[Agda] Compilation of Parser.y depends on the locale on Debian too

[Andrés Sicard-Ramírez]

Hi Eduardo,

Thank you for reporting the issue and his solution.

I could reproduce the issue after running `export LC_ALL=C` in my
Ubuntu machine.

Please report the issue in https://github.com/agda/agda/issues so we
can track similar issues. I shall update the documentation shortly.

Best,

On Fri, 2 Jul 2021 at 09:46, Eduardo Ochs <eduardoochs at gmail.com> wrote:
>
> Hi list,
>
> the latest version of the Agda Manual from
>
>   https://readthedocs.org/projects/agda/downloads/pdf/latest/
>
> mentions a certain error as something that can only happen on M$
> Windows. It says:
>
>   Warning: If you are installing Agda using Cabal on Windows,
>   depending on your system locale setting, cabal install Agda may fail
>   with an error message:
>
>   hGetContents: invalid argument (invalid byte sequence)
>
>   If this happens, you can try changing the console code page to UTF-8
>   using the command:
>
>   CHCP 65001
>
> I'm on Debian stable and I got something similar. I tried to install
> Agda with
>
>   cabal update
>   cabal install Agda
>
> and it failed with:
>
>   happy: src/full/Agda/Syntax/Parser/Parser.y: hGetContents: invalid
>   argument (invalid byte sequence)
>   cabal: Failed to build Agda-2.6.2. See the build log above for
>   details.
>
> My default value for $LC_ALL is "C" and the only uncommented line in
> my /etc/locale.gen is this one:
>
>   en_GB.UTF-8 UTF-8
>
> If I run this
>
>   export LC_ALL=en_GB.UTF-8
>   cabal install Agda
>
> instead of just "cabal install Agda" the compilation succeeds.
>
>   Cheers,
>     Eduardo Ochs
>     http://angg.twu.net/#eev
>     http://angg.twu.net/math-b.html
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-- 
Andrés