I believe this is a known bug: #11197 (https://gitlab.haskell.org/ghc/ghc/issues/11197)

If you reported this again, could you please update your post to point to #11197? Thanks for reporting, regardless!

Richard

On Apr 17, 2019, at 6:20 PM, Artem Pelenitsyn <a.pelenitsyn@gmail.com> wrote:

I checked the release prior to 8.0.1 — 7.10.3, and it worked as expected (returned `True`). This looks like a bug introduced somewhere in between. I wish I could do git bisect on GHC properly…

Worth reporting, I guess.

--
Best, Artem

On Wed, 17 Apr 2019 at 16:26, Tom Ellis <tom-lists-haskell-cafe-2017@jaguarpaw.co.uk> wrote:
On Wed, Apr 17, 2019 at 04:17:17PM -0400, Bill Hallahan wrote:
> However, with GHC 8.2.2, I get an error when trying to do this:
[...]
> Prelude> let foo = (True, 'a' && False)
[...]
> Prelude> fst foo
> *** Exception: <interactive>:1:18: error:
>     • Couldn't match expected type ‘Bool’ with actual type ‘Char’

FWIW I see this behaviour in GHC 8.0.1 too.
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