Stream closed

[ParkinWu]

I always get this error message，what can I do about it?
Error in communication with ghc-mod: Stream closed. Check if GHC SDK is set and ghc-mod is okay. ghc-mod will not be called for 5 seconds. Command was: check /Users/pzwu/outwork/haskell/yesodtest/app/Main.hs

my config
cabal: /usr/local/bin/cabal
hlint: /Users/pzwu/.cabal/bin/hlint
haskell-docs: /Users/pzwu/.local/bin/haskell-docs
ghc-mod: /Users/pzwu/.cabal/bin/ghc-mod

[rikvdkleij]

Check if you can call ghc-mod from command line in root of your Haskell project

[ParkinWu]

Thank you for your reply，I have tried this ghc-mod command in root of my project
pzwus-imac:yesodtest pzwu$ /Users/pzwu/.cabal/bin/ghc-mod info /Users/pzwu/outwork/haskell/yesodtest/app/Main.hs someFunc
and I got this, does that mean my ghc-mod configuration is correct？
someFunc :: IO () -- Defined at src/Lib.hs:6:1

[rikvdkleij]

Yes, can you also try to run:
ghc-mod legacy-interactive
in root of your Haskell project.

[marcgrr]

I think I am having the same problem.

My config is:

ghc-mod: /Users/marc/Library/Haskell/bin/ghc-mod
haskell-docs: /Users/marc/Library/Haskell/bin/haskell-docs
hlint: /Users/marc/Library/Haskell/bin/hlint
cabal: /Users/marc/Library/Haskell/bin/cabal

I have a simple file:

main :: IO ()
main = putStrLn "hello world!"

When I open it, I get these errors in my intellij:

8:03:06 PM Shutting down ghc-mod for project fbm-shirt.
8:03:06 PM Error while shutting down ghc-mod for project fbm-shirt. Error message: Stream closed
8:03:08 PM Starting ghc-mod in interactive mode for project fbm-shirt.
8:03:13 PM Error in communication with ghc-mod: Futures timed out after [5 seconds]. Check if GHC SDK is set and ghc-mod is okay. ghc-mod will not be called for 5 seconds. Command was: check /Users/marc/side_projects/fbm-shirt/app/Main.hs
8:03:18 PM Error in communication with ghc-mod: Stream closed. Check if GHC SDK is set and ghc-mod is okay. ghc-mod will not be called for 5 seconds. Command was: info /Users/marc/side_projects/fbm-shirt/app/Main.hs main
8:03:37 PM Error in communication with ghc-mod: Stream closed. Check if GHC SDK is set and ghc-mod is okay. ghc-mod will not be called for 5 seconds. Command was: info /Users/marc/side_projects/fbm-shirt/app/Main.hs main

I can run these commands in the root directory of my project:

➜  fbm-shirt  ghc-mod info /Users/marc/side_projects/fbm-shirt/app/Main.hs main
main :: IO ()   -- Defined at app/Main.hs:2:1
➜  fbm-shirt

And I can also do it with ghc-mod legacy-interactive:

➜  fbm-shirt  ghc-mod legacy-interactive
info /Users/marc/side_projects/fbm-shirt/app/Main.hs main
main :: IO ()   -- Defined at app/Main.hs:2:1
OK

[rikvdkleij]

@ParkinWu @marcgrr Do you use OSX?

[marcgrr]

I do use OSX. I think I have just fixed mine by building the plugin from the latest commit on master! Perhaps one of the latest commits fixes something.

Thanks!!

[rikvdkleij]

Yes, I just fixed a problem especially for OSX. PATH has to passed explicitly when running command line programs from IntelliJ

[rikvdkleij]

Btw, Cabal is replaced by Stack on master

Also important if you want to download all used packages its source code.

[rikvdkleij]

Should be fixed in latest release