Comment 5 for bug 600622

Problem readily reproducible printing a blank page from Inkscape.

Stack frames 3-6 weren't decoded, so I've included them here:

 #0 0x00007f9929394b85 in *__GI_raise (sig=<value optimized out>)
     at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
         pid = <value optimized out>
         selftid = <value optimized out>
 #1 0x00007f9929398655 in *__GI_abort () at abort.c:121
         act = {__sigaction_handler = {sa_handler = 0, sa_sigaction = 0},
           sa_mask = {__val = {18446744073709551615 <repeats 16 times>}},
           sa_flags = 0, sa_restorer = 0}
         sigs = {__val = {32, 0 <repeats 15 times>}}
 #2 0x00007f992938da61 in *__GI___assert_fail (
     assertion=0x7f992e4be18d "! surface->finished",
     file=<value optimized out>, line=337,
     function=0x7f992e4bf4a0 "_cairo_surface_begin_modification")
     at assert.c:81
         buf = 0x7a67600 "inkscape: /build/buildd/cairo-1.9.10/src/cairo-surface.c:337: _cairo_surface_begin_modification: A
 #3 0x00007f992e46a618 in _cairo_surface_begin_modification (
     surface=0x799e4b0) at /build/buildd/cairo-1.9.10/src/cairo-surface.c:337
         __PRETTY_FUNCTION__ = "_cairo_surface_begin_modification"
 #4 0x00007f992e46aa85 in *INT_cairo_surface_show_page (surface=0x799e4b0)
     at /build/buildd/cairo-1.9.10/src/cairo-surface.c:2349
 No locals.
 #5 0x00007f992e4430d0 in _cairo_gstate_show_page (gstate=0x7f992e6dda68)
     at /build/buildd/cairo-1.9.10/src/cairo-gstate.c:1363
 No locals.
 #6 0x00007f992e43a476 in cairo_show_page (cr=0x7f992e6dd8a0)
     at /build/buildd/cairo-1.9.10/src/cairo.c:2437
         status = <value optimized out>