(gdb) bt
#0  0xffffe410 in __kernel_vsyscall ()
#1  0x009d1159 in raise () from /lib/libc.so.6
#2  0x009d26e3 in abort () from /lib/libc.so.6
#3  0x009caabd in __assert_fail () from /lib/libc.so.6
#4  0xb239ed2c in intelStartInlinePrimitive (intel=0x89fd2c0, prim=0,
	batch_flags=1) at intel_tris.c:114
#5  0xb237b631 in intelDmaPrimitive (intel=0x89fd2c0, prim=4)
	at intel_render.c:116
#6  0xb237b91f in intel_render_quads_verts (ctx=0x89fd2c0, start=0, count=4,
	flags=55) at ../../../../../src/mesa/tnl_dd/t_dd_dmatmp.h:626
#7  0xb237b845 in intel_run_render (ctx=0x89fd2c0, stage=0x8a3fa34)
	at intel_render.c:226
#8  0xb24394c5 in _tnl_run_pipeline (ctx=0x89fd2c0) at tnl/t_pipeline.c:158
#9  0xb239eb67 in intelRunPipeline (ctx=0x89fd2c0) at intel_tris.c:898
#10 0xb243a128 in _tnl_draw_prims (ctx=0x89fd2c0, arrays=0x8a2dc20,
	prim=0x8a2c77c, nr_prims=1, ib=0x0, min_index=0, max_index=3)
	at tnl/t_draw.c:402
#11 0xb2432ebe in vbo_exec_vtx_flush (exec=0x8a2c658)
	at vbo/vbo_exec_draw.c:215
#12 0xb242eb30 in vbo_exec_FlushVertices (ctx=0x89fd2c0, flags=1)
	at vbo/vbo_exec_api.c:685
#13 0xb24cd184 in client_state (ctx=0x89fd2c0, cap=32886, state=1 '\001')
	at main/enable.c:130
---Type <return> to continue, or q <return> to quit---
#14 0xb24cd2b0 in _mesa_EnableClientState (cap=32886) at main/enable.c:157
#15 0xb25d5ebc in glEnableClientState (array=32886)
	at ../../../src/mesa/glapi/glapitemp.h:1665
#16 0x080f48da in ?? ()
#17 0x080f312d in ?? ()
#18 0x080dd8c5 in ?? ()
#19 0x080de5ca in ?? ()
#20 0x080e2f18 in ?? ()
#21 0x0805d91d in ?? ()
#22 0x0805a7da in ?? ()
#23 0x0806f30a in ?? ()
#24 0x0810330a in ?? ()
#25 0x009be7e4 in __libc_start_main () from /lib/libc.so.6
#26 0x0804aea1 in ?? ()
(gdb)