src/Data/Functor/Of.hs:81:3: warning: [-Wnoncanonical-monad-instances]
Noncanonical ‘(>>)’ definition detected
in the instance declaration for ‘Monad (Of a)’.
‘(>>)’ will eventually be removed in favour of ‘(*>)’
Either remove definition for ‘(>>)’ (recommended) or define as ‘(>>) = (*>)’
See also: https://gitlab.haskell.org/ghc/ghc/-/wikis/proposal/monad-of-no-return
|
81 | (m :> _) >> (m' :> y) = mappend m m' :> y
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[2 of 4] Compiling Streaming.Internal ( src/Streaming/Internal.hs, dist/build/Streaming/Internal.o, dist/build/Streaming/Internal.dyn_o )
src/Streaming/Internal.hs:209:10: error: [GHC-39999]
• Could not deduce ‘Show (f (Stream f m a))’
arising from the head of a quantified constraint
arising from the superclasses of an instance declaration
from the context: (Monad m, Functor f, Show (m ShowSWrapper),
Show (f ShowSWrapper))
bound by the instance declaration
at src/Streaming/Internal.hs:(209,10)-(210,30)
or from: Show a
bound by a quantified context
at src/Streaming/Internal.hs:(209,10)-(210,30)
• In the instance declaration for ‘Show1 (Stream f m)’
|
209 | instance (Monad m, Functor f, Show (m ShowSWrapper), Show (f ShowSWrapper))
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^...
When building this with
ghc-9.6(as a dependency of another package) it fails with: