[Mesa-dev] [PATCH] fix crash: check for _NumLinkedShaders being 0.

[Török Edwin]

On Sun, 5 Sep 2010 09:48:22 -0700
Ian Romanick <idr at paranormal-entertainment.com> wrote:

> On Sep 4, 2010, at 3:48 AM, Török Edwin <edwintorok at gmail.com> wrote:
> 
> > From: Török Edvin <edwintorok at gmail.com>
> >
> > Otherwise spring 0.82+.4.0 crashes when starting a game
> > because prog->_LinkedShaders[0] is NULL.
> 
> Any idea what this app is doing to hit this?  A piglit test would be  
> good.
> 

Looks like this occurs when linking a completely empty program.
I wrote a piglit test based on other similar tests (see attached file).

This is first time I write a piglit test, so I'm not sure if this is
the right way to do it, but here is what it does:
$ bin/glsl-emptylink
Segmentation fault

After applying the mesa patch:
$ bin/glsl-emptylink 
PIGLIT: {'result': 'pass' }

Best regards,
--Edwin
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