Bug 10590

System Enviroment:
--------------------------
Arch:           945gm i386
OSD:            Fedora Core release 5 (Bordeaux)
Kernel:         2.6.20
Mesa:           af807a4696866a4ee08bb2a4e95b9c02011db530
Drm:            833df88d0d63bc96dcc57d0193d133b2a594e1d6

Bug detailed description:
--------------------------
running gl-117 would disable the mouse.
Back trace is as following:
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1211554128 (LWP 3567)]
0xb7bb725e in triangle_twoside_rgba (ctx=0x8140e10, e0=10, e1=11, e2=8)
    at swrast_setup/ss_tritmp.h:66
66                     if (IND & SS_RGBA_BIT) {
Current language:  auto; currently c
(gdb) bt
#0  0xb7bb725e in triangle_twoside_rgba (ctx=0x8140e10, e0=10, e1=11, e2=8)
    at swrast_setup/ss_tritmp.h:66
#1  0xb7b52034 in _tnl_render_poly_elts (ctx=0x8140e10, start=0, count=4,
    flags=48) at tnl/t_vb_rendertmp.h:313
#2  0xb7b52335 in _tnl_RenderClippedPolygon (ctx=0x8140e10, elts=0xbff57758,
    n=4) at tnl/t_vb_render.c:244
#3  0xb7b5463d in clip_quad_4 (ctx=0x8140e10, v0=Variable "v0" is not available.
) at tnl/t_vb_cliptmp.h:281
#4  0xb7b54fa5 in clip_render_quads_verts (ctx=0x8140e10, start=0, count=4,
    flags=55) at tnl/t_vb_rendertmp.h:338
#5  0xb7b524a5 in run_render (ctx=0x8140e10, stage=0x818e8e4)
    at tnl/t_vb_render.c:320
#6  0xb7b4d30d in _tnl_run_pipeline (ctx=0x8140e10) at tnl/t_pipeline.c:159
#7  0xb7ac181d in intelRunPipeline (ctx=0x8140e10) at intel_tris.c:764
#8  0xb7b4df6f in _tnl_draw_prims (ctx=0x8140e10, arrays=0x817caa8,
    prim=0x817b604, nr_prims=1, ib=0x0, min_index=0, max_index=3)
    at tnl/t_draw.c:400
#9  0xb7b46dce in vbo_exec_vtx_flush (exec=0x817b4e0)
    at vbo/vbo_exec_draw.c:215
#10 0xb7b42a40 in vbo_exec_FlushVertices (ctx=0x8140e10, flags=1)
    at vbo/vbo_exec_api.c:680
#11 0xb7be2e17 in _mesa_set_enable (ctx=0x8140e10, cap=3042, state=0 '\0')
    at main/enable.c:231
#12 0xb7be51bf in _mesa_Disable (cap=3042) at main/enable.c:985
---Type <return> to continue, or q <return> to quit---
#13 0xb7f4b33b in glDisable (cap=3042)
    at ../../../src/mesa/glapi/glapitemp.h:1155
#14 0x080a5c56 in EditField::draw (this=0x8bff588) at menu.cpp:730
#15 0x080a50ff in Container::draw (this=0x8be51e0) at menu.cpp:151
#16 0x080a50ff in Container::draw (this=0x80c87c0) at menu.cpp:151
#17 0x080a6b95 in Container::eventMouse (this=0x80c87c0, x=558, y=378,
    button=0) at menu.cpp:194
#18 0x08062024 in sdlMainLoop () at main.cpp:4939
#19 0x08062795 in main (argc=1, argv=0x81797e8) at main.cpp:7593

Reproduce steps:
----------------
1.startup X
2.run gl-117
3.move mouse