I'm getting this error in ghci, and I think it should typecheck just fine.
Prelude> let fs = [(+2), (*4)]
Prelude> :t fs
fs :: [Integer -> Integer]
Prelude> :t sequence fs
<interactive>:1:0:
No instance for (Monad ((->) Integer))
arising from use of `sequence' at <interactive>:1:0-10
Possible fix:
add an instance declaration for (Monad ((->) Integer))
I'm using ghc-6.6-3 on Ubuntu edgy, installed as described on Pupeno's
web site (http://pupeno.com/2006/12/17/unstable-packages-on-ubuntu/)
Could something be installed incorrectly, or am I just misreading the type info?
Thanks,
Chad
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