DBGvpp# show ver
vvpp v17.04-rc0~121-g46f133d built by wdec on devstack-vm at Die Jan 17 17:53:39 CET 2017

create vhost-user socket /tmp/a1
set interface state VirtualEthernet0/0/0 up
delete vhost-user VirtualEthernet0/0/0

0: /home/wdec/vpp/build-data/../src/vnet/devices/virtio/vhost-user.c:2263 (vhost_user_interface_admin_up_down) assertion `! pool_is_free (vum->vhost_user_interfaces, _e)' fails
Failed to save post-mortem API trace to /tmp/api_post_mortem.47905

TThread 1 "vpp_main" received signal SIGABRT, Aborted.
0x00007ffff6041418 in __GI_raise (sig=sig@entry=6)
at ../sysdeps/unix/sysv/linux/raise.c:54
54 ../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) bt
#0 0x00007ffff6041418 in __GI_raise (sig=sig@entry=6)
at ../sysdeps/unix/sysv/linux/raise.c:54
#1 0x00007ffff604301a in __GI_abort () at abort.c:89
#2 0x00000000004071b7 in os_panic ()
at /home/wdec/vpp/build-data/../src/vpp/vnet/main.c:269
#3 0x00007ffff6620fc5 in debugger ()
at /home/wdec/vpp/build-data/../src/vppinfra/error.c:84
#4 0x00007ffff66213cd in _clib_error (how_to_die=2, function_name=0x0,
line_number=0, fmt=0x7ffff73c98e0 "%s:%d (%s) assertion `%s' fails")
at /home/wdec/vpp/build-data/../src/vppinfra/error.c:143
#5 0x00007ffff7251f97 in vhost_user_interface_admin_up_down (
vnm=0x6e8fc0 <vnet_main>, hw_if_index=1, flags=0)
at /home/wdec/vpp/build-data/../src/vnet/devices/virtio/vhost-user.c:2263
#6 0x00007ffff6d4e514 in vnet_sw_interface_set_flags_helper (
vnm=0x6e8fc0 <vnet_main>, sw_if_index=1, flags=0, helper_flags=0)
at /home/wdec/vpp/build-data/../src/vnet/interface.c:493
#7 0x00007ffff6d4e689 in vnet_sw_interface_set_flags (
vnm=0x6e8fc0 <vnet_main>, sw_if_index=1, flags=0)
at /home/wdec/vpp/build-data/../src/vnet/interface.c:540