git-annex/ bugs/ Cabal dependency monadIO missing

Just issuing the command cabal install results in the following error message.

Command/Add.hs:54:3:
    No instance for (Control.Monad.IO.Control.MonadControlIO
                       (Control.Monad.State.Lazy.StateT Annex.AnnexState IO))
      arising from a use of `handle' at Command/Add.hs:54:3-24

Adding the dependency for monadIO to git-annex.cabal should fix this?
-- Thomas

No, it's already satisfied by monad-control being listed as a dependency in the cabal file. Your system might be old/new/or broken, perhaps it's time to provide some details about the version of haskell and of monad-control you have installed? --Joey

comment 1

I use Debian Squeeze, I have the Debian package cabal-install 0.8.0-1 installed.

$ git clone git://git-annex.branchable.com/
$ cd git-annex.branchable.com
$ cabal update
$ cabal install cabal-install

This installed: Cabal-1.10.2.0, zlib-0.5.3.1, cabal-install 0.10.2. No version of monad-control or monadIO installed.

$ ~/.cabal/bin/cabal install
Registering QuickCheck-2.4.1.1...
Registering Crypto-4.2.3...
Registering base-unicode-symbols-0.2.2.1...
Registering deepseq-1.1.0.2...
Registering hxt-charproperties-9.1.0...
Registering hxt-regex-xmlschema-9.0.0...
Registering hxt-unicode-9.0.1...
Registering hxt-9.1.2...
Registering stm-2.2.0.1...
Registering hS3-0.5.6...
Registering transformers-0.2.2.0...
Registering monad-control-0.2.0.1...
[1 of 1] Compiling Main             ( Setup.hs, dist/setup/Main.o )
Linking ./dist/setup/setup ...
ghc -O2 -Wall -ignore-package monads-fd -fspec-constr-count=5 --make configure
[1 of 2] Compiling TestConfig       ( TestConfig.hs, TestConfig.o )
[2 of 2] Compiling Main             ( configure.hs, configure.o )
Linking configure ...
./configure
  checking version... 3.20110720
  checking cp -a... yes
  checking cp -p... yes
  checking cp --reflink=auto... yes
  checking uuid generator... uuid
  checking xargs -0... yes
  checking rsync... yes
  checking curl... yes
  checking bup... yes
  checking gpg... yes
  checking sha1... sha1sum
  checking sha256... sha256sum
  checking sha512... sha512sum
  checking sha224... sha224sum
  checking sha384... sha384sum

...

Command/Add.hs:54:3:
    No instance for (Control.Monad.IO.Control.MonadControlIO
                       (Control.Monad.State.Lazy.StateT Annex.AnnexState IO))
      arising from a use of `handle' at Command/Add.hs:54:3-24
    Possible fix:
      add an instance declaration for
      (Control.Monad.IO.Control.MonadControlIO
         (Control.Monad.State.Lazy.StateT Annex.AnnexState IO))
    In the first argument of `($)', namely `handle (undo file key)'
    In a stmt of a 'do' expression:
          handle (undo file key) $ moveAnnex key file
    In the expression:
        do { handle (undo file key) $ moveAnnex key file;
             next $ cleanup file key }
cabal: Error: some packages failed to install:
git-annex-3.20110719 failed during the building phase. The exception was:
ExitFailure 1

After I added a depencency for monadIO to the git-annex.cabal file, it installed correctly.
-- Thomas

Comment by Thomas — Mon Aug 8 05:04:20 2011
comment 2
Finally got a chance to try to reproduce this. I followed your recipe exactly in a clean squeeze chroot. monadIO was not installed, but git-annex built ok, using monad-control.
Comment by joey — Wed Aug 17 00:56:30 2011
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