.
Thread 1 (process 11109):
#0  0x0032d1e6 in glGetError () from /usr/lib/libGL.so.1
#1  0x00b67e7f in ffi_call_SYSV ()
   from /usr/lib/python2.6/lib-dynload/_ctypes.so
#2  0x00b67cac in ffi_call () from /usr/lib/python2.6/lib-dynload/_ctypes.so
#3  0x00b6229d in _CallProc () from /usr/lib/python2.6/lib-dynload/_ctypes.so
#4  0x00b5a082 in ?? () from /usr/lib/python2.6/lib-dynload/_ctypes.so
#5  0x080611ca in PyObject_Call (func=0xb7ed391c, arg=0xb804902c, kw=0x0)
    at ../Objects/abstract.c:2492
	result = (PyObject *) 0x0
	call = (ternaryfunc) 0xb59f90
#6  0x080db7ee in PyEval_EvalFrameEx (f=0x97c5d2c, throwflag=0)
    at ../Python/ceval.c:3924
	sp = (PyObject **) 0x97c5e80
	stack_pointer = <value optimized out>
	next_instr = (unsigned char *) 0x950999d "}\005"
	opcode = <value optimized out>
	oparg = <value optimized out>
	why = 3085777180
	err = <value optimized out>
	x = <value optimized out>
	v = <value optimized out>
	w = <value optimized out>
	u = <value optimized out>
	t = <value optimized out>
	stream = <value optimized out>
	freevars = (PyObject **) 0x97c5e7c
	retval = (PyObject *) 0x0
	tstate = (PyThreadState *) 0x9442050
	co = (PyCodeObject *) 0x95214a0
	instr_ub = -1
	instr_lb = 0
	instr_prev = <value optimized out>
	first_instr = (unsigned char *) 0x9509994 "|"
	names = (PyObject *) 0x952208c
	consts = (PyObject *) 0x9520af4
#7  0x080dd992 in PyEval_EvalCodeEx (co=0x95214a0, globals=0x9513b54, 
    locals=0x0, args=0xb803ce70, argcount=4, kws=0x0, kwcount=0, 
    defs=0x9522618, defcount=2, closure=0x0) at ../Python/ceval.c:2968
	f = (PyFrameObject *) 0x97c5d2c
	retval = <value optimized out>
	freevars = (PyObject **) 0x97c5e7c
	tstate = (PyThreadState *) 0x9442050
	x = <value optimized out>
	u = <value optimized out>
#8  0x0815fa7c in function_call (func=0x951b64c, arg=0xb803ce64, kw=0x0)
    at ../Objects/funcobject.c:524
	result = <value optimized out>
	argdefs = <value optimized out>
	d = (PyObject **) 0x9522618
	nk = <value optimized out>
	nd = 2
#9  0x080611ca in PyObject_Call (func=0x951b64c, arg=0xb803ce64, kw=0x0)
    at ../Objects/abstract.c:2492
	result = (PyObject *) 0x3
	call = (ternaryfunc) 0x815f9e0 <function_call>
#10 0x0806844c in instancemethod_call (func=0xb7ee7504, arg=0xb803ce64, 
    kw=0x0) at ../Objects/classobject.c:2579
	self = (PyObject *) 0x95226cc
	klass = (PyObject *) 0x3
	result = <value optimized out>
#11 0x08062537 in PyObject_Call (func=0xb7ee7504, arg=0xbfc16f60, 
    kw=<value optimized out>) at ../Objects/abstract.c:2492
	result = (PyObject *) 0xb7ee7504
	call = (ternaryfunc) 0x80682f0 <instancemethod_call>
#12 0x0806456e in PyObject_CallFunctionObjArgs (callable=0xb7ee7504)
    at ../Objects/abstract.c:2723
	args = (PyObject *) 0x977f644
	tmp = <value optimized out>
#13 0x00b5a0b9 in ?? () from /usr/lib/python2.6/lib-dynload/_ctypes.so
#14 0x080611ca in PyObject_Call (func=0x9799574, arg=0xb808354c, kw=0x0)
    at ../Objects/abstract.c:2492
	result = (PyObject *) 0x0
	call = (ternaryfunc) 0xb59f90
#15 0x080db7ee in PyEval_EvalFrameEx (f=0x94a6a9c, throwflag=0)
    at ../Python/ceval.c:3924
	sp = (PyObject **) 0x94a6bd8
	stack_pointer = <value optimized out>
	next_instr = (unsigned char *) 0xb8068365 "\001e\b"
	opcode = <value optimized out>
	oparg = <value optimized out>
	why = 158963060
	err = <value optimized out>
	x = <value optimized out>
	v = <value optimized out>
	w = <value optimized out>
	u = <value optimized out>
	t = <value optimized out>
	stream = <value optimized out>
	freevars = (PyObject **) 0x94a6bd4
	retval = (PyObject *) 0x0
	tstate = (PyThreadState *) 0x9442050
	co = (PyCodeObject *) 0xb8021e30
	instr_ub = -1
	instr_lb = 0
	instr_prev = <value optimized out>
	first_instr = (unsigned char *) 0xb806832c "d"
	names = (PyObject *) 0xb806bc34
	consts = (PyObject *) 0xb802de9c
#16 0x080dd992 in PyEval_EvalCodeEx (co=0xb8021e30, globals=0xb807b1c4, 
    locals=0xb807b1c4, args=0x0, argcount=0, kws=0x0, kwcount=0, defs=0x0, 
    defcount=0, closure=0x0) at ../Python/ceval.c:2968
	f = (PyFrameObject *) 0xbfc179bc
	retval = <value optimized out>
	freevars = (PyObject **) 0x94a6bd4
	tstate = (PyThreadState *) 0x9442050
	x = <value optimized out>
	u = <value optimized out>
#17 0x080dda97 in PyEval_EvalCode (co=0xb8021e30, globals=0xb807b1c4, 
    locals=0xb807b1c4) at ../Python/ceval.c:522
No locals.
#18 0x080fa52f in PyRun_FileExFlags (fp=0x9461510, 
    filename=0xbfc186c7 "opengl-text.py", start=257, globals=0xb807b1c4, 
    locals=0xb807b1c4, closeit=1, flags=0xbfc179bc)
    at ../Python/pythonrun.c:1335
	ret = <value optimized out>
	mod = <value optimized out>
	arena = (PyArena *) 0x948bad0
#19 0x080fa722 in PyRun_SimpleFileExFlags (fp=0x9461510, 
    filename=0xbfc186c7 "opengl-text.py", closeit=1, flags=0xbfc179bc)
    at ../Python/pythonrun.c:931
	m = <value optimized out>
	d = (PyObject *) 0xb807b1c4
	v = <value optimized out>
	ext = <value optimized out>
	set_file_name = 1
	ret = <value optimized out>
#20 0x0805c898 in Py_Main (argc=2, argv=0xbfc17a84) at ../Modules/main.c:599
	c = <value optimized out>
	sts = 0
	command = 0x0
	filename = 0xbfc16f60 "\237\016%"
	module = 0x0
	fp = (FILE *) 0x9461510
	p = <value optimized out>
	unbuffered = 1
	skipfirstline = 0
	stdin_is_interactive = 1
	help = -1077836089
	version = 1
	saw_unbuffered_flag = 1
	cf = {cf_flags = 0}
#21 0x0805baab in main (argc=2, argv=0xbfc17a84) at ../Modules/python.c:23
No locals.