/after/ftplugin/haskell/ghcmod.vim:
line   31:
E171: Missing :endif
Error detected while processing function neocomplete#init#enable..neocomplete#init#_sources..neocompl
ete#sources#ghc#define..necoghc#ghc_mod_version..<SNR>130_system..vimproc#system..<SNR>94_system:
line   89:
E605: Exception not caught: vimproc: vp_pipe_read: *hex*
Error detected while processing function neocomplete#init#enable..neocomplete#init#_sources:
line   32:
E170: Missing :endfor
Press ENTER or type command to continue

[alex404]

I'm getting this as well.

[wraithm]

I think some of the issue is related to the text that gets printed out when ghc-mod can't build a project. ghcmod-vim can't parse it. I've found that I no longer get errors after I successfully get a project to build. Try running ghc-mod from the command line in your project and getting the project to build.

[alex404]

Indeed, when things build properly it's fine. It would be nice if that didn't happen, but I guess that's more of a problem for vimproc?

[evansb]

The parsing is fine, I think this is a vimproc problem. Try invoking this on vim manually.

call vimproc#system(['ghc-mod'])

[evansb]

Err, so I run make on my vimproc and it resolves the problem.

See : https://github.com/eagletmt/neco-ghc/issues/33

[wraithm]

I had looked into that. I still have some issues after updating vimproc. Especially when I haven't run cabal build in my project. It definitely seems to be a problem with ghc-mod creating unexpected input for ghcmod-vim.

On Sun, Aug 31, 2014 at 4:43 AM, Evan Sebastian notifications@github.com wrote:

Err, so I run make on my vimproc and it resolves the problem.

See : eagletmt/neco-ghc#33 https://github.com/eagletmt/neco-ghc/issues/33

— Reply to this email directly or view it on GitHub https://github.com/eagletmt/ghcmod-vim/issues/56#issuecomment-53982860.

[eagletmt]

I tried ghc-mod 5.0.1.1 compiled by GHC 7.8.3 and it seems working for me except for :echo ghcmod#util#ghc_mod_version() shows [5, 0, 1].

@WraithM @alex404 Could you paste the Haskell code that causes ghcmod-vim errors?

[evansb]

@eagletmt

It ignores the last number "1" because the regex that follows captures 3 instead of 4 digits, but as far as I'm concerned, it shouldn't been any problem.

@WraithM @alex404

Maybe you can try playing with the regex below, like changing it more specific to ghc-mod version \(\d\+\)\.\(\d\+\)\.\(\d\+\)\.\(\d\+\)

[eagletmt]

Yeah, the minor bug of version extraction doesn't cause any problems. I won't fix it.

[eagletmt]

Fixed in #57 .