./bin/arb_sample_shading-builtin-gl-sample-id 8 -auto
Probe color at (0,0)
  Expected: 0.000000 1.000000 0.000000 1.000000
  Observed: 1.000000 0.000000 0.000000 1.000000
PIGLIT: {'result': 'fail' }


Bisect shows 83b83fb (mesa master) is the first bad commit.
commit 83b83fb9843456a231c60bcbac0594ebaf05dd4f
Author: Chris Forbes <chrisf@ijw.co.nz>
Date:   Sat Nov 30 10:03:10 2013 +1300

    i965/Gen7: Allow CMS layout for multisample textures
    
    Now that all the pieces are in place, this should provide
    a nice performance boost for apps using multisample textures.
    
    Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
    Reviewed-by: Paul Berry <stereotype441@gmail.com>
    Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>