System Environment:
--------------------------
Platform: Pineview
Libdrm:		(master)libdrm-2.4.52
Mesa:		(master)00c672086c31f94dd96609fa976300781f53792e
Xserver:	(master)xorg-server-1.15.0-558-gc1ce807d9f18f215332d7eeb844e8c640f71c53c
Xf86_video_intel:(master)2.99.907-52-gc9e9c85fc7b21e231c2532fe1c75b92307e112ed
Cairo:		(master)2a7f133639bed86a29dd9693cb78c0aa42eaff30
Libva:		(staging)79ddde6bab54618046f136471c020c08ff4fde50
Libva_intel_driver:(staging)6736a39fce442a8e5abb2a2e99adf56e3965d35f
Kernel:	(drm-intel-nightly) 164a4cb4c1431a0689f85507868356fae24da638

Bug detailed description:
-----------------------------
It segfault on Pineview with mesa master branch. It doesn't happen on mesa 10.0 branch.

Bisect shows: 50ce6f682da57bbbc7b78e99f9aeb9422b05dd6e is the first bad commit
commit 50ce6f682da57bbbc7b78e99f9aeb9422b05dd6e
Author:     Kenneth Graunke <kenneth@whitecape.org>
AuthorDate: Wed Jan 15 10:08:06 2014 -0800
Commit:     Kenneth Graunke <kenneth@whitecape.org>
CommitDate: Wed Jan 22 17:18:55 2014 -0800

    mesa: Bump MAX_TEXTURE_IMAGE_UNITS to 32.

    This allows drivers to optionally support more than 16 texture units.

    Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
    Reviewed-by: Matt Turner <mattst88@gmail.com>
    Reviewed-by: Chris Forbes <chrisf@ijw.co.nz>

output:
GL_MAX_TEXTURE_IMAGE_UNITS = 8
GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS = 32
GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS = 40
Segmentation fault (core dumped)

bt:
#0  0xb78e7229 in fetch_texel_2d_f_xrgb8888 (texImage=0x837e0d8, i=0, j=0,
    k=0, texel=0xbfffd378) at swrast/s_texfetch_tmp.h:495
#1  0xb78fcd97 in sample_2d_linear (rgba=<optimized out>,
    texcoord=<optimized out>, img=0x837e0d8, samp=0x8386578, ctx=0xb771401c)
    at swrast/s_texfilter.c:1183
#2  sample_linear_2d (ctx=0xb771401c, samp=0x8386578, tObj=0x8386550, n=1,
    texcoords=0xbfffd4b8, lambda=0xbfffd438, rgba=0xbfffd400)
    at swrast/s_texfilter.c:1397
#3  0xb78d7907 in fetch_texel_lod (ctx=0xb771401c, texcoord=0xbfffd4b8,
    lambda=0, unit=32, color=0xbfffd4d8) at swrast/s_fragprog.c:91
#4  0xb793bfb8 in fetch_texel (color=<optimized out>, lodBias=<optimized out>,
    texcoord=<optimized out>, inst=<optimized out>, machine=<optimized out>,
    ctx=<optimized out>) at program/prog_execute.c:340
#5  _mesa_execute_program (ctx=ctx@entry=0xb771401c,
    program=program@entry=0x8391520, machine=machine@entry=0x8086c40)
    at program/prog_execute.c:1566
#6  0xb78d7c2c in run_program (end=20, span=0xbfffd7bc,
    span@entry=0xb78d75d0 <fetch_texel_deriv>, ctx=ctx@entry=0xb771401c,
    start=<optimized out>) at swrast/s_fragprog.c:222
#7  _swrast_exec_fragment_program (ctx=ctx@entry=0xb771401c,
    span=span@entry=0xbfffd7bc) at swrast/s_fragprog.c:279
#8  0xb78df358 in shade_texture_span (span=0xbfffd7bc, ctx=0xb771401c)
    at swrast/s_span.c:1007
#9  _swrast_write_rgba_span (ctx=ctx@entry=0xb771401c,
    span=span@entry=0xbfffd7bc) at swrast/s_span.c:1261
#10 0xb7908be5 in general_triangle (ctx=0xb771401c, v0=0xb6576020,
    v1=0xb65763a8, v2=0xb6576730) at swrast/s_tritemp.h:819
#11 0xb78d0813 in _swrast_validate_triangle (ctx=0xb771401c, v0=0xb6576020,
    v1=0xb65763a8, v2=0xb6576730) at swrast/s_context.c:362
#12 0xb78d09ce in _swrast_Triangle (ctx=ctx@entry=0xb771401c, v0=0xb6576020,
    v1=0xb65763a8, v2=0xb6576730) at swrast/s_context.c:629
#13 0xb791af3e in triangle_rgba (ctx=0xb771401c, e0=0, e1=1, e2=2)
    at swrast_setup/ss_tritmp.h:176
#14 0xb78a9b47 in _tnl_render_tri_fan_verts (ctx=0xb771401c, start=0, count=4,
    flags=54) at tnl/t_vb_rendertmp.h:279
#15 0xb78ab29f in run_render (ctx=0xb771401c, stage=0x80accf8)
    at tnl/t_vb_render.c:321
#16 0xb78a5cc7 in _tnl_run_pipeline (ctx=ctx@entry=0xb771401c)
    at tnl/t_pipeline.c:163
#17 0xb7a1e792 in intelRunPipeline (ctx=0xb771401c) at intel_tris.c:1097
#18 0xb78a65ff in _tnl_draw_prims (ctx=ctx@entry=0xb771401c, arrays=0x809ac2c,
    prim=prim@entry=0xbffff0e8, nr_prims=nr_prims@entry=1, ib=0x0,
    min_index=0, max_index=3) at tnl/t_draw.c:526
#19 0xb78a6d17 in _tnl_vbo_draw_prims (ctx=0xb771401c, prim=0xbffff0e8,
    nr_prims=1, ib=0x0, index_bounds_valid=1 '\001', min_index=0, max_index=3,
    tfb_vertcount=0x0, indirect=0x0) at tnl/t_draw.c:426
#20 0xb7888754 in vbo_draw_arrays (ctx=ctx@entry=0xb771401c,
    mode=mode@entry=6, start=start@entry=0, count=count@entry=4,
    numInstances=numInstances@entry=1, baseInstance=baseInstance@entry=0)
    at vbo/vbo_exec_array.c:661
#21 0xb7888842 in vbo_exec_DrawArrays (mode=6, start=0, count=4)
    at vbo/vbo_exec_array.c:813
#22 0xb7f1af5d in stub_glDrawArrays (mode=6, first=0, count=4)
    at /GFX/Test/Piglit/piglit/tests/util/generated_dispatch.c:6223
#23 0x080492f0 in draw_rect_core (ix=0, iy=0, iw=20, ih=20)
    at /GFX/Test/Piglit/piglit/tests/texturing/max-samplers.c:135
#24 0x08049403 in piglit_display ()
    at /GFX/Test/Piglit/piglit/tests/texturing/max-samplers.c:170
#25 0xb7f08aff in run_test (gl_fw=0x804c008, argc=1, argv=0xbffff3a4)
    at /GFX/Test/Piglit/piglit/tests/util/piglit-framework-gl/piglit_fbo_framework.c:52
#26 0xb7f069a4 in piglit_gl_test_run (argc=1, argv=0xbffff3a4,
    config=0xbffff2c8)
    at /GFX/Test/Piglit/piglit/tests/util/piglit-framework-gl.c:191
#27 0x0804907d in main (argc=1, argv=0xbffff3a4)
    at /GFX/Test/Piglit/piglit/tests/texturing/max-samplers.c:41

Reproduce steps:
----------------------------
1. xinit
2. bin/max-samplers -fbo -auto