Compilation fails with GHC 9.4.5

[gn0]

stylish-haskell 0.14.4.0 fails to compile with GHC 9.4.5. This breaks ghcup compile hls --version 2.0.0.0 --ghc 9.4.5.

The output of cabal install stylish-haskell:

$ cabal install stylish-haskell
Resolving dependencies...
Build profile: -w ghc-9.4.5 -O1
In order, the following will be built (use -v for more details):
 - prettyprinter-ansi-terminal-1.1.3 (lib) (requires build)
 - stylish-haskell-0.14.4.0 (lib) (requires build)
 - prettyprinter-compat-ansi-wl-pprint-1.0.2 (lib) (requires build)
 - ansi-wl-pprint-1.0.2 (lib) (requires build)
 - optparse-applicative-0.17.1.0 (lib) (requires build)
 - stylish-haskell-0.14.4.0 (exe:stylish-haskell) (requires build)
Starting     prettyprinter-ansi-terminal-1.1.3 (lib)
Starting     stylish-haskell-0.14.4.0 (lib)
Building     prettyprinter-ansi-terminal-1.1.3 (lib)
Building     stylish-haskell-0.14.4.0 (lib)
Installing   prettyprinter-ansi-terminal-1.1.3 (lib)
Completed    prettyprinter-ansi-terminal-1.1.3 (lib)

Failed to build stylish-haskell-0.14.4.0.
Build log (
/home/gn0/.cabal/logs/ghc-9.4.5/stylish-haskell-0.14.4.0-c11a98df49ff817c217b04dec4518f3e390517e33cbfef16f01b0095a8abbcd5.log
):
Configuring library for stylish-haskell-0.14.4.0..
Preprocessing library for stylish-haskell-0.14.4.0..
Building library for stylish-haskell-0.14.4.0..
[ 1 of 26] Compiling Language.Haskell.Stylish.Block ( lib/Language/Haskell/Stylish/Block.hs, dist/build/Language/Haskell/Stylish/Block.o, dist/build/Language/Haskell/Stylish/Block.dyn_o )
[ 2 of 26] Compiling Language.Haskell.Stylish.Config.Internal ( lib/Language/Haskell/Stylish/Config/Internal.hs, dist/build/Language/Haskell/Stylish/Config/Internal.o, dist/build/Language/Haskell/Stylish/Config/Internal.dyn_o )
[ 3 of 26] Compiling Language.Haskell.Stylish.Editor ( lib/Language/Haskell/Stylish/Editor.hs, dist/build/Language/Haskell/Stylish/Editor.o, dist/build/Language/Haskell/Stylish/Editor.dyn_o )
[ 4 of 26] Compiling Language.Haskell.Stylish.GHC ( lib/Language/Haskell/Stylish/GHC.hs, dist/build/Language/Haskell/Stylish/GHC.o, dist/build/Language/Haskell/Stylish/GHC.dyn_o )

lib/Language/Haskell/Stylish/GHC.hs:71:32: error:
    • Couldn't match expected type ‘GHC.Settings’
                  with actual type ‘ghc-lib-parser-9.4.5.20230430:GHC.Settings.Settings’
      NB: ‘GHC.Settings’
            is defined in ‘GHC.Settings’ in package ‘ghc-9.4.5’
          ‘ghc-lib-parser-9.4.5.20230430:GHC.Settings.Settings’
            is defined in ‘GHC.Settings’
                in package ‘ghc-lib-parser-9.4.5.20230430’
    • In the first argument of ‘defaultDynFlags’, namely
        ‘GHCEx.fakeSettings’
      In the expression:
        defaultDynFlags GHCEx.fakeSettings GHCEx.fakeLlvmConfig
      In an equation for ‘baseDynFlags’:
          baseDynFlags
            = defaultDynFlags GHCEx.fakeSettings GHCEx.fakeLlvmConfig
   |
71 | baseDynFlags = defaultDynFlags GHCEx.fakeSettings GHCEx.fakeLlvmConfig
   |                                ^^^^^^^^^^^^^^^^^^

lib/Language/Haskell/Stylish/GHC.hs:71:51: error:
    • Couldn't match expected type ‘GHC.LlvmConfig’
                  with actual type ‘ghc-lib-parser-9.4.5.20230430:GHC.Driver.Session.LlvmConfig’
      NB: ‘GHC.LlvmConfig’
            is defined in ‘GHC.Driver.Session’ in package ‘ghc-9.4.5’
          ‘ghc-lib-parser-9.4.5.20230430:GHC.Driver.Session.LlvmConfig’
            is defined in ‘GHC.Driver.Session’
                in package ‘ghc-lib-parser-9.4.5.20230430’
    • In the second argument of ‘defaultDynFlags’, namely
        ‘GHCEx.fakeLlvmConfig’
      In the expression:
        defaultDynFlags GHCEx.fakeSettings GHCEx.fakeLlvmConfig
      In an equation for ‘baseDynFlags’:
          baseDynFlags
            = defaultDynFlags GHCEx.fakeSettings GHCEx.fakeLlvmConfig
   |
71 | baseDynFlags = defaultDynFlags GHCEx.fakeSettings GHCEx.fakeLlvmConfig
   |                                                   ^^^^^^^^^^^^^^^^^^^^
[22 of 26] Compiling Language.Haskell.Stylish.Verbose ( lib/Language/Haskell/Stylish/Verbose.hs, dist/build/Language/Haskell/Stylish/Verbose.o, dist/build/Language/Haskell/Stylish/Verbose.dyn_o )
[23 of 26] Compiling Language.Haskell.Stylish.Config.Cabal ( lib/Language/Haskell/Stylish/Config/Cabal.hs, dist/build/Language/Haskell/Stylish/Config/Cabal.o, dist/build/Language/Haskell/Stylish/Config/Cabal.dyn_o )
[25 of 26] Compiling Paths_stylish_haskell ( dist/build/autogen/Paths_stylish_haskell.hs, dist/build/Paths_stylish_haskell.o, dist/build/Paths_stylish_haskell.dyn_o )
Error: cabal: Failed to build stylish-haskell-0.14.4.0 (which is required by
exe:stylish-haskell from stylish-haskell-0.14.4.0). See the build log above
for details.

[Lev135]

It seems you should add +ghc-lib flag to stylish-haskell. See #405 with the same error for GHC 9.2.3. This flag is defolted to be true by #445, but unfortunately new hackage version has not been provided yet #451.

[gn0]

Thanks, @Lev135! This solved the issue for me:

$ ghcup compile hls --version 2.0.0.0 --ghc 9.4.5 -- --constraint "stylish-haskell +ghc-lib"