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T14846.hs:38:8: error: [GHC-25897]
• Couldn't match type ‘ríki’ with ‘Hom riki’
Expected: ríki a a
Actual: Hom riki a a
‘ríki’ is a rigid type variable bound by
the type signature for:
i :: forall {k4} {k5} {cls2 :: k5 -> Constraint} (xx :: k4)
(a :: Struct cls2) (ríki :: Struct cls2 -> Struct cls2 -> *).
StructI xx a =>
ríki a a
at T14846.hs:38:8-48
• When checking that instance signature for ‘i’
is more general than its signature in the class
Instance sig: forall {k1} {k3} {cls :: k3 -> Constraint} (xx :: k1)
(a :: Struct cls).
StructI xx a =>
Hom riki a a
Class sig: forall {k1} {k2} {cls :: k2 -> Constraint} (xx :: k1)
(a :: Struct cls) (ríki :: Struct cls -> Struct cls -> *).
StructI xx a =>
ríki a a
In the instance declaration for ‘Category (Hom riki)’
T14846.hs:39:44: error: [GHC-25897]
• Couldn't match kind ‘k3’ with ‘Struct cls2’
Expected kind ‘Struct cls2 -> Constraint’,
but ‘cls’ has kind ‘k3 -> Constraint’
‘k3’ is a rigid type variable bound by
the instance declaration
at T14846.hs:37:10-65
• In the second argument of ‘Structured’, namely ‘cls’
In the first argument of ‘AStruct’, namely ‘(Structured a cls)’
In an expression type signature: AStruct (Structured a cls)
• Relevant bindings include
i :: Hom riki a a (bound at T14846.hs:39:3)
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