[Bug 104335] [OpenGL CTS][SKL,KBL] KHR-GL45.vertex_attrib_64bit.limits_test occasionally fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104335

--- Comment #2 from Iago Toral <itoral at igalia.com> ---
(In reply to Iago Toral from comment #0)

> Interestingly, replacing gl_InstanceID with 0 in the shader code seems to
> make the problem go away entirely, which is quite surprising seeing that
> this test has otherwise a very high pass rate and does actual instanced draw
> calls that woudl rely on gl_InstanceID taking appropriate values.

I have tracked this part where we can make the test pass consistently  when we
replace gl_InstanceID by 0 down to a bug in CTS that was only validating the
first instance worth of results (See gerrit CL#2037 for a patch).

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