multiple methods pattern bug(?)

Hi, the following instance declaration doesn't work any more with ghc-5.02.3, it worked before. newtype ST state a = ST { unST :: state - (a,state) } instance Monad (ST c) where return x = ST (\state - (x,state)) (m = f) = ST (\state - let (x,state1) = unST m state

RE: multiple methods pattern bug(?)

the following instance declaration doesn't work any more with ghc-5.02.3, it worked before. newtype ST state a = ST { unST :: state - (a,state) } instance Monad (ST c) where return x = ST (\state - (x,state)) (m = f) = ST (\state - let (x,state1) = unST m state