On 3 January 2015 at 15:05, Johan Tibell <johan.tib...@gmail.com> wrote:
> The error (https://travis-ci.org/haskell/cabal/jobs/45758614) is quite > perplexing: > > [62 of 77] Compiling Distribution.Client.Config ( > Distribution/Client/Config.hs, > dist/dist-sandbox-8940a882/build/cabal/cabal-tmp/Distribution/Client/Config.o > ) > Distribution/Client/Config.hs:56:12: > Module > ‘Distribution.Simple.Compiler’ > does not export > ‘DebugInfoLevel(..)’ > cabal: Error: some packages failed to install: > cabal-install-1.22.0.0 failed during the building phase. The exception was: > ExitFailure 1 > > Distribution.Simple.Compiler most definitely does export DebugInfoLevel, > otherwise it wouldn't compile with the other GHC versions. > > Does GHC do something special with Cabal nowadays when it's no longer tied > to GHC? > > Is it because the Cabal-1.22.0.0 bundled with ghc is now different to the Cabal-1.22.0.0 in github? I get the same error compiling the master branch cabal-install with ghc-7.10.0-20141222. I think one solution is to increase the version number of Cabal in github (for 1.22 and master branches), and to make the latest cabal-install depend on this (i.e. Cabal>=1.22.0.1) since cabal-install 1.22 in github no longer works with the 'released' snapshot Cabal-1.22.0.0 in ghc. This fixes the error for ghc-7.10.0-20141222.
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