No instance for (Bifoldable Tagged)

[Thomas Miedema]

Trying to compile semigroupoids-5.1 with GHC HEAD (ghc-8.1.20160720), I get:

src/Data/Semigroup/Foldable/Class.hs:99:10: error:
    • No instance for (Bifoldable Tagged)
        arising from the superclasses of an instance declaration
    • In the instance declaration for ‘Bifoldable1 Tagged’

I have bifunctors-5.4.1 and tagged-0.8.4 installed (latest versions from Hackage).

ekmett/bifunctors#49 is related.

[Ryan Scott]

Ack, sorry for dropping the ball on that. I've uploaded tagged-0.8.5 to Hackage, which should resolve this particular issue.

[Thomas Miedema]

Thanks. It works.