https://bugs.freedesktop.org/show_bug.cgi?id=99843
--- Comment #2 from dan@jerber.co.uk --- I've just tried with multiple draw calls using the same VBO and it appears this does also cause the error. However, it appears there has to be 3 or more calls to cause the error (1 and 2 calls produce the expected output).
Apologies for that. It was the way my application works that led me down that path.
I currently do not have a simple program that demonstrates the error. I have amended the application I've been writing to call the test shaders as I was trying to work out what was wrong with my application. I could probably create something. What is the usual format to provide this in?
Thanks.