[[!comment format=mdwn
 username="https://www.google.com/accounts/o8/id?id=AItOawkSq2FDpK2n66QRUxtqqdbyDuwgbQmUWus"
 nickname="Jimmy"
 subject="tests fail with more recent installs of haskell platform"
 date="2011-02-07T12:43:43Z"
 content="""
I'm running ghc 6.12.3 with the corresponding haskell-platform package from the HP site which I installed in preference to the macports version of haskell-platform (it's quite old). it seems when you install quickcheck, the version that is installed is of version 2.4.0.1 and not 1.2.0 which git-annex depends on for its tests.

<pre>
jtang@x00:~ $ cabal install quickcheck --reinstall               
Resolving dependencies...
Configuring QuickCheck-2.4.0.1...
Preprocessing library QuickCheck-2.4.0.1...

..
and so on..
..

</pre>

it fails with this

<pre>
[54 of 54] Compiling Main             ( test.hs, test.o )

test.hs:56:3:
    No instance for (QuickCheck-1.2.0.1:Test.QuickCheck.Arbitrary Char)
      arising from a use of `qctest' at test.hs:56:3-64
    Possible fix:
      add an instance declaration for
      (QuickCheck-1.2.0.1:Test.QuickCheck.Arbitrary Char)
    In the expression:
        qctest \"prop_idempotent_deencode\" Git.prop_idempotent_deencode
    In the first argument of `TestList', namely
        `[qctest \"prop_idempotent_deencode\" Git.prop_idempotent_deencode,
          qctest \"prop_idempotent_fileKey\" Locations.prop_idempotent_fileKey,
          qctest
            \"prop_idempotent_key_read_show\"
            BackendTypes.prop_idempotent_key_read_show,
          qctest
            \"prop_idempotent_shellEscape\" Utility.prop_idempotent_shellEscape,
          ....]'
    In the second argument of `($)', namely
        `TestList
           [qctest \"prop_idempotent_deencode\" Git.prop_idempotent_deencode,
            qctest \"prop_idempotent_fileKey\" Locations.prop_idempotent_fileKey,
            qctest
              \"prop_idempotent_key_read_show\"
              BackendTypes.prop_idempotent_key_read_show,
            qctest
              \"prop_idempotent_shellEscape\" Utility.prop_idempotent_shellEscape,
            ....]'
</pre>

I'd imagine if I could downgrade, it would compile and pass the tests (I hope)

"""]]