kakkun61
GHC Users Guide 見ると GHC 9.6.1 から -Wloopy-superclass-solve って警告が増えたみたいですけど、実際に使おうとすると:thinking_face:
https://downloads.haskell.org/ghc/latest/docs/users_guide/using-warnings.html#ghc-flag--Wloopy-superclass-solve
> cabal build
Resolving dependencies...
Build profile: -w ghc-9.6.1 -O1
In order, the following will be built (use -v for more details):
- haskell-project-template-0.1.0.0 (lib) (configuration changed)
- haskell-project-template-0.1.0.0 (exe:app) (configuration changed)
Configuring library for haskell-project-template-0.1.0.0..
Preprocessing library for haskell-project-template-0.1.0.0..
Building library for haskell-project-template-0.1.0.0..
on the commandline: error: [-Wunrecognised-warning-flags, Werror=unrecognised-warning-flags]
unrecognised warning flag: -Wloopy-superclass-solve
Error: cabal-3.10.1.0.exe: Failed to build haskell-project-template-0.1.0.0
(which is required by exe:app from haskell-project-template-0.1.0.0).https://downloads.haskell.org/ghc/latest/docs/users_guide/using-warnings.html#ghc-flag--Wloopy-superclass-solve