Syntax error after hlint refactor

[augustss]

Applying a refactoring from hlint produces a syntactically wrong result.

Your environment

myproject$ haskell-language-server --probe-tools
haskell-language-server version: 1.1.0.0 (GHC: 8.10.4) (PATH: C:\Users\lennart.augustsson\AppData\Roaming\cabal\bin\haskell-language-server.exe)
Tool versions found on the $PATH
cabal:          3.4.0.0
stack:          Not found
ghc:            8.10.4

Which OS do you use:
Windows

Which lsp-client do you use:
emacs

Steps to reproduce

Use this file:

module M where
import GHC.Stack
foo :: (HasCallStack) => Int
foo = undefined

Apply the suggest refactoring to remove redundant parens.

Expected behaviour

The result should be

foo :: HasCallStack => Int

Actual behaviour

The result is

foo :: (HasCallStack => Int

[Ailrun]

Thank you for the great report! I can reproduce the behaviour with your example.
However, I can also reproduce the issue only with hlint command line, so it's probably an upstream issue.

[jneira]

Upstream issue mpickering/apply-refact#112

[jneira]

Hi, apply-refact maintainer has fixed the bug and made a new release (0.9.3.0). As we have >=0.9 in the .cabal file, updating the index-state in cabal.project, setting the new version in all stack.yaml's and building from master should fix the issue.

[jneira]

The issue should be resolved in master, we will have to wait to the next release to close this defintely

[jneira]

The fix is included in hls-1.2.0