gdb> bt full

#0  0x0012d422 in __kernel_vsyscall ()
No symbol table info available.
#1  0x003325e1 in raise () from /lib/tls/i686/cmov/libc.so.6
No symbol table info available.
#2  0x00335a42 in abort () from /lib/tls/i686/cmov/libc.so.6
No symbol table info available.
#3  0x0032b748 in __assert_fail () from /lib/tls/i686/cmov/libc.so.6
No symbol table info available.
#4  0x004ddc3b in driNewRenderbuffer (format=MESA_FORMAT_ARGB8888, addr=0xb1fec000, cpp=2, offset=0, pitch=4096, dPriv=0x83226c8) at ../common/drirenderbuffer.c:63
        drb = 0x8322738
        __PRETTY_FUNCTION__ = "driNewRenderbuffer"
#5  0x004dfafc in savageCreateBuffer (driScrnPriv=0x805c750, driDrawPriv=0x83226c8, mesaVis=0x805cc38, isPixmap=0 '\000') at savage_xmesa.c:605
        frontRb = 0x0
        swStencil = 0 '\000'
        fb = 0x8322738
        float_depth = 0 '\000'
        screen = 0x805c0e0
        __PRETTY_FUNCTION__ = "savageCreateBuffer"
#6  0x004d6fe2 in driCreateNewDrawable (psp=0x805c750, config=0x805cc38, hwDrawable=1, renderType=1, attrs=0x0, data=0x8094348) at ../common/dri_util.c:458
        pdp = 0x83226c8
#7  0x0017cb63 in driCreateDrawable (psc=0x8059798, xDrawable=10485764, drawable=10485764, modes=0x805c168) at dri_glx.c:593
        pdraw = 0x8094348
        hwDrawable = 1
        empty_attribute_list = 0x0
        config = 0x805c168
#8  0x001489ba in FetchDRIDrawable (dpy=0x804f008, glxDrawable=10485764, gc=0x805bea8) at glxcurrent.c:294
        priv = 0x8059618
        pdraw = 0x8059618
        psc = 0x8059798
#9  0x00148c14 in MakeContextCurrent (dpy=0x804f008, draw=10485764, read=10485764, gc=0x805bea8) at glxcurrent.c:370
        pdraw = 0x0
        pread = 0x1
        reply = {type = 244 '\364', unused = 191 '\277', sequenceNumber = 18, length = 134514665, contextTag = 1, pad2 = 3221222240, pad3 = 1169014, pad4 = 1231536, pad5 = 0, pad6 = 1}
        oldGC = 0x1a51c0
        opcode = 153 '\231'
        oldOpcode = 153 '\231'
        bindReturnValue = 134514352
        state = 0x1
#10 0x00148fe7 in glXMakeCurrent (dpy=0x804f008, draw=10485764, gc=0x805bea8) at glxcurrent.c:506
No locals.
#11 0x08049910 in print_screen_info (dpy=0x804f008, scrnum=0, allowDirect=1, limits=0 '\000') at glxinfo.c:469
        win = 10485764
        attribSingle = {4, 8, 1, 9, 1, 10, 1, 0}
        attribDouble = {4, 8, 1, 9, 1, 10, 1, 5, 0}
        attr = {background_pixmap = 134514749, background_pixel = 0, border_pixmap = 0, border_pixel = 0, bit_gravity = 1, win_gravity = 0, backing_store = 65793, backing_planes = 1, backing_pixel = 1, save_under = 1, event_mask = 163840, do_not_propagate_mask = 0, override_redirect = 0, colormap = 10485763, cursor = 0}
        mask = 10250
        root = 99
        ctx = 0x805bea8
        visinfo = 0x805a1c0
        width = 100
        height = 100
#12 0x0804b6bf in main (argc=1, argv=0xbffff624) at glxinfo.c:1168
        displayName = 0x0
        dpy = 0x804f008
        numScreens = 1
        scrnum = 0
        mode = Normal
        findBest = 0 '\000'
        limits = 0 '\000'
        allowDirect = 1
        i = 1

gdb> info reg

eax            0x0	0
ecx            0xc2c	3116
edx            0x6	6
ebx            0xc2c	3116
esp            0xbfffefec	0xbfffefec
ebp            0xbfffeff8	0xbfffeff8
esi            0x4342de	4408030
edi            0x457ff4	4554740
eip            0x12d422	0x12d422 <__kernel_vsyscall+2>
eflags         0x200202	[ IF ID ]
cs             0x73	115
ss             0x7b	123
ds             0x7b	123
es             0x7b	123
fs             0x0	0
gs             0x33	51