For transformers, I needed: diff --git a/Control/Monad/Trans/Error.hs b/Control/Monad/Trans/Error.hs index 0158a8a..0dea478 100644 --- a/Control/Monad/Trans/Error.hs +++ b/Control/Monad/Trans/Error.hs @@ -57,6 +57,10 @@ instance MonadPlus IO where mzero = ioError (userError "mzero") m `mplus` n = m `catchIOError` \_ -> n +instance Alternative IO where + empty = mzero + (<|>) = mplus + #if !(MIN_VERSION_base(4,4,0)) -- exported by System.IO.Error from base-4.4 catchIOError :: IO a -> (IOError -> IO a) -> IO a For hpc, I needed: Build-Depends: - base >= 4.4.1 && < 4.8, + base >= 4.4.1 && < 4.9, containers >= 0.4.1 && < 0.6, directory >= 1.1 && < 1.3, - time >= 1.2 && < 1.5 + time >= 1.2 && < 1.6 For hoopl, I needed: - Build-Depends: base >= 4.3 && < 4.8 + Build-Depends: base >= 4.3 && < 4.9 For the latter two, I think this should be a perfectly acceptable point release. For transformers, we could also just ifdef the Alternative into the GHC sources. Edward Excerpts from Herbert Valerio Riedel's message of 2015-01-04 00:22:28 -0800:

Hello Edward,

On 2015-01-04 at 08:54:58 +0100, Edward Z. Yang wrote:

[...]

...

There are also some changes to hoopl, transformers and hpc (mostly because their bootstrap libraries.)

...what kind of changes specifically?

Once thing that needs to be considered is that we'd require to upstream changes to transformers (it's not under GHC HQ's direct control) for a transformers point(?) release ... and we'd need that as we can't release any source-tarball that contains libraries (which get installed into the pkg-db) that don't match their upstream version on Hackage.

Cheers, hvr