you need to use the new versions of alex and happy

cabal update ; cabal install alex happy


On Fri, Mar 7, 2014 at 11:03 PM, wren ng thornton <winterkoninkje@gmail.com> wrote:
Hello,

In testing my packages for the impending GHC 7.8 release, I ran into
some issues with Alex-generated code. In particular, it looks like the
(>=#) and (==#)  operators now return Int# instead of Bool, so
expressions like

    if (offset >=# 0#) && (check ==# ord_c) then ...

no longer type check. Is this a known issue? Are there any plans to
fix it? I'd offer to submit a pull-request, but I'm not familiar with
the Alex codebase so that'd take a while

--
Live well,
~wren
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