https://bugs.freedesktop.org/show_bug.cgi?id=97909
--- Comment #3 from Nicolai Hähnle nhaehnle@gmail.com --- Hi Christian, that really shouldn't happen. Can you provide an apitrace that shows the problem? My guess is that the index buffer tracking gets into an odd state because of the previous BufferData-related errors, but I don't yet see where that would be exactly.