Missing Enum instance for IoSubSystem

[Tom Ellis]

On Wed, Dec 04, 2024 at 03:47:06PM +0530, Zubin Duggal wrote:
> > 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

Ah, that would explain it.  Is there a way of seeing in the repo the
commit from which a release was made?  I don't see any tags
corresponding to released versions (although I do see ghc-9.7-start,
ghc-9.9-start, etc.).

Tom