Broken `cabal haddock --hoogle` with GHC 7.10

[Ben Gamari]

Michael Snoyman <michael at snoyman.com> writes:

> I'm not really able to follow the details of this, but I wanted to raise to
> everyone's attention a serious bug with the current GHC 7.10 RC, Cabal
> 1.22, and/or Haddock. Currently, running `cabal haddock --hoogle` does not
> work. There seem to be two different issues open about it:
>
> https://github.com/haskell/haddock/issues/361
> https://github.com/haskell/cabal/issues/2297
>
> I really don't understand the issues here, but I'd claim that the severity
> of this should probably be a blocker for a GHC 7.10 release.

There may be more to this issue that I am seeing at the moment but I
believe I have a fix here [1]. There's also a patch improving the error
handling in Haddock here [2].

Cheers,

- Ben


[1] https://github.com/haskell/cabal/pull/2439
[2] https://github.com/haskell/haddock/pull/369
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