"Add ... to the import list of ..." Code Action ignores `MagicHash`ed identifiers

[konn]

Code Action Add ... to the import list of ... won't appear, if the missing symbol is suffixed with # with MagicHash extension enabled.

Your environment

Output of haskell-language-server --probe-tools or haskell-language-server-wrapper --probe-tools:

$ ~/Library/Application\ Support/Code/User/globalStorage/haskell.haskell/haskell-language-server-wrapper-0.6.0-darwin 
Found "/Users/hiromi/Documents/Programming/Haskell/git/iapplicative-builder/hie.yaml" for "/Users/hiromi/Documents/Programming/Haskell/git/iapplicative-builder/a"
Module "/Users/hiromi/Documents/Programming/Haskell/git/iapplicative-builder/a" is loaded by Cradle: Cradle {cradleRootDir = "/Users/hiromi/Documents/Programming/Haskell/git/iapplicative-builder", cradleOptsProg = CradleAction: Stack}
Run entered for haskell-language-server-wrapper(haskell-language-server-wrapper-0.6.0-darwin) Version 0.6.0.0, Git revision 372a12e797069dc3ac4fa33dcaabe3b992999d7c (dirty) x86_64 ghc-8.10.1
Current directory: /Users/hiromi/Documents/Programming/Haskell/git/iapplicative-builder
Operating system: darwin
Arguments: []
Cradle directory: /Users/hiromi/Documents/Programming/Haskell/git/iapplicative-builder
Cradle type: Stack

Tool versions found on the $PATH
cabal:          3.2.0.0
stack:          2.5.1
ghc:            8.6.5


Consulting the cradle to get project GHC version...
Project GHC version: 8.8.4
haskell-language-server exe candidates: ["haskell-language-server-8.8.4","haskell-language-server-8.8","haskell-language-server"]

Which lsp-client do you use: VSCode

Describe your project (alternative: link to the project): irrelevant to the particular project structure

Contents of hie.yaml: a single file suffices and no cradle file needed.

Steps to reproduce

1. Save the following as Main.hs (or whatever):

   {-# LANGUAGE MagicHash #-}
   module Main where
   import GHC.Exts (Proxy#)
   
   theVal :: Proxy# Int
   theVal = proxy#

2. HLS (correctly) highlights proxy#, which is undefined symbol so far.

3. Open the code actions for proxy#.

Expected behaviour

HLS should suggest Add proxy# to the import list of GHC.Exts

Actual behaviour

Even though HLS detects definition site of proxy# correctly, it lacks Add to the import list!

Include debug information

Execute in the root of your project the command haskell-language-server --debug . and paste the logs here:

Debug output:

$ ~/Library/Application\ Support/Code/User/globalStorage/haskell.haskell/haskell-language-server-0.6.0-darwin-8.6.5 --debug tmp.hs  
haskell-language-server version: 0.6.0.0 (GHC: 8.6.5) (PATH: /Users/hiromi/Library/Application Support/Code/User/globalStorage/haskell.haskell/haskell-language-server-0.6.0-darwin-8.6.5) (GIT hash: 372a12e797069dc3ac4fa33dcaabe3b992999d7c)
(haskell-language-server)Ghcide setup tester in /Users/hiromi.
Report bugs at https://github.com/haskell/haskell-language-server/issues

Tool versions found on the $PATH
cabal:          3.2.0.0
stack:          2.5.1
ghc:            8.6.5


Step 1/4: Finding files to test in /Users/hiromi
Found 1 files

Step 2/4: Looking for hie.yaml files that control setup
Found 1 cradle

Step 3/4: Initializing the IDE

Step 4/4: Type checking the files
[INFO] Consulting the cradle for "tmp.hs"
NotShowMessage (NotificationMessage {_jsonrpc = "2.0", _method = WindowShowMessage, _params = ShowMessageParams {_xtype = MtInfo, _message = "No [cradle](https://github.com/mpickering/hie-bios#hie-bios) found for tmp.hs.\n Proceeding with [implicit cradle](https://hackage.haskell.org/package/implicit-hie).\nYou should ignore this message, unless you see a 'Multi Cradle: No prefixes matched' error."}})
Output from setting up the cradle Cradle {cradleRootDir = "/Users/hiromi", cradleOptsProg = CradleAction: Default}
[INFO] Using interface files cache dir: /Users/hiromi/.cache/ghcide/main-da39a3ee5e6b4b0d3255bfef95601890afd80709
[INFO] Making new HscEnv[main]
File:     /Users/hiromi/tmp.hs
Hidden:   no
Range:    8:10-8:16
Source:   typecheck
Severity: DsError
Message: 
  • Variable not in scope: proxy# :: Proxy# Int
  • Perhaps you want to add ‘proxy#’ to the import list
  in the import of ‘GHC.Exts’ (/Users/hiromi/tmp.hs:5:1-24).

Completed (1 file worked, 0 files failed)

Paste the logs from the lsp-client, e.g. for VS Code

LSP logs:

[client] run command: "/Users/hiromi/Library/Application Support/Code/User/globalStorage/haskell.haskell/haskell-language-server-0.6.0-darwin-8.6.5 --lsp"
[client] debug command: "/Users/hiromi/Library/Application Support/Code/User/globalStorage/haskell.haskell/haskell-language-server-0.6.0-darwin-8.6.5 --lsp"
[client] server cwd: /Users/hiromi
haskell-language-server version: 0.6.0.0 (GHC: 8.6.5) (PATH: /Users/hiromi/Library/Application Support/Code/User/globalStorage/haskell.haskell/haskell-language-server-0.6.0-darwin-8.6.5) (GIT hash: 372a12e797069dc3ac4fa33dcaabe3b992999d7c)
Starting (haskell-language-server)LSP server...
  with arguments: LspArguments {argLSP = True, argsCwd = Nothing, argFiles = [], argsShakeProfiling = Nothing, argsTesting = False, argsExamplePlugin = False, argsDebugOn = False, argsLogFile = Nothing, argsThreads = 0, argsProjectGhcVersion = False}
  with plugins: [PluginId "brittany",PluginId "eval",PluginId "floskell",PluginId "fourmolu",PluginId "ghcide",PluginId "hlint",PluginId "importLens",PluginId "moduleName",PluginId "ormolu",PluginId "pragmas",PluginId "retrie",PluginId "stylish-haskell",PluginId "tactic"]
  in directory: /Users/hiromi
If you are seeing this in a terminal, you probably should have run ghcide WITHOUT the --lsp option!
 Started LSP server in 0.00s
2020-12-09 20:28:09.60771 [ThreadId 25] - Registering ide configuration: IdeConfiguration {workspaceFolders = fromList [], clientSettings = hashed Nothing}
2020-12-09 20:28:09.609568 [ThreadId 25] - Configuration changed: Object (fromList [("haskell",Object (fromList [("hlint",Object (fromList [("logLevel",String "info"),("executablePath",String "/Users/hiromi/.local/bin/hlint")])),("logFile",String ""),("updateBehavior",String "keep-up-to-date"),("hlintOn",Bool True),("formatOnImportOn",Bool True),("indentationRules",Object (fromList [("enabled",Bool True)])),("liquidOn",Bool False),("languageServerVariant",String "haskell-language-server"),("serverExecutablePath",String ""),("diagnosticsOnChange",Bool True),("completionSnippetsOn",Bool True),("maxNumberOfProblems",Number 100.0),("formattingProvider",String "fourmolu"),("trace",Object (fromList [("server",String "off")]))]))])
2020-12-09 20:28:09.610792 [ThreadId 25] - Opened text document: file:///Users/hiromi/tmp.hs
2020-12-09 20:28:09.612351 [ThreadId 115] - getClientConfigAction:clientSettings:Just (Object (fromList [("haskell",Object (fromList [("hlint",Object (fromList [("logLevel",String "info"),("executablePath",String "/Users/hiromi/.local/bin/hlint")])),("logFile",String ""),("updateBehavior",String "keep-up-to-date"),("hlintOn",Bool True),("formatOnImportOn",Bool True),("indentationRules",Object (fromList [("enabled",Bool True)])),("liquidOn",Bool False),("languageServerVariant",String "haskell-language-server"),("serverExecutablePath",String ""),("diagnosticsOnChange",Bool True),("completionSnippetsOn",Bool True),("maxNumberOfProblems",Number 100.0),("formattingProvider",String "fourmolu"),("trace",Object (fromList [("server",String "off")]))]))]))
2020-12-09 20:28:09.612596 [ThreadId 115] - hlint:getIdeas:file:NormalizedFilePath "/Users/hiromi/tmp.hs"
2020-12-09 20:28:09.613512 [ThreadId 122] - Consulting the cradle for "tmp.hs"
Output from setting up the cradle Cradle {cradleRootDir = "/Users/hiromi", cradleOptsProg = CradleAction: Default}
2020-12-09 20:28:09.816025 [ThreadId 122] - Using interface files cache dir: /Users/hiromi/.cache/ghcide/main-da39a3ee5e6b4b0d3255bfef95601890afd80709
2020-12-09 20:28:09.816178 [ThreadId 122] - Making new HscEnv[main]
2020-12-09 20:28:09.830523 [ThreadId 185] - getClientConfigAction:clientSettings:Just (Object (fromList [("haskell",Object (fromList [("hlint",Object (fromList [("logLevel",String "info"),("executablePath",String "/Users/hiromi/.local/bin/hlint")])),("logFile",String ""),("updateBehavior",String "keep-up-to-date"),("hlintOn",Bool True),("formatOnImportOn",Bool True),("indentationRules",Object (fromList [("enabled",Bool True)])),("liquidOn",Bool False),("languageServerVariant",String "haskell-language-server"),("serverExecutablePath",String ""),("diagnosticsOnChange",Bool True),("completionSnippetsOn",Bool True),("maxNumberOfProblems",Number 100.0),("formattingProvider",String "fourmolu"),("trace",Object (fromList [("server",String "off")]))]))]))
2020-12-09 20:28:09.83073 [ThreadId 185] - hlint:getIdeas:file:NormalizedFilePath "/Users/hiromi/tmp.hs"
2020-12-09 20:28:09.86826 [ThreadId 251] - Plugin.makeCodeLens (ideLogger)
2020-12-09 20:28:09.868595 [ThreadId 253] - finish: codeLens (took 0.00s)
2020-12-09 20:28:09.869147 [ThreadId 258] - finish:  (took 0.00s)
2020-12-09 20:28:09.869455 [ThreadId 259] - finish: ModuleName.ghcSession (took 0.00s)
2020-12-09 20:28:09.869755 [ThreadId 261] - finish: ModuleName.GetParsedModule (took 0.00s)
2020-12-09 20:28:10.103483 [ThreadId 265] - hlint:getIdeas:setExtensions:[Cpp,OverlappingInstances,UndecidableInstances,IncoherentInstances,UndecidableSuperClasses,MonomorphismRestriction,MonoPatBinds,MonoLocalBinds,RelaxedPolyRec,ExtendedDefaultRules,ForeignFunctionInterface,UnliftedFFITypes,InterruptibleFFI,CApiFFI,GHCForeignImportPrim,JavaScriptFFI,ParallelArrays,TemplateHaskell,TemplateHaskellQuotes,ImplicitParams,ImplicitPrelude,ScopedTypeVariables,AllowAmbiguousTypes,UnliftedNewtypes,BangPatterns,TypeFamilies,TypeFamilyDependencies,TypeInType,OverloadedStrings,OverloadedLists,NumDecimals,DisambiguateRecordFields,RecordWildCards,RecordPuns,ViewPatterns,GADTs,GADTSyntax,NPlusKPatterns,DoAndIfThenElse,BlockArguments,RebindableSyntax,ConstraintKinds,PolyKinds,DataKinds,InstanceSigs,ApplicativeDo,StandaloneDeriving,DeriveDataTypeable,AutoDeriveTypeable,DeriveFunctor,DeriveTraversable,DeriveFoldable,DeriveGeneric,DefaultSignatures,DeriveAnyClass,DeriveLift,DerivingStrategies,DerivingVia,TypeSynonymInstances,FlexibleContexts,FlexibleInstances,ConstrainedClassMethods,MultiParamTypeClasses,NullaryTypeClasses,FunctionalDependencies,UnicodeSyntax,ExistentialQuantification,MagicHash,EmptyDataDecls,KindSignatures,RoleAnnotations,ParallelListComp,MonadComprehensions,GeneralizedNewtypeDeriving,PostfixOperators,TupleSections,PatternGuards,LiberalTypeSynonyms,RankNTypes,ImpredicativeTypes,TypeOperators,ExplicitNamespaces,PackageImports,ExplicitForAll,AlternativeLayoutRuleTransitional,DatatypeContexts,NondecreasingIndentation,RelaxedLayout,TraditionalRecordSyntax,LambdaCase,MultiWayIf,BinaryLiterals,HexFloatLiterals,DuplicateRecordFields,OverloadedLabels,EmptyCase,PatternSynonyms,PartialTypeSignatures,NamedWildCards,TypeApplications,Strict,StrictData,MonadFailDesugaring,EmptyDataDeriving,NumericUnderscores,QuantifiedConstraints,ImportQualifiedPost,CUSKs,StandaloneKindSignatures,StarIsType]
2020-12-09 20:28:10.581973 [ThreadId 269] - DocumentHighlight request at position 8:13 in file: /Users/hiromi/tmp.hs
2020-12-09 20:28:10.856607 [ThreadId 276] - finish: CodeAction (took 0.00s)
2020-12-09 20:28:12.220597 [ThreadId 285] - finish: CodeAction (took 0.00s)
2020-12-09 20:28:12.980925 [ThreadId 291] - finish: CodeAction:PackageExports (took 2.12s)

[berberman]

I think haskell/ghcide#916 also fixed this. Wait for the release :)

[konn]

Great, thanks!