Can't get FixIt to add import

[Aster89]

Your environment

Which OS do you use?
ArchLinux

Which version of GHC do you use and how did you install it?
9.8.2, managed via GHCup

How is your project built (alternative: link to the project)?
Just created a project via cabal init --simple, answering 2) Executable to the first and only question.

Which LSP client (editor/plugin) do you use?
Terminal Vim + YCM

Which version of HLS do you use and how did you install it?
Should be 2.9.0.1, if I understand correctly (see debug info).

Have you configured HLS in any way (especially: a hie.yaml file)?
Not that I'm aware of (and log says definitely I don't have a hie.yaml file), but please ask specific question if anything makes you think I have.

Steps to reproduce

1. Initialize a project with cabal init --simple,
2. add the line f = when,
3. ask for FixIt on when,
4. choose 4, i.e. import Control.Monad (when) (any other will do I guess)

Expected behaviour

import Control.Monad (when) should be added in the preamble of the file.

Actual behaviour

Expected behavior does not happen, and this error is triggered instead:

ResponseFailedException: Request failed: -32601: No plugins are available to handle this SMethod_CodeActionResolve request.
 Plugins installed for this method, but not available to handle this request are:
explicit-fields does not handle resolve requests for (unable to determine resolve owner)).
hlint does not handle resolve requests for (unable to determine resolve owner)).
overloaded-record-dot does not handle resolve requests for (unable to determine resolve owner)).
importLens does not handle resolve requests for (unable to determine resolve owner)).

Debug information

This is the log of the HLS:

No 'hie.yaml' found. Try to discover the project type!
Run entered for haskell-language-server-wrapper(haskell-language-server-wrapper) Version 2.9.0.1 x86_64 ghc-9.10.1
Current directory: /home/enrico/deleteme
Operating system: linux
Arguments: ["--lsp"]
Cradle directory: /home/enrico/deleteme
Cradle type: Cabal

Tool versions found on the $PATH
cabal:          3.12.1.0
stack:          Not found
ghc:            9.8.2


Consulting the cradle to get project GHC version...
2024-12-17T16:50:16.704393Z | Debug | cabal exec -v0 -- ghc --print-libdir
2024-12-17T16:50:16.877467Z | Debug | cabal exec -v0 -- ghc -package-env=- -ignore-dot-ghci -e Control.Monad.join (Control.Monad.fmap System.IO.putStr System.Environment.getExecutablePath)
2024-12-17T16:50:16.951529Z | Debug | cabal --builddir=/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d v2-exec --with-compiler /home/enrico/.cache/hie-bios/wrapper-b54f81dea4c0e6d1626911c526bc4e36 --with-hc-pkg /home/enrico/.cache/hie-bios/ghc-pkg-4dd077f01ab89a1f905d2fbf68335958 ghc -v0 -- --numeric-version
  Environment Variables
    HIE_BIOS_GHC: /home/enrico/.ghcup/ghc/9.8.2/lib/ghc-9.8.2/bin/ghc-9.8.2
    HIE_BIOS_GHC_ARGS: -B/home/enrico/.ghcup/ghc/9.8.2/lib/ghc-9.8.2/lib
Project GHC version: 9.8.2
haskell-language-server exe candidates: ["haskell-language-server-9.8.2","haskell-language-server"]
Launching haskell-language-server exe at:/home/enrico/.ghcup/bin/haskell-language-server-9.8.2
2024-12-17T16:50:17.014191Z | Debug | cabal exec -v0 -- ghc --print-libdir
2024-12-17T16:50:17.154485Z | Debug | cabal exec -v0 -- ghc -package-env=- -ignore-dot-ghci -e Control.Monad.join (Control.Monad.fmap System.IO.putStr System.Environment.getExecutablePath)
2024-12-17T16:50:17.326941Z | Debug | cabal --builddir=/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d v2-exec --with-compiler /home/enrico/.cache/hie-bios/wrapper-b54f81dea4c0e6d1626911c526bc4e36 --with-hc-pkg /home/enrico/.cache/hie-bios/ghc-pkg-4dd077f01ab89a1f905d2fbf68335958 ghc -v0 -- -v0 -package-env=- -ignore-dot-ghci -e Control.Monad.join (Control.Monad.fmap System.IO.putStr System.Environment.getExecutablePath)
  Environment Variables
    HIE_BIOS_GHC: /home/enrico/.ghcup/ghc/9.8.2/lib/ghc-9.8.2/bin/ghc-9.8.2
    HIE_BIOS_GHC_ARGS: -B/home/enrico/.ghcup/ghc/9.8.2/lib/ghc-9.8.2/lib
2024-12-17T16:50:17.393004Z | Debug | cabal exec -v0 -- ghc --print-libdir
2024-12-17T16:50:17.541355Z | Debug | cabal exec -v0 -- ghc -package-env=- -ignore-dot-ghci -e Control.Monad.join (Control.Monad.fmap System.IO.putStr System.Environment.getExecutablePath)
2024-12-17T16:50:17.615097Z | Debug | cabal --builddir=/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d v2-exec --with-compiler /home/enrico/.cache/hie-bios/wrapper-b54f81dea4c0e6d1626911c526bc4e36 --with-hc-pkg /home/enrico/.cache/hie-bios/ghc-pkg-4dd077f01ab89a1f905d2fbf68335958 ghc -v0 -- --print-libdir
  Environment Variables
    HIE_BIOS_GHC: /home/enrico/.ghcup/ghc/9.8.2/lib/ghc-9.8.2/bin/ghc-9.8.2
    HIE_BIOS_GHC_ARGS: -B/home/enrico/.ghcup/ghc/9.8.2/lib/ghc-9.8.2/lib
2024-12-17T16:50:19.074650Z | Info | haskell-language-server version: 2.9.0.1 (GHC: 9.8.2) (PATH: /home/enrico/.ghcup/hls/2.9.0.1/lib/haskell-language-server-2.9.0.1/bin/haskell-language-server-9.8.2)
2024-12-17T16:50:19.075576Z | Info | Directory: /home/enrico/deleteme
2024-12-17T16:50:19.075750Z | Info | Starting (haskell-language-server) LSP server...
  GhcideArguments {argsCommand = LSP, argsCwd = Nothing, argsShakeProfiling = Nothing, argsTesting = False, argsExamplePlugin = False, argsLogLevel = Info, argsLogFile = Nothing, argsLogStderr = True, argsLogClient = False, argsThreads = 0, argsProjectGhcVersion = False}
  PluginIds: [ pragmas-suggest
             , pragmas-completion
             , ghcide-code-actions-bindings
             , ghcide-extend-import-action
             , retrie
             , stylish-haskell
             , explicit-fields
             , ghcide-code-actions-type-signatures
             , ghcide-code-actions-fill-holes
             , stan
             , hlint
             , changeTypeSignature
             , ghcide-code-actions-imports-exports
             , cabal-fmt
             , notes
             , ghcide-completions
             , eval
             , ghcide-type-lenses
             , cabal
             , overloaded-record-dot
             , gadt
             , LSPRecorderCallback
             , importLens
             , floskell
             , codeRange
             , class
             , ormolu
             , qualifyImportedNames
             , ghcide-hover-and-symbols
             , alternateNumberFormat
             , rename
             , splice
             , moduleName
             , semanticTokens
             , fourmolu
             , cabal-gild
             , callHierarchy
             , ghcide-core
             , explicit-fixity
             , pragmas-disable ]
2024-12-17T16:50:19.078922Z | Info | Logging heap statistics every 60.00s
 2024-12-17T16:50:19.114935Z | Info | Starting LSP server...
  If you are seeing this in a terminal, you probably should have run WITHOUT the --lsp option!
  PluginIds: [ pragmas-suggest
             , pragmas-completion
             , ghcide-code-actions-bindings
             , ghcide-extend-import-action
             , retrie
             , stylish-haskell
             , explicit-fields
             , ghcide-code-actions-type-signatures
             , ghcide-code-actions-fill-holes
             , stan
             , hlint
             , changeTypeSignature
             , ghcide-code-actions-imports-exports
             , cabal-fmt
             , notes
             , ghcide-completions
             , eval
             , ghcide-type-lenses
             , cabal
             , overloaded-record-dot
             , gadt
             , LSPRecorderCallback
             , importLens
             , floskell
             , codeRange
             , class
             , ormolu
             , qualifyImportedNames
             , ghcide-hover-and-symbols
             , alternateNumberFormat
             , rename
             , splice
             , moduleName
             , semanticTokens
             , fourmolu
             , cabal-gild
             , callHierarchy
             , ghcide-core
             , explicit-fixity
             , pragmas-disable ]
2024-12-17T16:50:19.115439Z | Info | Starting server
2024-12-17T16:50:19.117428Z | Info | Registering IDE configuration: IdeConfiguration {workspaceFolders = fromList [NormalizedUri 3429100310501239661 "file:///home/enrico/deleteme"], clientSettings = hashed (Just (Object (fromList [])))}
2024-12-17T16:50:19.124235Z | Info | Started LSP server in 0.01s
2024-12-17T16:50:19.465468Z | Warning | LSP: can't register dynamically for: "workspace/didChangeConfiguration"
2024-12-17T16:50:19.471055Z | Info | Cradle path: app/Main.hs
2024-12-17T16:50:19.471207Z | Warning | No [cradle](https://github.com/mpickering/hie-bios#hie-bios) found for app/Main.hs.
Proceeding with [implicit cradle](https://hackage.haskell.org/package/implicit-hie).
You should ignore this message, unless you see a 'Multi Cradle: No prefixes matched' error.
2024-12-17T16:50:19.473468Z | Info | invoking build tool to determine build flags (this may take some time depending on the cache)
2024-12-17T16:50:19.843868Z | Info | Load cabal cradle using single file
2024-12-17T16:50:20.160300Z | Info | cabal --builddir=/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d v2-repl --with-compiler /home/enrico/.cache/hie-bios/wrapper-b54f81dea4c0e6d1626911c526bc4e36 --with-hc-pkg /home/enrico/.cache/hie-bios/ghc-pkg-4dd077f01ab89a1f905d2fbf68335958 /home/enrico/deleteme/app/Main.hs
  Environment Variables
    HIE_BIOS_OUTPUT: /tmp/HIE_BIOS_OUTPUT457387-0
    HIE_BIOS_GHC: /home/enrico/.ghcup/ghc/9.8.2/lib/ghc-9.8.2/bin/ghc-9.8.2
    HIE_BIOS_GHC_ARGS: -B/home/enrico/.ghcup/ghc/9.8.2/lib/ghc-9.8.2/lib
2024-12-17T16:50:22.061086Z | Info | Interface files cache directory: /home/enrico/.cache/ghcide/deleteme-0.1.0.0-inplace-deleteme-c38452dbce672bbfc236ac73975e156b42d15720
2024-12-17T16:50:22.070915Z | Info | Making new HscEnv. In-place unit ids: [deleteme-0.1.0.0-inplace-deleteme]
2024-12-17T16:50:27.362922Z | Warning | No plugin handles this "codeAction/resolve" request.

[fendor]

Hi, thank you for the bug report!

Unfortunately, I can not reproduce the described issue on GHC 9.6.6 or 9.8.2.
Perhaps something else is broken in addition?
Try running HLS with --debug and please share the logs of HLS, showing that the CodeAction failed.

The --log-file option might be handy for obtaining the logs.

[Aster89]

Content of the log file after executing

haskell-language-server-9.8.2 --debug --log-file log

is

2024-12-18T05:43:40.539010Z | Info | haskell-language-server version: 2.9.0.1 (GHC: 9.8.2) (PATH: /home/enrico/.ghcup/hls/2.9.0.1/lib/haskell-language-server-2.9.0.1/bin/haskell-language-server-9.8.2)
2024-12-18T05:43:40.540443Z | Info | Directory: /home/enrico/deleteme
2024-12-18T05:43:40.541007Z | Info | Logging heap statistics every 60.00s
2024-12-18T05:43:40.549981Z | Debug | Initializing exports map from hiedb
2024-12-18T05:43:40.550893Z | Debug | Shake session initialized
2024-12-18T05:43:40.550983Z | Debug | Done initializing exports map from hiedb. Size: 1
2024-12-18T05:43:40.552415Z | Info | Cradle path: app/Main.hs
2024-12-18T05:43:40.552559Z | Warning | No [cradle](https://github.com/mpickering/hie-bios#hie-bios) found for app/Main.hs.
Proceeding with [implicit cradle](https://hackage.haskell.org/package/implicit-hie).
You should ignore this message, unless you see a 'Multi Cradle: No prefixes matched' error.
2024-12-18T05:43:40.553925Z | Debug | Cradle: Cradle{ cradleRootDir = "/home/enrico/deleteme", cradleOptsProg = CradleAction: Cabal}
2024-12-18T05:43:40.554036Z | Info | invoking build tool to determine build flags (this may take some time depending on the cache)
2024-12-18T05:43:40.554141Z | Debug | Requested to load Cabal cradle using single file mode
2024-12-18T05:43:40.570547Z | Debug | cabal --numeric-version
2024-12-18T05:43:40.643976Z | Debug | cabal exec -v0 -- ghc --print-libdir
2024-12-18T05:43:40.814754Z | Debug | cabal exec -v0 -- ghc -package-env=- -ignore-dot-ghci -e Control.Monad.join (Control.Monad.fmap System.IO.putStr System.Environment.getExecutablePath)
2024-12-18T05:43:40.893639Z | Debug | cabal --builddir=/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d v2-exec --with-compiler /home/enrico/.cache/hie-bios/wrapper-b54f81dea4c0e6d1626911c526bc4e36 --with-hc-pkg /home/enrico/.cache/hie-bios/ghc-pkg-4dd077f01ab89a1f905d2fbf68335958 ghc -v0 -- --numeric-version
  Environment Variables
    HIE_BIOS_GHC: /home/enrico/.ghcup/ghc/9.8.2/lib/ghc-9.8.2/bin/ghc-9.8.2
    HIE_BIOS_GHC_ARGS: -B/home/enrico/.ghcup/ghc/9.8.2/lib/ghc-9.8.2/lib
2024-12-18T05:43:40.894044Z | Info | Load cabal cradle using single file
2024-12-18T05:43:40.967535Z | Debug | cabal exec -v0 -- ghc --print-libdir
2024-12-18T05:43:41.142553Z | Debug | cabal exec -v0 -- ghc -package-env=- -ignore-dot-ghci -e Control.Monad.join (Control.Monad.fmap System.IO.putStr System.Environment.getExecutablePath)
2024-12-18T05:43:41.143869Z | Info | cabal --builddir=/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d v2-repl --with-compiler /home/enrico/.cache/hie-bios/wrapper-b54f81dea4c0e6d1626911c526bc4e36 --with-hc-pkg /home/enrico/.cache/hie-bios/ghc-pkg-4dd077f01ab89a1f905d2fbf68335958 /home/enrico/deleteme/app/Main.hs
  Environment Variables
    HIE_BIOS_OUTPUT: /tmp/HIE_BIOS_OUTPUT531385-0
    HIE_BIOS_GHC: /home/enrico/.ghcup/ghc/9.8.2/lib/ghc-9.8.2/bin/ghc-9.8.2
    HIE_BIOS_GHC_ARGS: -B/home/enrico/.ghcup/ghc/9.8.2/lib/ghc-9.8.2/lib
2024-12-18T05:43:41.180003Z | Debug | Build profile: -w ghc-9.8.2 -O1
2024-12-18T05:43:41.180269Z | Debug | In order, the following will be built (use -v for more details):
2024-12-18T05:43:41.180488Z | Debug |  - deleteme-0.1.0.0 (interactive) (exe:deleteme) (first run)
2024-12-18T05:43:41.229324Z | Debug | Preprocessing executable 'deleteme' for deleteme-0.1.0.0...
2024-12-18T05:43:41.319062Z | Debug | cabal exec -v0 -- ghc --print-libdir
2024-12-18T05:43:41.502514Z | Debug | cabal exec -v0 -- ghc -package-env=- -ignore-dot-ghci -e Control.Monad.join (Control.Monad.fmap System.IO.putStr System.Environment.getExecutablePath)
2024-12-18T05:43:41.576949Z | Debug | cabal --builddir=/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d v2-exec --with-compiler /home/enrico/.cache/hie-bios/wrapper-b54f81dea4c0e6d1626911c526bc4e36 --with-hc-pkg /home/enrico/.cache/hie-bios/ghc-pkg-4dd077f01ab89a1f905d2fbf68335958 ghc -v0 -- --print-libdir
  Environment Variables
    HIE_BIOS_GHC: /home/enrico/.ghcup/ghc/9.8.2/lib/ghc-9.8.2/bin/ghc-9.8.2
    HIE_BIOS_GHC_ARGS: -B/home/enrico/.ghcup/ghc/9.8.2/lib/ghc-9.8.2/lib
2024-12-18T05:43:41.648805Z | Debug | cabal exec -v0 -- ghc --print-libdir
2024-12-18T05:43:41.805443Z | Debug | cabal exec -v0 -- ghc -package-env=- -ignore-dot-ghci -e Control.Monad.join (Control.Monad.fmap System.IO.putStr System.Environment.getExecutablePath)
2024-12-18T05:43:41.881264Z | Debug | cabal --builddir=/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d v2-exec --with-compiler /home/enrico/.cache/hie-bios/wrapper-b54f81dea4c0e6d1626911c526bc4e36 --with-hc-pkg /home/enrico/.cache/hie-bios/ghc-pkg-4dd077f01ab89a1f905d2fbf68335958 ghc -v0 -- --numeric-version
  Environment Variables
    HIE_BIOS_GHC: /home/enrico/.ghcup/ghc/9.8.2/lib/ghc-9.8.2/bin/ghc-9.8.2
    HIE_BIOS_GHC_ARGS: -B/home/enrico/.ghcup/ghc/9.8.2/lib/ghc-9.8.2/lib
2024-12-18T05:43:41.881694Z | Debug | Session loading result: Right (ComponentOptions {componentOptions = ["-fbuilding-cabal-package","-O0","-outputdir","/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d/build/x86_64-linux/ghc-9.8.2/deleteme-0.1.0.0/x/deleteme/build/deleteme/deleteme-tmp","-odir","/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d/build/x86_64-linux/ghc-9.8.2/deleteme-0.1.0.0/x/deleteme/build/deleteme/deleteme-tmp","-hidir","/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d/build/x86_64-linux/ghc-9.8.2/deleteme-0.1.0.0/x/deleteme/build/deleteme/deleteme-tmp","-hiedir","/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d/build/x86_64-linux/ghc-9.8.2/deleteme-0.1.0.0/x/deleteme/build/deleteme/deleteme-tmp/extra-compilation-artifacts/hie","-stubdir","/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d/build/x86_64-linux/ghc-9.8.2/deleteme-0.1.0.0/x/deleteme/build/deleteme/deleteme-tmp","-i","-iapp","-i/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d/build/x86_64-linux/ghc-9.8.2/deleteme-0.1.0.0/x/deleteme/build/deleteme/deleteme-tmp","-i/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d/build/x86_64-linux/ghc-9.8.2/deleteme-0.1.0.0/x/deleteme/build/deleteme/autogen","-i/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d/build/x86_64-linux/ghc-9.8.2/deleteme-0.1.0.0/x/deleteme/build/global-autogen","-I/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d/build/x86_64-linux/ghc-9.8.2/deleteme-0.1.0.0/x/deleteme/build/deleteme/autogen","-I/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d/build/x86_64-linux/ghc-9.8.2/deleteme-0.1.0.0/x/deleteme/build/global-autogen","-I/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d/build/x86_64-linux/ghc-9.8.2/deleteme-0.1.0.0/x/deleteme/build/deleteme/deleteme-tmp","-optP-include","-optP/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d/build/x86_64-linux/ghc-9.8.2/deleteme-0.1.0.0/x/deleteme/build/deleteme/autogen/cabal_macros.h","-this-unit-id","deleteme-0.1.0.0-inplace-deleteme","-hide-all-packages","-Wmissing-home-modules","-no-user-package-db","-package-db","/home/enrico/.cabal/store/ghc-9.8.2-32bd/package.db","-package-db","/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d/packagedb/ghc-9.8.2","-package-db","/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d/build/x86_64-linux/ghc-9.8.2/deleteme-0.1.0.0/x/deleteme/package.conf.inplace","-package-id","base-4.19.1.0-9254","-XHaskell2010","app/Main.hs","-Wall","-hide-all-packages"], componentRoot = "/home/enrico/deleteme", componentDependencies = ["deleteme.cabal","cabal.project","cabal.project.local"]},"/home/enrico/.ghcup/ghc/9.8.2/lib/ghc-9.8.2/lib","9.8.2")
2024-12-18T05:43:41.899007Z | Info | Interface files cache directory: /home/enrico/.cache/ghcide/deleteme-0.1.0.0-inplace-deleteme-c38452dbce672bbfc236ac73975e156b42d15720
2024-12-18T05:43:41.908514Z | Info | Making new HscEnv. In-place unit ids: [deleteme-0.1.0.0-inplace-deleteme]
2024-12-18T05:43:41.933924Z | Debug | New component cache HscEnvEq: (([],Just HscEnvEq 4),fromList [("cabal.project",Nothing),("cabal.project.local",Nothing),("deleteme.cabal",Just 2024-12-18 05:42:51.5519241 UTC)])
2024-12-18T05:43:41.934762Z | Debug | Finished build session
AsyncCancelled
2024-12-18T05:43:41.935025Z | Debug | Known files updated:
  fromList [(TargetFile NormalizedFilePath "/home/enrico/deleteme/app/Main.hs",fromList ["/home/enrico/deleteme/app/Main.hs"])]
2024-12-18T05:43:41.935194Z | Debug | Restarting build session due to new component
Action Queue: [User TypeCheck]
Keys: [GhcSessionIO; , GetKnownTargets; ]
Aborting previous build session took 0.00s 
2024-12-18T05:43:41.935575Z | Debug | hlint: Getting hlint ideas for  NormalizedFilePath "/home/enrico/deleteme/app/Main.hs"
2024-12-18T05:43:42.186122Z | Debug | hlint: Using extensions for  NormalizedFilePath "/home/enrico/deleteme/app/Main.hs": [ MonomorphismRestriction
                                                                                     , DeepSubsumption
                                                                                     , RelaxedPolyRec
                                                                                     , ForeignFunctionInterface
                                                                                     , ImplicitPrelude
                                                                                     , DoAndIfThenElse
                                                                                     , EmptyDataDecls
                                                                                     , PatternGuards
                                                                                     , DatatypeContexts
                                                                                     , TraditionalRecordSyntax
                                                                                     , StarIsType
                                                                                     , CUSKs
                                                                                     , FieldSelectors ]
2024-12-18T05:43:42.226668Z | Info | updateFileDiagnostics published different from new diagnostics - file diagnostics: File:     /home/enrico/deleteme/app/Main.hs
Hidden:   no
Range:    6:1-6:2
Source:   typecheck
Severity: DiagnosticSeverity_Warning
Message:  �[0;93mTop-level binding with no type signature: f :: p�[0m
File:     /home/enrico/deleteme/app/Main.hs
Hidden:   no
Range:    6:5-6:9
Source:   typecheck
Severity: DiagnosticSeverity_Error
Message:  �[0;91mVariable not in scope: when�[0m
2024-12-18T05:43:42.226940Z | Debug | Finished: User TypeCheck Took: 0.29s
2024-12-18T05:43:42.228840Z | Debug | Finished: GetHie Took: 0.00s
2024-12-18T05:43:42.233762Z | Debug | Finished: GenerateCore Took: 0.00s

[fendor]

Can you try to execute the CodeAction in your editor while passing these flags to HLS?

[Aster89]

@fendor , would you mind clarifying which flags?

[fendor]

The flags --debug and --log-file :) If you run it in CLI mode, we can't see whether the code action execution failed in any way. So, ideally we get the logs of a real IDE run, with the additional logging output, where you try to use the code action, but HLS throws an error unexpectedly.

[Aster89]

I've passed those options to HLS via the IDE (Vim+YCM); here's the log:

2024-12-19T16:02:59.672766Z | Info | haskell-language-server version: 2.9.0.1 (GHC: 9.8.2) (PATH: /home/enrico/.ghcup/hls/2.9.0.1/lib/haskell-language-server-2.9.0.1/bin/haskell-language-server-9.8.2)
2024-12-19T16:02:59.674051Z | Info | Directory: /home/enrico/deleteme
2024-12-19T16:02:59.674318Z | Info | Starting (haskell-language-server) LSP server...
  GhcideArguments {argsCommand = LSP, argsCwd = Nothing, argsShakeProfiling = Nothing, argsTesting = False, argsExamplePlugin = False, argsLogLevel = Debug, argsLogFile = Just "/home/enrico/log", argsLogStderr = True, argsLogClient = False, argsThreads = 0, argsProjectGhcVersion = False}
  PluginIds: [ pragmas-suggest
             , pragmas-completion
             , ghcide-code-actions-bindings
             , ghcide-extend-import-action
             , retrie
             , stylish-haskell
             , explicit-fields
             , ghcide-code-actions-type-signatures
             , ghcide-code-actions-fill-holes
             , stan
             , hlint
             , changeTypeSignature
             , ghcide-code-actions-imports-exports
             , cabal-fmt
             , notes
             , ghcide-completions
             , eval
             , ghcide-type-lenses
             , cabal
             , overloaded-record-dot
             , gadt
             , LSPRecorderCallback
             , importLens
             , floskell
             , codeRange
             , class
             , ormolu
             , qualifyImportedNames
             , ghcide-hover-and-symbols
             , alternateNumberFormat
             , rename
             , splice
             , moduleName
             , semanticTokens
             , fourmolu
             , cabal-gild
             , callHierarchy
             , ghcide-core
             , explicit-fixity
             , pragmas-disable ]
2024-12-19T16:02:59.677953Z | Info | Logging heap statistics every 60.00s
2024-12-19T16:02:59.709605Z | Info | Starting LSP server...
  If you are seeing this in a terminal, you probably should have run WITHOUT the --lsp option!
  PluginIds: [ pragmas-suggest
             , pragmas-completion
             , ghcide-code-actions-bindings
             , ghcide-extend-import-action
             , retrie
             , stylish-haskell
             , explicit-fields
             , ghcide-code-actions-type-signatures
             , ghcide-code-actions-fill-holes
             , stan
             , hlint
             , changeTypeSignature
             , ghcide-code-actions-imports-exports
             , cabal-fmt
             , notes
             , ghcide-completions
             , eval
             , ghcide-type-lenses
             , cabal
             , overloaded-record-dot
             , gadt
             , LSPRecorderCallback
             , importLens
             , floskell
             , codeRange
             , class
             , ormolu
             , qualifyImportedNames
             , ghcide-hover-and-symbols
             , alternateNumberFormat
             , rename
             , splice
             , moduleName
             , semanticTokens
             , fourmolu
             , cabal-gild
             , callHierarchy
             , ghcide-core
             , explicit-fixity
             , pragmas-disable ]
2024-12-19T16:02:59.710212Z | Info | Starting server
2024-12-19T16:02:59.711451Z | Debug | LSP: set new config: {  }
2024-12-19T16:02:59.712056Z | Info | Registering IDE configuration: IdeConfiguration {workspaceFolders = fromList [NormalizedUri 3429100310501239661 "file:///home/enrico/deleteme"], clientSettings = hashed (Just (Object (fromList [])))}
2024-12-19T16:02:59.723196Z | Info | Started LSP server in 0.01s
2024-12-19T16:02:59.794511Z | Debug | cabal exec -v0 -- ghc --print-libdir
2024-12-19T16:02:59.960429Z | Debug | cabal exec -v0 -- ghc -package-env=- -ignore-dot-ghci -e Control.Monad.join (Control.Monad.fmap System.IO.putStr System.Environment.getExecutablePath)
2024-12-19T16:03:00.039383Z | Debug | cabal --builddir=/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d v2-exec --with-compiler /home/enrico/.cache/hie-bios/wrapper-b54f81dea4c0e6d1626911c526bc4e36 --with-hc-pkg /home/enrico/.cache/hie-bios/ghc-pkg-4dd077f01ab89a1f905d2fbf68335958 ghc -v0 -- --print-libdir
  Environment Variables
    HIE_BIOS_GHC: /home/enrico/.ghcup/ghc/9.8.2/lib/ghc-9.8.2/bin/ghc-9.8.2
    HIE_BIOS_GHC_ARGS: -B/home/enrico/.ghcup/ghc/9.8.2/lib/ghc-9.8.2/lib
2024-12-19T16:03:00.042270Z | Debug | Setting initial dynflags...
2024-12-19T16:03:00.042498Z | Debug | shouldRunSubset: True
2024-12-19T16:03:00.042685Z | Debug | Initializing exports map from hiedb
2024-12-19T16:03:00.043948Z | Debug | Done initializing exports map from hiedb. Size: 2
2024-12-19T16:03:00.044252Z | Warning | LSP: can't register dynamically for: "workspace/didChangeConfiguration"
2024-12-19T16:03:00.044440Z | Debug | LSP: not requesting configuration since the client does not support workspace/configuration
2024-12-19T16:03:00.044629Z | Debug | LSP: set new config: {  }
2024-12-19T16:03:00.044962Z | Debug | Shake session initialized
2024-12-19T16:03:00.044999Z | Debug | Configuration changed: Config {checkParents = CheckOnSave, checkProject = True, formattingProvider = "ormolu", cabalFormattingProvider = "cabal-gild", maxCompletions = 40, sessionLoading = PreferSingleComponentLoading, plugins = fromList []}
2024-12-19T16:03:00.045425Z | Debug | Restarting build session due to config change
Action Queue: []
Keys: [GetClientSettings; ]
Aborting previous build session took 0.00s 
2024-12-19T16:03:00.045770Z | Debug | LSP: not requesting configuration since the client does not support workspace/configuration
2024-12-19T16:03:00.046275Z | Debug | VFS: opening file:///home/enrico/deleteme/app/Main.hs
2024-12-19T16:03:00.047323Z | Debug | Finished build session
AsyncCancelled
2024-12-19T16:03:00.047404Z | Debug | Set files of interst to
    [(/home/enrico/deleteme/app/Main.hs, Modified {firstOpen = True})]
2024-12-19T16:03:00.047733Z | Debug | Restarting build session due to /home/enrico/deleteme/app/Main.hs (modified)
Action Queue: []
Keys: [ GetClientSettings; 
      , GetModificationTime; /home/enrico/deleteme/app/Main.hs
      , IsFileOfInterest; /home/enrico/deleteme/app/Main.hs ]
Aborting previous build session took 0.00s 
2024-12-19T16:03:00.047946Z | Debug | Opened text document: file:///home/enrico/deleteme/app/Main.hs
2024-12-19T16:03:00.048673Z | Debug | hlint: Getting hlint ideas for  NormalizedFilePath "/home/enrico/deleteme/app/Main.hs"
2024-12-19T16:03:00.049613Z | Info | Cradle path: app/Main.hs
2024-12-19T16:03:00.049858Z | Warning | No [cradle](https://github.com/mpickering/hie-bios#hie-bios) found for app/Main.hs.
Proceeding with [implicit cradle](https://hackage.haskell.org/package/implicit-hie).
You should ignore this message, unless you see a 'Multi Cradle: No prefixes matched' error.
2024-12-19T16:03:00.052313Z | Debug | Cradle: Cradle{ cradleRootDir = "/home/enrico/deleteme", cradleOptsProg = CradleAction: Cabal}
2024-12-19T16:03:00.052524Z | Info | invoking build tool to determine build flags (this may take some time depending on the cache)
2024-12-19T16:03:00.052703Z | Debug | Requested to load Cabal cradle using single file mode
2024-12-19T16:03:00.083256Z | Debug | cabal --numeric-version
2024-12-19T16:03:00.181085Z | Debug | cabal exec -v0 -- ghc --print-libdir
2024-12-19T16:03:00.387014Z | Debug | cabal exec -v0 -- ghc -package-env=- -ignore-dot-ghci -e Control.Monad.join (Control.Monad.fmap System.IO.putStr System.Environment.getExecutablePath)
2024-12-19T16:03:00.505294Z | Debug | cabal --builddir=/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d v2-exec --with-compiler /home/enrico/.cache/hie-bios/wrapper-b54f81dea4c0e6d1626911c526bc4e36 --with-hc-pkg /home/enrico/.cache/hie-bios/ghc-pkg-4dd077f01ab89a1f905d2fbf68335958 ghc -v0 -- --numeric-version
  Environment Variables
    HIE_BIOS_GHC: /home/enrico/.ghcup/ghc/9.8.2/lib/ghc-9.8.2/bin/ghc-9.8.2
    HIE_BIOS_GHC_ARGS: -B/home/enrico/.ghcup/ghc/9.8.2/lib/ghc-9.8.2/lib
2024-12-19T16:03:00.505665Z | Info | Load cabal cradle using single file
2024-12-19T16:03:00.637088Z | Debug | cabal exec -v0 -- ghc --print-libdir
2024-12-19T16:03:00.863638Z | Debug | cabal exec -v0 -- ghc -package-env=- -ignore-dot-ghci -e Control.Monad.join (Control.Monad.fmap System.IO.putStr System.Environment.getExecutablePath)
2024-12-19T16:03:00.865227Z | Info | cabal --builddir=/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d v2-repl --with-compiler /home/enrico/.cache/hie-bios/wrapper-b54f81dea4c0e6d1626911c526bc4e36 --with-hc-pkg /home/enrico/.cache/hie-bios/ghc-pkg-4dd077f01ab89a1f905d2fbf68335958 /home/enrico/deleteme/app/Main.hs
  Environment Variables
    HIE_BIOS_OUTPUT: /tmp/HIE_BIOS_OUTPUT778723-0
    HIE_BIOS_GHC: /home/enrico/.ghcup/ghc/9.8.2/lib/ghc-9.8.2/bin/ghc-9.8.2
    HIE_BIOS_GHC_ARGS: -B/home/enrico/.ghcup/ghc/9.8.2/lib/ghc-9.8.2/lib
2024-12-19T16:03:00.950556Z | Debug | Build profile: -w ghc-9.8.2 -O1
2024-12-19T16:03:00.951139Z | Debug | In order, the following will be built (use -v for more details):
2024-12-19T16:03:00.951334Z | Debug |  - deleteme-0.1.0.0 (interactive) (exe:deleteme) (first run)
2024-12-19T16:03:00.996675Z | Debug | Preprocessing executable 'deleteme' for deleteme-0.1.0.0...
2024-12-19T16:03:01.148927Z | Debug | cabal exec -v0 -- ghc --print-libdir
2024-12-19T16:03:01.379033Z | Debug | cabal exec -v0 -- ghc -package-env=- -ignore-dot-ghci -e Control.Monad.join (Control.Monad.fmap System.IO.putStr System.Environment.getExecutablePath)
2024-12-19T16:03:01.522133Z | Debug | cabal --builddir=/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d v2-exec --with-compiler /home/enrico/.cache/hie-bios/wrapper-b54f81dea4c0e6d1626911c526bc4e36 --with-hc-pkg /home/enrico/.cache/hie-bios/ghc-pkg-4dd077f01ab89a1f905d2fbf68335958 ghc -v0 -- --print-libdir
  Environment Variables
    HIE_BIOS_GHC: /home/enrico/.ghcup/ghc/9.8.2/lib/ghc-9.8.2/bin/ghc-9.8.2
    HIE_BIOS_GHC_ARGS: -B/home/enrico/.ghcup/ghc/9.8.2/lib/ghc-9.8.2/lib
2024-12-19T16:03:01.655450Z | Debug | cabal exec -v0 -- ghc --print-libdir
2024-12-19T16:03:01.880311Z | Debug | cabal exec -v0 -- ghc -package-env=- -ignore-dot-ghci -e Control.Monad.join (Control.Monad.fmap System.IO.putStr System.Environment.getExecutablePath)
2024-12-19T16:03:02.007988Z | Debug | cabal --builddir=/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d v2-exec --with-compiler /home/enrico/.cache/hie-bios/wrapper-b54f81dea4c0e6d1626911c526bc4e36 --with-hc-pkg /home/enrico/.cache/hie-bios/ghc-pkg-4dd077f01ab89a1f905d2fbf68335958 ghc -v0 -- --numeric-version
  Environment Variables
    HIE_BIOS_GHC: /home/enrico/.ghcup/ghc/9.8.2/lib/ghc-9.8.2/bin/ghc-9.8.2
    HIE_BIOS_GHC_ARGS: -B/home/enrico/.ghcup/ghc/9.8.2/lib/ghc-9.8.2/lib
2024-12-19T16:03:02.008762Z | Debug | Session loading result: Right (ComponentOptions {componentOptions = ["-fbuilding-cabal-package","-O0","-outputdir","/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d/build/x86_64-linux/ghc-9.8.2/deleteme-0.1.0.0/x/deleteme/build/deleteme/deleteme-tmp","-odir","/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d/build/x86_64-linux/ghc-9.8.2/deleteme-0.1.0.0/x/deleteme/build/deleteme/deleteme-tmp","-hidir","/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d/build/x86_64-linux/ghc-9.8.2/deleteme-0.1.0.0/x/deleteme/build/deleteme/deleteme-tmp","-hiedir","/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d/build/x86_64-linux/ghc-9.8.2/deleteme-0.1.0.0/x/deleteme/build/deleteme/deleteme-tmp/extra-compilation-artifacts/hie","-stubdir","/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d/build/x86_64-linux/ghc-9.8.2/deleteme-0.1.0.0/x/deleteme/build/deleteme/deleteme-tmp","-i","-iapp","-i/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d/build/x86_64-linux/ghc-9.8.2/deleteme-0.1.0.0/x/deleteme/build/deleteme/deleteme-tmp","-i/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d/build/x86_64-linux/ghc-9.8.2/deleteme-0.1.0.0/x/deleteme/build/deleteme/autogen","-i/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d/build/x86_64-linux/ghc-9.8.2/deleteme-0.1.0.0/x/deleteme/build/global-autogen","-I/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d/build/x86_64-linux/ghc-9.8.2/deleteme-0.1.0.0/x/deleteme/build/deleteme/autogen","-I/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d/build/x86_64-linux/ghc-9.8.2/deleteme-0.1.0.0/x/deleteme/build/global-autogen","-I/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d/build/x86_64-linux/ghc-9.8.2/deleteme-0.1.0.0/x/deleteme/build/deleteme/deleteme-tmp","-optP-include","-optP/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d/build/x86_64-linux/ghc-9.8.2/deleteme-0.1.0.0/x/deleteme/build/deleteme/autogen/cabal_macros.h","-this-unit-id","deleteme-0.1.0.0-inplace-deleteme","-hide-all-packages","-Wmissing-home-modules","-no-user-package-db","-package-db","/home/enrico/.cabal/store/ghc-9.8.2-32bd/package.db","-package-db","/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d/packagedb/ghc-9.8.2","-package-db","/home/enrico/.cache/hie-bios/dist-deleteme-2ffc2a9ada40f7066b50bcbb85df6a6d/build/x86_64-linux/ghc-9.8.2/deleteme-0.1.0.0/x/deleteme/package.conf.inplace","-package-id","base-4.19.1.0-9254","-XHaskell2010","app/Main.hs","-Wall","-hide-all-packages"], componentRoot = "/home/enrico/deleteme", componentDependencies = ["deleteme.cabal","cabal.project","cabal.project.local"]},"/home/enrico/.ghcup/ghc/9.8.2/lib/ghc-9.8.2/lib","9.8.2")
2024-12-19T16:03:02.020281Z | Info | Interface files cache directory: /home/enrico/.cache/ghcide/deleteme-0.1.0.0-inplace-deleteme-c38452dbce672bbfc236ac73975e156b42d15720
2024-12-19T16:03:02.026159Z | Info | Making new HscEnv. In-place unit ids: [deleteme-0.1.0.0-inplace-deleteme]
2024-12-19T16:03:02.043955Z | Debug | New component cache HscEnvEq: (([],Just HscEnvEq 4),fromList [("cabal.project",Nothing),("cabal.project.local",Nothing),("deleteme.cabal",Just 2024-12-18 05:42:51.5519241 UTC)])
2024-12-19T16:03:02.045181Z | Debug | Finished build session
AsyncCancelled
2024-12-19T16:03:02.045323Z | Debug | Known files updated:
  fromList [(TargetFile NormalizedFilePath "/home/enrico/deleteme/app/Main.hs",fromList ["/home/enrico/deleteme/app/Main.hs"])]
2024-12-19T16:03:02.045887Z | Debug | Restarting build session due to new component
Action Queue: []
Keys: [ IsFileOfInterest; /home/enrico/deleteme/app/Main.hs
      , GhcSessionIO; 
      , GetKnownTargets;  ]
Aborting previous build session took 0.00s 
2024-12-19T16:03:02.046677Z | Debug | hlint: Getting hlint ideas for  NormalizedFilePath "/home/enrico/deleteme/app/Main.hs"
2024-12-19T16:03:02.049684Z | Debug | hlint: Using extensions for  NormalizedFilePath "/home/enrico/deleteme/app/Main.hs": [ MonomorphismRestriction
                                                                                     , DeepSubsumption
                                                                                     , RelaxedPolyRec
                                                                                     , ForeignFunctionInterface
                                                                                     , ImplicitPrelude
                                                                                     , DoAndIfThenElse
                                                                                     , EmptyDataDecls
                                                                                     , PatternGuards
                                                                                     , DatatypeContexts
                                                                                     , TraditionalRecordSyntax
                                                                                     , StarIsType
                                                                                     , CUSKs
                                                                                     , FieldSelectors ]
2024-12-19T16:03:02.083820Z | Debug | Finished: InitialLoad Took: 0.04s
2024-12-19T16:03:16.612140Z | Debug | Finished: GhcideCodeActions.GetFileContents Took: 0.00s
2024-12-19T16:03:16.612303Z | Debug | Finished: Pragmas.GhcSession Took: 0.00s
2024-12-19T16:03:16.612638Z | Debug | Finished: GhcideCodeActions.GetFileContents Took: 0.00s
2024-12-19T16:03:16.612800Z | Debug | Finished: changeTypeSignature.GetParsedModule Took: 0.00s
2024-12-19T16:03:16.612804Z | Debug | Finished: retrie Took: 0.00s
2024-12-19T16:03:16.612837Z | Debug | Finished:  Took: 0.00s
2024-12-19T16:03:16.612841Z | Debug | Finished: GhcideCodeActions.GetParsedModuleWithComments Took: 0.00s
2024-12-19T16:03:16.612984Z | Debug | Finished: Pragmas.GetFileContents Took: 0.00s
2024-12-19T16:03:16.613048Z | Debug | Finished: GADT.GetParsedModuleWithComments Took: 0.00s
2024-12-19T16:03:16.613171Z | Debug | Finished: QualifyImportedNames.TypeCheck Took: 0.00s
2024-12-19T16:03:16.613256Z | Debug | Finished: Pragmas.GetParsedModule Took: 0.00s
2024-12-19T16:03:16.613460Z | Debug | Finished: splice.codeAction.GitHieAst Took: 0.00s
2024-12-19T16:03:16.613568Z | Debug | Finished: Pragmas.GhcSession Took: 0.00s
2024-12-19T16:03:16.613862Z | Debug | Finished: Pragmas.GetFileContents Took: 0.00s
2024-12-19T16:03:16.614123Z | Debug | Finished: Pragmas.GetParsedModule Took: 0.00s
2024-12-19T16:03:16.614188Z | Debug | Finished: GhcideCodeActions.GetGlobalBindingTypeSigs Took: 0.00s
2024-12-19T16:03:16.614275Z | Debug | Finished: GhcideCodeActions.GetAnnotatedParsedSource Took: 0.00s
2024-12-19T16:03:16.614400Z | Debug | overloaded-record-dot: Collected record selectors: []
2024-12-19T16:03:16.614440Z | Debug | Finished: ImportActions Took: 0.00s
2024-12-19T16:03:16.614639Z | Debug | Finished: alternateNumberFormat.CollectLiterals Took: 0.00s
2024-12-19T16:03:16.614758Z | Debug | Finished: alternateNumberFormat.GhcSession Took: 0.00s
2024-12-19T16:03:16.614828Z | Debug | Finished: alternateNumberFormat.GetFileContents Took: 0.00s
2024-12-19T16:03:16.614851Z | Debug | explicit-fields: Collected records with wildcards: []
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2024-12-19T16:03:22.067741Z | Warning | No plugin handles this "codeAction/resolve" request.
2024-12-19T16:03:59.716841Z | Info | Live bytes: 0.00MB Heap size: 0.00MB

[fendor]

Thanks! I am wondering whether this is related to #4451...
I still can't reproduce, so I guess this bug might be specific to vim and YCM.

[Aster89]

@fendor , would you mind helping understand what I should expect from HLS, in this case? I mean, how can I use it in a standalone way so that I can see what messages it sends to the IDE?

I mean, 2024-12-17T16:50:27.362922Z | Warning | No plugin handles this "codeAction/resolve" request. sounds a lot like YCM sends some request to HLS, and HLS doesn't find a plugin for it.

[fendor]

It looks like HLS supports codeAction/resolve, so vim always sends a codeAction/resolve request to HLS. However, not all plugins and not all CodeActions have an associated codeAction/resolve handler. For example, if the CodeAction is cheap, there is no reason to do the roundtrip to the server.
However, it looks like some clients added support for */resolve requests and unconditionally asks for codeAction/resolve. HLS rejects this request in some instances, perhaps this leads to vim not applying the codefix it already has around locally.

Presumably, you can tell your client to log the lsp messages. However, I am not sure how to do that with vim.

[fendor]

@Aster89 In #4478, I implemented a fallback handler for resolve requests. To my understanding, this should fix your issue, could you give it a try?

If you are using ghcup, then the following should work: ghcup compile hls -g enhance/plugins/handle-resolves --ghc <ghc-ver> and then make sure vim is using that binary.