Re: [wxhaskell-users] Sigsev on Process example

[Daan L. <da...@cs...>]

Benedikt Grundmann wrote:

>Hello List,
>
>I just tried the Process example on my debian gnu linux (testing) laptop 
>(intel centrino).  Linux kernel version 2.6.7.  
>
>wxgtk-2.4-config --version reports 2.4.2  (debian package)
>ghc --version reports 6.2.1
>
>I'm using wxhaskell-0.8 compiled using --with-opengl.  I get segmentation 
>faults most of the time:
>  
>
Hi Benedikt,

The asynchronous process seemed to work well on windows, but since we 
use it intensively
with Helium, we noticed that it sometimes crashes too :-(  We still try 
to debug this but it is
a hard one to solve due to the asynchronous nature. We have not tested 
it on debian, but maybe
we should as it seems to occur at least at well-defined moments! 

Bottom line: the process feature has bugs.. and it won't get solved soon 
as I am currently working
on other features (like printing). However, I would like to see it 
debugged as it is a tremendously
useful feature and because we need to run Helium.

>What's going on?  On a side note how is one supposed to use the 
>inputStreamRead* collection of functions (see Graphics.UI.WXCore.Process)
>there does not seem to be a function to get an InputStream given a Process.
>  
>
These are just convenience functions on streams. There are used 
internally to provide the "OnReceive"
functions for processes and you can't use them directly on processes.

I hope this helps,
-- Daan.

>
>Cheers and Thanks for your help,
>
>
>Bene
>
>
>  
>