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FailDueToGivenOverlapping.hs:27:9: error: [GHC-43085]
• Overlapping instances for E [a0] arising from a use of ‘eop’
Matching givens (or their superclasses):
E [Int]
bound by the type signature for:
bar :: E [Int] => () -> ()
at FailDueToGivenOverlapping.hs:26:1-26
Matching instance:
instance E [a] -- Defined at FailDueToGivenOverlapping.hs:21:10
(The choice depends on the instantiation of ‘a0’)
• In the expression: eop [undefined]
In an equation for ‘bar’: bar _ = eop [undefined]
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