[Mesa-stable] Regressions due to commit 1afe3359258

[Ilia Mirkin]

Hi Ken,

I just did a bisect looking for the failure that's causing a few
gs-related piglits to fail on nv50, and it came up with the below. Any
ideas? Here are the tests that are failing:

tests/spec/glsl-1.50/execution/geometry/clip-distance-out-values.shader_test
tests/spec/glsl-1.50/execution/geometry/max-input-components.shader_test
tests/spec/glsl-1.50/execution/geometry/point-size-out.shader_test
tests/spec/glsl-1.50/execution/geometry/primitive-id-out.shader_test
tests/spec/glsl-1.50/execution/gs-redeclares-both-pervertex-blocks.shader_test
tests/spec/glsl-1.50/execution/interface-vs-named-to-gs-array.shader_test
tests/spec/glsl-1.50/execution/redeclare-pervertex-out-subset-gs.shader_test
tests/spec/glsl-1.50/execution/redeclare-pervertex-subset-vs-to-gs.shader_test

1afe3359258a9e89b62c8638761f52d78f6d1cbc is the first bad commit
commit 1afe3359258a9e89b62c8638761f52d78f6d1cbc
Author: Kenneth Graunke <kenneth at whitecape.org>
Date:   Thu Mar 20 11:53:16 2014 -0700

    mesa: In core profile, refuse to draw unless a VAO is bound.

    Core profile requires a non-default VAO to be bound.  Currently, calls
    to glVertexAttribPointer raise INVALID_OPERATION unless a VAO is bound,
    and we never actually get any vertex data set.  Trying to draw without
    any vertex data can only cause problems.  In i965, it causes a crash.

    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=76400
    Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>
    Reviewed-by: Ian Romanick <ian.d.romanick at intel.com>
    Cc: mesa-stable at lists.freedesktop.org

Reverting this commit on top of master makes it work again. I have no
idea whether it's the tests/piglit infra that are wrong, or if it's
the commit that's wrong, but wanted to raise the issue. This still
happens with the (almost-)latest piglit (latest doesn't compile due to
EGL stuff...)

Let me know if you'd like any additional info.

Thanks,

  -ilia