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T18240a.hs:11:11: error: [GHC-71492]
• Instance head cannot contain nested ‘forall’s or contexts
• In an instance declaration
T18240a.hs:12:15: error: [GHC-76037]
Not in scope: type variable ‘a’
T18240a.hs:14:11: error: [GHC-71492]
• Instance head cannot contain nested ‘forall’s or contexts
• In an instance declaration
T18240a.hs:17:11: error: [GHC-71492]
• Instance head cannot contain nested ‘forall’s or contexts
• In an instance declaration
T18240a.hs:18:22: error: [GHC-76037]
Not in scope: type variable ‘a’
T18240a.hs:20:21: error: [GHC-71492]
• Instance head cannot contain nested ‘forall’s or contexts
• In an instance declaration
T18240a.hs:21:24: error: [GHC-76037]
Not in scope: type variable ‘b’
T18240a.hs:23:19: error: [GHC-71492]
• Instance head cannot contain nested ‘forall’s or contexts
• In an instance declaration
T18240a.hs:28:10: error: [GHC-12222]
• Illegal head of an instance declaration: ‘42’
Instance heads must be of the form
C ty_1 ... ty_n
where ‘C’ is a class
• In an instance declaration
T18240a.hs:29:10: error: [GHC-12222]
• Illegal head of an instance declaration: ‘Int -> Int’
Instance heads must be of the form
C ty_1 ... ty_n
where ‘C’ is a class
• In an instance declaration
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