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Last active November 21, 2016 23:28
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GHC 8 internal error building darcsden
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gistfile1.txt
$ darcs get hub.darcs.net:simon/darcsden-ghc8
$ cd darcsden-ghc8
$ stack --stack-yaml=stack-ghc8.yaml build
gives:
While building <http://hub.darcs.net/simon/darcsden/browse/src/DarcsDen/Backend/Transient.hs> with GHC 8:
[12 of 56] Compiling DarcsDen.Backend.Transient ( src/DarcsDen/Backend/Transient.hs, .stack-work/dist/i386-linux/Cabal-1.24.0.0/build/DarcsDen/Backend/Transient.o )
/home/simon/src/darcsden/src/DarcsDen/Backend/Transient.hs:10:33: error:
• GHC internal error: ‘BackendTransientM’ is not in scope during type checking, but it passed the renamer
tcl_env of environment: [ajE2 :-> Type variable ‘bt’ = bt]
• In the first argument of ‘MonadIO’, namely ‘BackendTransientM bt’
In the type ‘(BT bt, MonadIO (BackendTransientM bt))’
In the type declaration for ‘BTIO’
/home/simon/src/darcsden/src/DarcsDen/Backend/Transient.hs:44:1: error:
• Non type-variable argument
in the constraint: Functor (BackendTransientM bt)
(Use FlexibleContexts to permit this)
• In the context: (Functor (BackendTransientM bt),
Monad (BackendTransientM bt))
While checking the super-classes of class ‘BackendTransient’
In the class declaration for ‘BackendTransient’
-- While building package darcsden-1.1.99 using:
/home/simon/.stack/setup-exe-cache/i386-linux/setup-Simple-Cabal-1.24.0.0-ghc-8.0.1 --builddir=.stack-work/dist/i386-linux/Cabal-1.24.0.0 build lib:darcsden exe:darcsden exe:darcsden-post-hook exe:da$
Process exited with code: ExitFailure 1
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