Re: [Mesa3d-dev] Segfault on glClear of non-existent stencil buffer caused by bd1ce874728c06d08a1f9881f51edbdd2f1c9db0

[Brian P. <br...@vm...>]

Luca Barbieri wrote:
> Apparently _mesa_Clear should not set BUFFER_BIT_STENCIL if the visual
> lacks a stencil buffer.
> 
> So it seems the visual is somehow incorrect, or a visual with a
> stencil buffer is being selected but the stencil renderbuffer is not
> actually set.

At line 167 of src/mesa/main/clear.c we check if the user specifies
GL_STENCIL_BUFFER_BIT but the drawing surface has no stencil bits.

So, st_clear() should not be getting BUFFER_BIT_STENCIL if there's no 
stencil buffer.

Perhaps you could debug that a bit further.

-Brian