Haskell SPC m h bindings not working

[tko]

1. With haskell layer (and shm mode) enabled open a test.hs file with following contents:

   import Control.Monad (when)
   
   main = when True $ putStrLn "Hello"

2. Move the cursor to the latter when

3. Press SPC m h t or SPC m h i

Expected result: identifier/type information as documented

Actual result: Error: <interactive>:1:1-4: Not in scope: ‘when’

(This is after executing haskell-session-change as suggested in the first error when trying these keybindings.)

[tko]

SPC m h T is similar

It looks like those key bindings aren't operating on the code that's in the buffer, but rather the code that's in the repl running in the background, e.g. previously sent with SPC m s b or something.

I must be misunderstanding ghc-mod and/or how the packages are interacting; I have haskell-enable-ghc-mod-support enabled and from what I recall from vim ghc-mod is able to give the type info without any extra steps.

[tko]

There's another PR #3199 to bind the ghc-mod functions to even shorter prefix.

[d12frosted]

When you enable interactive-haskell-mode - those bindings require associated REPL. If you disable it, but still have ghc-mod - C-c C-t will be bound to ghc-show-type function.

[d12frosted]

@syl20bnr this is fixed by #3345 😄