Program received signal SIGABRT, Aborted.
[Switching to Thread -1226590528 (LWP 19758)]
0xb7eed410 in __kernel_vsyscall ()
(gdb) bt
#0  0xb7eed410 in __kernel_vsyscall ()
#1  0xb7412df0 in raise () from /lib/tls/i686/cmov/libc.so.6
#2  0xb7414641 in abort () from /lib/tls/i686/cmov/libc.so.6
#3  0xb740c43b in __assert_fail () from /lib/tls/i686/cmov/libc.so.6
#4  0xb77f27af in _cairo_pen_find_active_cw_vertex_index (pen=0xbfeba0d4,
    slope=0xbfeb9ff0, active=0xbfeb9ff8)
    at /build/buildd/libcairo-1.3.14/src/cairo-pen.c:323
#5  0xb77f0ef4 in _cairo_stroker_add_cap (stroker=0xbfeba0bc, f=0xbfeba020)
    at /build/buildd/libcairo-1.3.14/src/cairo-path-stroke.c:380
#6  0xb77f1165 in _cairo_stroker_add_leading_cap (stroker=0x0,
    face=<value optimized out>)
    at /build/buildd/libcairo-1.3.14/src/cairo-path-stroke.c:451
#7  0xb77f1195 in _cairo_stroker_add_caps (stroker=0xbfeba0bc)
    at /build/buildd/libcairo-1.3.14/src/cairo-path-stroke.c:483
#8  0xb77f159c in _cairo_path_fixed_stroke_to_traps (path=0x84260f8,
    stroke_style=0x8418a80, ctm=0x8418b1c, ctm_inverse=0x8418b4c,
    tolerance=0.10000000000000001, traps=0xbfeba1e0)
    at /build/buildd/libcairo-1.3.14/src/cairo-path-stroke.c:999
#9  0xb77eb55d in _cairo_gstate_stroke_extents (gstate=0x8418a70,
    path=0x84260f8, x1=0xbfeba2c8, y1=0xbfeba2d0, x2=0xbfeba2d8, y2=0xbfeba2e0)
    at /build/buildd/libcairo-1.3.14/src/cairo-gstate.c:1098
#10 0xb77e3a72 in cairo_stroke_extents (cr=0x84260f0, x1=0xbfeba2c8,
    y1=0x4d2e, x2=0x6, y2=0xbfeba2e0)
    at /build/buildd/libcairo-1.3.14/src/cairo.c:2084
#11 0xb5bea144 in ?? () from /usr/lib/librsvg-2.so.2
#12 0x084260f0 in ?? ()
#13 0xbfeba2c8 in ?? ()
#14 0xbfeba2d0 in ?? ()
#15 0xbfeba2d8 in ?? ()
#16 0xbfeba2e0 in ?? ()
#17 0x00000340 in ?? ()
#18 0xbfeba2a8 in ?? ()
#19 0xb754be52 in pow () from /lib/tls/i686/cmov/libm.so.6
#20 0xb5be4ffe in ?? () from /usr/lib/librsvg-2.so.2
#21 0x083f6e58 in ?? ()
#22 0x083e2920 in ?? ()
#23 0x08268c60 in ?? ()
#24 0xb5bef6d8 in ?? () from /usr/lib/librsvg-2.so.2
#25 0x08412528 in ?? ()
#26 0x083f6e58 in ?? ()
#27 0xbfeba3c8 in ?? ()
#28 0xb5bdaadb in ?? () from /usr/lib/librsvg-2.so.2
#29 0x083f6e58 in ?? ()
#30 0x08412740 in ?? ()
#31 0x00000000 in ?? ()

(gdb) info registers
eax            0x0      0
ecx            0x4d2e   19758
edx            0x6      6
ebx            0x4d2e   19758
esp            0xbfeb9dc0       0xbfeb9dc0
ebp            0xbfeb9dd8       0xbfeb9dd8
esi            0xbfeb9e78       -1075077512
edi            0xb7525ff4       -1219338252
eip            0xb7eed410       0xb7eed410 <__kernel_vsyscall+16>
eflags         0x200206 [ PF IF ID ]
cs             0x73     115
ss             0x7b     123
ds             0x7b     123
es             0x7b     123
fs             0x0      0
gs             0x33     51


(gdb) thread apply all backtrace

Thread 1 (Thread -1226590528 (LWP 19758)):
#0  0xb7eed410 in __kernel_vsyscall ()
#1  0xb7412df0 in raise () from /lib/tls/i686/cmov/libc.so.6
#2  0xb7414641 in abort () from /lib/tls/i686/cmov/libc.so.6
#3  0xb740c43b in __assert_fail () from /lib/tls/i686/cmov/libc.so.6
#4  0xb77f27af in _cairo_pen_find_active_cw_vertex_index (pen=0xbfeba0d4,
    slope=0xbfeb9ff0, active=0xbfeb9ff8)
    at /build/buildd/libcairo-1.3.14/src/cairo-pen.c:323
#5  0xb77f0ef4 in _cairo_stroker_add_cap (stroker=0xbfeba0bc, f=0xbfeba020)
    at /build/buildd/libcairo-1.3.14/src/cairo-path-stroke.c:380
#6  0xb77f1165 in _cairo_stroker_add_leading_cap (stroker=0x0,
    face=<value optimized out>)
    at /build/buildd/libcairo-1.3.14/src/cairo-path-stroke.c:451
#7  0xb77f1195 in _cairo_stroker_add_caps (stroker=0xbfeba0bc)
    at /build/buildd/libcairo-1.3.14/src/cairo-path-stroke.c:483
#8  0xb77f159c in _cairo_path_fixed_stroke_to_traps (path=0x84260f8,
    stroke_style=0x8418a80, ctm=0x8418b1c, ctm_inverse=0x8418b4c,
    tolerance=0.10000000000000001, traps=0xbfeba1e0)
    at /build/buildd/libcairo-1.3.14/src/cairo-path-stroke.c:999
#9  0xb77eb55d in _cairo_gstate_stroke_extents (gstate=0x8418a70,
    path=0x84260f8, x1=0xbfeba2c8, y1=0xbfeba2d0, x2=0xbfeba2d8, y2=0xbfeba2e0)
    at /build/buildd/libcairo-1.3.14/src/cairo-gstate.c:1098
#10 0xb77e3a72 in cairo_stroke_extents (cr=0x84260f0, x1=0xbfeba2c8,
    y1=0x4d2e, x2=0x6, y2=0xbfeba2e0)
    at /build/buildd/libcairo-1.3.14/src/cairo.c:2084
#11 0xb5bea144 in ?? () from /usr/lib/librsvg-2.so.2
#12 0x084260f0 in ?? ()
#13 0xbfeba2c8 in ?? ()
#14 0xbfeba2d0 in ?? ()
#15 0xbfeba2d8 in ?? ()
#16 0xbfeba2e0 in ?? ()
#17 0x00000340 in ?? ()
#18 0xbfeba2a8 in ?? ()
#19 0xb754be52 in pow () from /lib/tls/i686/cmov/libm.so.6
#20 0xb5be4ffe in ?? () from /usr/lib/librsvg-2.so.2
#21 0x083f6e58 in ?? ()
#22 0x083e2920 in ?? ()
#23 0x08268c60 in ?? ()
#24 0xb5bef6d8 in ?? () from /usr/lib/librsvg-2.so.2
#25 0x08412528 in ?? ()
#26 0x083f6e58 in ?? ()
#27 0xbfeba3c8 in ?? ()
#28 0xb5bdaadb in ?? () from /usr/lib/librsvg-2.so.2
#29 0x083f6e58 in ?? ()
#30 0x08412740 in ?? ()
#31 0x00000000 in ?? ()