[Bug 110424] Rendering artifacts created by long switch statement

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110424

--- Comment #3 from Clive McCarthy <CliveMcCarthy at gmail.com> ---
Thank you for working so hard on this issue. The FBO blitting turns out to be a
red herring.

My fragment shader is 'odd' in that is has large switch statement. This has
caused the linking time to be rather long as reported in bug #91857
and, to my surprise, it also causes the artifacts I reported here and in bug
#93676

I created a sample application that illustrates the problem. I'm afraid it will
be troublesome to build but it is possible to reproduce the artifacts in it.

The fragment shader's case statement has a #if ... #endif section that will
enable/disable the artifact problem.

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