4 Dec
2024
4 Dec
'24
5:17 a.m.
But the situation is strange, because it seems like the instance was removed in 2022:
https://gitlab.haskell.org/ghc/ghc/-/commit/85b0f87a298c8e54b06a8f8c6ce88669...
So I don't understand why it still seems to exist in base-4.20.0.1:
That patch only landed in April 2024