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tcfail027.hs:4:1: error:
• Superclass cycle for ‘A’
one of whose superclasses is ‘B’
one of whose superclasses is ‘A’
Use UndecidableSuperClasses to accept this
• In the class declaration for ‘A’
tcfail027.hs:7:1: error:
• Superclass cycle for ‘B’
one of whose superclasses is ‘A’
one of whose superclasses is ‘B’
Use UndecidableSuperClasses to accept this
• In the class declaration for ‘B’
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