Program received signal SIGABRT, Aborted.
[Switching to Thread 0x7f1058bfe700 (LWP 28583)]
0x00007f1064969535 in raise () from /lib64/libc.so.6
(gdb) thread apply all bt

Thread 8 (Thread 0x7f0f4abff700 (LWP 28634)):
#0  0x00007f106751eff1 in sem_timedwait () from /lib64/libpthread.so.0
#1  0x00007f106b00ee8b in qemu_sem_timedwait (address@hidden, address@hidden) at /var/tmp/portage/app-emulation/qemu-2.1.0/work/qemu-2.1.0/util/qemu-thread-posix.c:257
#2  0x00007f106afb0dce in worker_thread (opaque=0x7f106ba40870) at /var/tmp/portage/app-emulation/qemu-2.1.0/work/qemu-2.1.0/thread-pool.c:97
#3  0x00007f1067518f3a in start_thread () from /lib64/libpthread.so.0
#4  0x00007f1064a1ec3d in clone () from /lib64/libc.so.6

Thread 7 (Thread 0x7f105a6e2700 (LWP 28579)):
#0  0x00007f1064a16727 in ioctl () from /lib64/libc.so.6
#1  0x00007f106ad714d9 in kvm_vcpu_ioctl (address@hidden, address@hidden) at /var/tmp/portage/app-emulation/qemu-2.1.0/work/qemu-2.1.0/kvm-all.c:1845
#2  0x00007f106ad71615 in kvm_cpu_exec (address@hidden) at /var/tmp/portage/app-emulation/qemu-2.1.0/work/qemu-2.1.0/kvm-all.c:1714
#3  0x00007f106ad5cd2c in qemu_kvm_cpu_thread_fn (arg=0x7f106b9b7970) at /var/tmp/portage/app-emulation/qemu-2.1.0/work/qemu-2.1.0/cpus.c:874
#4  0x00007f1067518f3a in start_thread () from /lib64/libpthread.so.0
#5  0x00007f1064a1ec3d in clone () from /lib64/libc.so.6

Thread 6 (Thread 0x7f1059ee1700 (LWP 28580)):
#0  0x00007f1064a16727 in ioctl () from /lib64/libc.so.6
#1  0x00007f106ad714d9 in kvm_vcpu_ioctl (address@hidden, address@hidden) at /var/tmp/portage/app-emulation/qemu-2.1.0/work/qemu-2.1.0/kvm-all.c:1845
#2  0x00007f106ad71615 in kvm_cpu_exec (address@hidden) at /var/tmp/portage/app-emulation/qemu-2.1.0/work/qemu-2.1.0/kvm-all.c:1714
#3  0x00007f106ad5cd2c in qemu_kvm_cpu_thread_fn (arg=0x7f106b9f4120) at /var/tmp/portage/app-emulation/qemu-2.1.0/work/qemu-2.1.0/cpus.c:874
#4  0x00007f1067518f3a in start_thread () from /lib64/libpthread.so.0
#5  0x00007f1064a1ec3d in clone () from /lib64/libc.so.6

Thread 4 (Thread 0x7f1058bfe700 (LWP 28583)):
#0  0x00007f1064969535 in raise () from /lib64/libc.so.6
#1  0x00007f106496a9b8 in abort () from /lib64/libc.so.6
#2  0x00007f10649a9b9b in __libc_message () from /lib64/libc.so.6
#3  0x00007f10649af876 in malloc_printerr () from /lib64/libc.so.6
#4  0x00007f10649b0623 in _int_free () from /lib64/libc.so.6
#5  0x00007f106ad81f6b in virtio_blk_free_request (req=0x7f106b8ef6a0) at /var/tmp/portage/app-emulation/qemu-2.1.0/work/qemu-2.1.0/hw/block/virtio-blk.c:43
#6  0x00007f106afb8a72 in bdrv_co_em_bh (opaque=0x7f0f4400dc30) at /var/tmp/portage/app-emulation/qemu-2.1.0/work/qemu-2.1.0/block.c:4666
#7  0x00007f106afb05a7 in aio_bh_poll (address@hidden) at /var/tmp/portage/app-emulation/qemu-2.1.0/work/qemu-2.1.0/async.c:81
#8  0x00007f106afc1d15 in aio_poll (ctx=0x7f106bb2ba90, address@hidden) at /var/tmp/portage/app-emulation/qemu-2.1.0/work/qemu-2.1.0/aio-posix.c:188
#9  0x00007f106ae357c7 in iothread_run (opaque=0x7f106bb2b918) at /var/tmp/portage/app-emulation/qemu-2.1.0/work/qemu-2.1.0/iothread.c:41
#10 0x00007f1067518f3a in start_thread () from /lib64/libpthread.so.0
#11 0x00007f1064a1ec3d in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7f0f4b5ff700 (LWP 28584)):
#0  0x00007f106751cd0c in pthread_cond_wait () from /lib64/libpthread.so.0
#1  0x00007f106b00ecc9 in qemu_cond_wait (address@hidden, address@hidden) at /var/tmp/portage/app-emulation/qemu-2.1.0/work/qemu-2.1.0/util/qemu-thread-posix.c:135
#2  0x00007f106afab96b in vnc_worker_thread_loop (address@hidden) at /var/tmp/portage/app-emulation/qemu-2.1.0/work/qemu-2.1.0/ui/vnc-jobs.c:222
#3  0x00007f106afabd40 in vnc_worker_thread (arg=0x7f106bbbd0d0) at /var/tmp/portage/app-emulation/qemu-2.1.0/work/qemu-2.1.0/ui/vnc-jobs.c:323
#4  0x00007f1067518f3a in start_thread () from /lib64/libpthread.so.0
#5  0x00007f1064a1ec3d in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f106ac16980 (LWP 28561)):
#0  0x00007f1064a15116 in ppoll () from /lib64/libc.so.6
#1  0x00007f106afc0b29 in ppoll (__ss=0x0, __timeout=0x7fffb75c9a70, __nfds=<optimized out>, __fds=<optimized out>) at /usr/include/bits/poll2.h:77
#2  qemu_poll_ns (fds=<optimized out>, nfds=<optimized out>, address@hidden) at /var/tmp/portage/app-emulation/qemu-2.1.0/work/qemu-2.1.0/qemu-timer.c:319
#3  0x00007f106afbff14 in os_host_main_loop_wait (timeout=627345194) at /var/tmp/portage/app-emulation/qemu-2.1.0/work/qemu-2.1.0/main-loop.c:229
#4  main_loop_wait (nonblocking=<optimized out>) at /var/tmp/portage/app-emulation/qemu-2.1.0/work/qemu-2.1.0/main-loop.c:484
#5  0x00007f106ad2db9d in main_loop () at /var/tmp/portage/app-emulation/qemu-2.1.0/work/qemu-2.1.0/vl.c:2010
#6  main (argc=<optimized out>, argv=<optimized out>, envp=<optimized out>) at /var/tmp/portage/app-emulation/qemu-2.1.0/work/qemu-2.1.0/vl.c:4530