hub.darcs.net :: ross -> transformers -> issue

flip101

When i compile with -Wmissed-specialisations actually indirectly by compiling with -Weverything i get the following warnings:

src/Main.hs: warning:        
    Could not specialise imported function ‘Control.Monad.Trans.Reader.$fApplicativeReaderT_$cliftA2’
      when specialising ‘Control.Monad.Trans.Reader.$fApplicativeReaderT’
      when specialising ‘Control.Monad.Trans.Reader.$fMonadReaderT_$cp1Monad’
      when specialising ‘Control.Monad.Trans.Reader.$fMonadReaderT’
      when specialising ‘Control.Monad.Reader.Class.$fMonadReaderrReaderT’
    Probable fix: add INLINABLE pragma on ‘Control.Monad.Trans.Reader.$fApplicativeReaderT_$cliftA2’

I think there is a missed optimization here. The inlinable pragma should be added in the module which export these functions.