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T18648.hs:6:4: error:
• Illegal argument ‘f a’ in:
‘type Bar1 (f a) = ...’
The arguments to ‘Bar1’ must all be distinct type variables
• In the default type instance declaration for ‘Bar1’
In the class declaration for ‘Foo1’
T18648.hs:10:4: error:
• Illegal argument ‘Bar2 a’ in:
‘type Bar2 (Bar2 a) = ...’
The arguments to ‘Bar2’ must all be distinct type variables
• In the default type instance declaration for ‘Bar2’
In the class declaration for ‘Foo2’
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