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vimus / libmpd-haskell

A client library for MPD, the Music Player Daemon
MIT License
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GHC 8.6.1 support #106

Closed andrzejressel closed 5 years ago

andrzejressel commented 5 years ago

Master branch doesn't build on ghc 8.6.1 (tested with stack on resolver nightly-2018-10-04):

/XXX/libmpd-haskell/src/Network/MPD/Core.hs:120:13: error:
    • No instance for (Control.Monad.Fail.MonadFail MPD)
        arising from a do statement
        with the failable pattern ‘[msg]’
    • In a stmt of a 'do' block: [msg] <- send ""
      In the expression:    
        do [msg] <- send "" 
           if "OK MPD" `isPrefixOf` msg then
               MPD $ checkVersion $ parseVersion msg
           else             
               return False 
      In an equation for ‘checkConn’:
          checkConn         
            = do [msg] <- send ""
                 if "OK MPD" `isPrefixOf` msg then
                     MPD $ checkVersion $ parseVersion msg
                 else       
                     return False
    |                       
120 |             [msg] <- send ""
    |