PartialTypeSignaturesDisabled.hs:4:8:
    Found hole ‘_’ with type: Bool
    To use the inferred type, enable PartialTypeSignatures
    In the type signature for ‘foo’: _ -> _

PartialTypeSignaturesDisabled.hs:4:13:
    Found hole ‘_’ with type: Bool
    To use the inferred type, enable PartialTypeSignatures
    In the type signature for ‘foo’: _ -> _