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T7848.hs:6:57: error:
• Occurs check: cannot construct the infinite type:
t2 ~ r0 -> t -> t1 -> A -> A -> A -> A -> t2
• In the expression: y
In an equation for ‘x’:
x (+) ((&)@z) ((:&&) a b) (c :&& d) (e `A` f) (A g h)
= y
where
infixl 3 `y`
y _ = (&)
{-# INLINE (&) #-}
{-# SPECIALIZE (&) :: a #-}
(&) = x
• Relevant bindings include
y :: forall r. r -> t -> t1 -> A -> A -> A -> A -> t2
(bound at T7848.hs:8:9)
(&) :: t -> t1 -> A -> A -> A -> A -> t2 (bound at T7848.hs:11:9)
z :: t1 (bound at T7848.hs:6:12)
(&) :: t1 (bound at T7848.hs:6:8)
(+) :: t (bound at T7848.hs:6:3)
x :: t -> t1 -> A -> A -> A -> A -> t2 (bound at T7848.hs:6:1)
T7848.hs:10:9: error:
• Couldn't match expected type ‘t -> t1 -> A -> A -> A -> A -> t2’
with actual type ‘a’
‘a’ is a rigid type variable bound by
the type signature for:
(&) :: forall a. a
at T7848.hs:10:9
• In the SPECIALISE pragma {-# SPECIALIZE (&) :: a #-}
In an equation for ‘x’:
x (+) ((&)@z) ((:&&) a b) (c :&& d) (e `A` f) (A g h)
= y
where
infixl 3 `y`
y _ = (&)
{-# INLINE (&) #-}
{-# SPECIALIZE (&) :: a #-}
(&) = x
• Relevant bindings include
z :: t1 (bound at T7848.hs:6:12)
(&) :: t1 (bound at T7848.hs:6:8)
(+) :: t (bound at T7848.hs:6:3)
x :: t -> t1 -> A -> A -> A -> A -> t2 (bound at T7848.hs:6:1)
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