GHC 7.6.1 ships with a buggy Cabal

[td123]

Using ghc 7.6.1

$ rm -rf ~/.cabal # To force a new default config being written $ cabal update # To write default config Config file path source is default config file. Config file /home/bardur/.cabal/config not found. Writing default configuration to /home/bardur/.cabal/config Downloading the latest package list from hackage.haskell.org $ cabal install foo cabal: Command.optionToFieldDescr: feature not implemented

related bug report:  https://bugs.archlinux.org/task/31864

Although this particular bug doesn't seem to be severe since once you remove the incorrect jobs line in the .cabal/config file it starts working again, it is quite annoying.

[tibbe]

Thanks for the report!

This will be worked around in the next cabal-install bugfix release ( https://github.com/haskell/cabal/commit/aa7d98f72f4a06ab2ab12defd046a21872a718d8). You can also try to upgrade to the latest Cabal bugfix release (1.16.0.1). Unfortunately there's nothing we can do about the Cabal that ships with 7.6.1. If there's a 7.6.2 we could ship with the fixed Cabal.

I'm closing this as the bug is fixed upstream.