[Haskell-cafe] Strange GHC messages?

[Liam O'Connor]

Hi all, I've got some strange GHC output that doesn't seem to be
affecting my program adversely but I thought I should post about it
cos it's disquieting


mkUsageInfo: internal name? r{tv aIR}
mkUsageInfo: internal name? s{tv aIS}


It seems to be complaining about this newtype declaration:


> newtype ThreadStateM r s v = ThreadState { unbox :: StateT s (ReaderT r IO) v }
>    deriving (Monad, Functor, MonadIO, MonadState s, MonadReader r)

(uses newtype deriving)

I'm not sure what the problem here is?

Cheers.
~Liam