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tcfail080.hs:27:1:
Could not deduce (Collection c0 a)
arising from the ambiguity check for ‛q’
from the context (Collection c a)
bound by the inferred type for ‛q’: Collection c a => a -> Bool
at tcfail080.hs:27:1-27
The type variable ‛c0’ is ambiguous
When checking that ‛q’
has the inferred type ‛forall (c :: * -> *) a.
Collection c a =>
a -> Bool’
Probable cause: the inferred type is ambiguous
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