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<interactive>:4:1: error: [GHC-23894]
• Illegal generalised algebraic data declaration for ‘T’
• In the data declaration for ‘T’
Suggested fix: Perhaps you intended to use GADTs
<interactive>:4:16: [GHC-25709]
Data constructor ‘C’ has existential type variables, a context, or a specialised result type
C :: T Int
In the definition of data constructor ‘C’
In the data type declaration for ‘T’
Suggested fixes:
Perhaps you intended to use ExistentialQuantification
Perhaps you intended to use GADTs
ghci057.hs:4:3: error: [GHC-25709]
• Data constructor ‘C’ has existential type variables, a context, or a specialised result type
C :: T Int
• In the definition of data constructor ‘C’
In the data type declaration for ‘T’
Suggested fixes:
Perhaps you intended to use ExistentialQuantification
Perhaps you intended to use GADTs
ghci057.hs:4:3: error: [GHC-25709]
• Data constructor ‘C’ has existential type variables, a context, or a specialised result type
C :: T Int
• In the definition of data constructor ‘C’
In the data type declaration for ‘T’
Suggested fixes:
Perhaps you intended to use ExistentialQuantification
Perhaps you intended to use GADTs
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