On Sat, Sep 24, 2011 at 11:25 AM, Antoine Latter <aslatter@gmail.com> wrote:
On Sat, Sep 24, 2011 at 12:43 AM, csmagic <csmagic@gmail.com> wrote:
> On Sat, Sep 24, 2011 at 10:45 AM, Antoine Latter <aslatter@gmail.com> wrote:
>>
>> On Fri, Sep 23, 2011 at 10:42 PM, csmagic <csmagic@gmail.com> wrote:
>> >
>> >
>> > On Thu, Sep 22, 2011 at 4:20 PM, Amy de Buitléir <amy@nualeargais.ie>
>> > wrote:
>> >>
>> >> csmagic <csmagic <at> gmail.com> writes:
>> >>
>> >> >
>> >> > Thanks Joey, AmyNow I want to go 'backwards'.For example I have
>> >> > Language.Haskell.Exts.SyntaxI want to dig into it.  Where/How do I
>> >> > start?
>> >>
>> >> Using either Hayoo or Hoogle, search for
>> >> "Language.Haskell.Exts.Syntax".
>> >> Click on
>> >> the results to find out more about this module (what package it's in,
>> >> what
>> >> methods it contains, etc.) Does that answer your question?
>> >
>> > Trying out the graphviz package...
>> >
>> > $ cabal list|grep -i graphviz
>> > gives
>> > cabal: <stdout>: invalid argument
>> > and nothing else
>> >
>>
>> Your example works great for me. What OS are you using, and what
>> version of cabal?
>>
>> You could also try:
>>
>> > cabal list graphviz
>>
>> But that doesn't give you all of the power of regular expressions.
>

My only guess is that something is odd about your terminal - I've
never seen that error message before, on linux or anywhere else.

It seems to be happening elsewhere also:
http://hackage.haskell.org/trac/hackage/ticket/856

Also its more likely a locale issue than a terminal one because I get the same error when I replace the pipe with a redirection to a file.

And yet my locales dont seem to be odd in any way (I can see)

$ locale
LANG=en_US
LANGUAGE=
LC_CTYPE="en_US"
LC_NUMERIC="en_US"
LC_TIME="en_US"
LC_COLLATE="en_US"
LC_MONETARY="en_US"
LC_MESSAGES="en_US"
LC_PAPER="en_US"
LC_NAME="en_US"
LC_ADDRESS="en_US"
LC_TELEPHONE="en_US"
LC_MEASUREMENT="en_US"
LC_IDENTIFICATION="en_US"
LC_ALL=


$ locale -a
C
C.UTF-8
en_US
en_US.iso88591
en_US.iso885915
en_US.utf8
POSIX



> $ cabal --version
> cabal-install version 0.10.2
> using version 1.10.1.0 of the Cabal library
>
> [I just did a cabal update cabal. Did not do anything as far as I can see]
>
> $ uname -rv
> 2.6.32-5-686 #1 SMP Tue Mar 8 21:36:00 UTC 2011
>
> $ cat /etc/debian_version
> wheezy/sid
>
> On a related note I find a lot of libghc6-something-or-other which are all
> described as dummy packages.
>
> Is Debian not the best system to play around with Haskell?
> I gather gentoo is where the most haskell development happens...
>

I used to do Haskell development on Ubuntu - I would install the base
libraries from apt, and then use 'cabal' user installs to do the rest.
These days I work on a Mac, where I start with the Haskell Platform
installer.

There's an active Debian+Haskell group; I don't know much about gentoo
(maybe they don't advertise as much).

Sorry I couldn't be of much help with the odd error.

Antoine