(gdb) bt
#0 0xb77c8424 in __kernel_vsyscall ()
#1 0xb66fcc58 in raise (sig=11) at
../nptl/sysdeps/unix/sysv/linux/pt-raise.c:42
#2 0x0811946b in terminate_due_to_signal (sig=11, backtrace_limit=40) at
emacs.c:377
#3 0x08130e77 in handle_fatal_signal (sig=11) at sysdep.c:1624
#4 0x08130ef6 in deliver_thread_signal (handler=0x8130e60
<handle_fatal_signal>, sig=11) at sysdep.c:1598
#5 deliver_fatal_thread_signal (sig=11) at sysdep.c:1636
#6 <signal handler called>
#7 0xb743b2c8 in XRenderHasDepths (dpy=0xacc10e0) at
/var/tmp/portage/x11-libs/libXrender-0.9.7/work/libXrender-0.9.7/src/Xrender.c:126
#8 XRenderExtAddDisplay (dpy=0xacc10e0, extinfo=<optimized out>,
ext_name=<optimized out>) at
/var/tmp/portage/x11-libs/libXrender-0.9.7/work/libXrender-0.9.7/src/Xrender.c:201
#9 XRenderFindDisplay (dpy=0xacc10e0) at
/var/tmp/portage/x11-libs/libXrender-0.9.7/work/libXrender-0.9.7/src/Xrender.c:288
#10 0xb7437a1f in XRenderFreeGlyphSet (dpy=0xacc10e0, glyphset=73400700) at
/var/tmp/portage/x11-libs/libXrender-0.9.7/work/libXrender-0.9.7/src/Glyph.c:71
#11 0xb742b3bc in XftFontDestroy (dpy=0xacc10e0, public=0xb61a908) at
/var/tmp/portage/x11-libs/libXft-2.3.1/work/libXft-2.3.1/src/xftfreetype.c:1046
#12 0x081e5e81 in xftfont_close (font=0xb88caf8) at xftfont.c:498
#13 0x0816e287 in cleanup_vector (vector=<optimized out>) at alloc.c:2880
#14 cleanup_vector (vector=<optimized out>) at alloc.c:2875
#15 0x08172b45 in sweep_vectors () at alloc.c:2917
#16 gc_sweep () at alloc.c:6619
#17 Fgarbage_collect () at alloc.c:5542