mesa: 02b6da1e87ddf333a71b37234c356b3f3f7f58be (master)

$ ./bin/arb_framebuffer_srgb-blit renderbuffer linear downsample disabled -auto
Mesa warning: failed to remap glClampColorARB
Mesa warning: failed to remap glTexBufferARB
Mesa warning: failed to remap glFramebufferTextureARB
Mesa warning: failed to remap glVertexAttribDivisorARB
Mesa warning: failed to remap glProgramParameteriARB
Mesa: User error: GL_INVALID_VALUE in glRenderbufferStorageMultisample(samples)
Mesa: User error: GL_INVALID_FRAMEBUFFER_OPERATION in glClear(incomplete framebuffer)
Mesa: User error: GL_INVALID_FRAMEBUFFER_OPERATION in glDrawArrays(incomplete framebuffer)
Mesa: User error: GL_INVALID_FRAMEBUFFER_OPERATION in glBlitFramebufferEXT(incomplete draw/read buffers)
Probe at (3,0)
  Expected: 0.011765 0.011765 0.011765 0.011765
  Observed: 0.000000 0.000000 0.000000 0.000000
PIGLIT: {'result': 'fail' }

d60da27273d2cdb68bc32cae2ca66718dab15f27 is the first bad commit
commit d60da27273d2cdb68bc32cae2ca66718dab15f27
Author: Brian Paul <brianp@vmware.com>
Date:   Sat Jan 26 10:09:37 2013 -0700

    st/mesa: set ctx->Const.MaxSamples = 0, not 1

    The gallium docs for pipe_screen::is_format_supported() says that
    samples==0 or samples==1 both mean that multisampling is not supported.
    Return GL_MAX_SAMPLES==0 instead of 1 for consistency with other drivers.

    Note: This is a candidate for the 9.0 branch.

    Reviewed-by: Marek Olšák <maraeo@gmail.com>

:040000 040000 64c1ec30eb70405a7fa013b61155d970c577d0bc aae198f799e5b088e4953afea23096f9c2176024 M      src
bisect run success