GHC 7.10 regression when using foldr

[Bryan O'Sullivan]

On Tue, Jan 20, 2015 at 3:02 PM, Herbert Valerio Riedel <hvr at gnu.org> wrote:

> I'm a bit confused, several past attoparsec versions seem to build just
> fine with GHC 7.10:
>
>   https://ghc.haskell.org/~hvr/buildreports/attoparsec.html
>
> were there hidden breakages not resulting in compile errors?
> Or are the fixes you mention about restoring -Wall hygiene?
>

I build with -Wall -Werror, and also have to maintain the test and
benchmark suites.
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