>But the situation is strange, because it seems like the instance was >removed in 2022: > >https://gitlab.haskell.org/ghc/ghc/-/commit/85b0f87a298c8e54b06a8f8c6ce88669c5cad3bc#f7c61f967f2b5c4951224837ae809183449da146_116_105 > >So I don't understand why it still seems to exist in base-4.20.0.1: That patch only landed in April 2024