[Mesa-users] Segfault copying extra vertices in VBO ?

[Brian Paul]

On 01/27/2014 09:02 PM, Anibal Morales wrote:
> Hello again Mesa users!
>
> I have been testing a suite of mesa versions trying to settle on the
> best one for my project. I was hoping for 10.0.* versions but I hit a snag:
>
> My application uses VBOs with extra vertices that comprise "degenerate"
> triangles (with only two vertices) in order for me to render a tile with
> triangle strips really fast with a single VBO.
>
> The problem is that Mesa versions 10.0.* die with a segfault in some
> routine which comments say it is trying to detect extra vertices being
> generated.
>
> Mesa 9.2.5 works fine.
>
> I need this OpenGL-sactioned behavior of having extra vertices... unless
> they do not allow that anymore ??
>
> I was wondering if someone can confirm this behavior with a small
> snippet of code... then you can take credit for bug report !!! (the
> freedesktop system did not answer my request for an account).
>

If you can't make a simple test program, can you try making an apitrace?

https://github.com/apitrace/apitrace

Please open a bug report with as much info as possible.  Attach the 
apitrace if possible.  I don't think you need an account in order to 
file a bug.

-Brian