https websockets not working in 2.5 or 2.6

% gdb --args ./x86_64-softmmu/qemu-system-x86_64 -vnc 0.0.0.0:1,tls,x509=/etc/pki/libvirt-le,websocket=5701

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Reading symbols from ./x86_64-softmmu/qemu-system-x86_64...done.
(gdb) run
Starting program: /home/ben/qemu/qemu-2.6.0/x86_64-softmmu/qemu-system-x86_64 -vnc 0.0.0.0:1,tls,x509=/etc/pki/libvirt-le,websocket=5701
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[New Thread 0x7fffe16f6700 (LWP 12767)]
[New Thread 0x7fffde2d4700 (LWP 12768)]
[New Thread 0x7fffd3fff700 (LWP 12769)]
Initializing VNC server with x509 no auth
Client sioc=0x55555874d6b0 ws=1 auth=1 subauth=0
New client on socket 0x55555874d6b0
vnc_set_share_mode/0x55555874d6b0: undefined -> connecting
TLS Websocket connection required
Start TLS WS handshake process
Handshake failed TLS handshake failed: The TLS connection was non-properly terminated.
Closing down client sock: protocol error
vnc_set_share_mode/0x55555779f510: connecting -> disconnected
Client sioc=0x55555873c6a0 ws=1 auth=1 subauth=0
New client on socket 0x55555873c6a0
vnc_set_share_mode/0x55555873c6a0: undefined -> connecting
TLS Websocket connection required
Start TLS WS handshake process
TLS handshake complete, starting websocket handshake
Websocket negotiate starting
Websock handshake complete, starting VNC protocol
Write Plain: Pending output 0x555557b91c60 size 4096 offset 12. Wait SSF 0
Wrote wire 0x555557b91c60 12 -> 12

Thread 1 "qemu-system-x86" received signal SIGSEGV, Segmentation fault.
0x0000000000000001 in ?? ()
(gdb) thread apply all bt

Thread 4 (Thread 0x7fffd3fff700 (LWP 12769)):
#0 0x00007fffef35a09f in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0
#1 0x0000555555a20bd9 in qemu_cond_wait (cond=cond@entry=0x5555587267e0,
    mutex=mutex@entry=0x555558726810) at util/qemu-thread-posix.c:123
#2 0x00005555559770ab in vnc_worker_thread_loop (queue=queue@entry=0x5555587267e0)
    at ui/vnc-jobs.c:228
#3 0x00005555559775e8 in vnc_worker_thread (arg=0x5555587267e0) at ui/vnc-jobs.c:335
#4 0x00007fffef354474 in start_thread () from /usr/lib/libpthread.so.0
#5 0x00007fffea43c69d in clone () from /usr/lib/libc.so.6

Thread 3 (Thread 0x7fffde2d4700 (LWP 12768)):
#0 0x00007fffef35a09f in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0
#1 0x0000555555a20bd9 in qemu_cond_wait (cond=<optimized out>,
---Type <return> to continue, or q <return> to quit---
    emu_global_mutex>) at util/qemu-thread-posix.c:123
#2 0x0000555555715edf in qemu_tcg_wait_io_event (cpu=0x5555564ee840) at /home/ben/qemu/qemu-2.6.0/cpus.c:1015
#3 qemu_tcg_cpu_thread_fn (arg=<optimized out>) at /home/ben/qemu/qemu-2.6.0/cpus.c:1161
#4 0x00007fffef354474 in start_thread () from /usr/lib/libpthread.so.0
#5 0x00007fffea43c69d in clone () from /usr/lib/libc.so.6

Thread 2 (Thread 0x7fffe16f6700 (LWP 12767)):
#0 0x00007fffea438229 in syscall () from /usr/lib/libc.so.6
#1 0x0000555555a20ee8 in futex_wait (val=<optimized out>, ev=<optimized out>) at util/qemu-thread-posix.c:292
#2 qemu_event_wait (ev=ev@entry=0x55555641ece4 <rcu_call_ready_event>) at util/qemu-thread-posix.c:399
#3 0x0000555555a2f2ae in call_rcu_thread (opaque=<optimized out>) at util/rcu.c:250
#4 0x00007fffef354474 in start_thread () from /usr/lib/libpthread.so.0
#5 0x00007fffea43c69d in clone () from /usr/lib/libc.so.6

Thread 1 (Thread 0x7ffff7f5bb00 (LWP 12763)):
#0 0x0000000000000001 in ?? ()
#1 0x00005555559efb53 in qio_task_free (task=0x555558212140) at io/task.c:58
#2 0x00005555559efd89 in qio_task_complete (task=task@entry=0x555558212140) at io/task.c:145
#3 0x00005555559ef5aa in qio_channel_websock_handshake_send (ioc=0x55555873c6a0, condition=<optimized out>,
    user_data=0x555558212140) at io/channel-websock.c:289
#4 0x00007fffecf59c8a in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#5 0x000055555598a6b3 in glib_pollfds_poll () at main-loop.c:213
#6 os_host_main_loop_wait (timeout=<optimized out>) at main-loop.c:258
#7 main_loop_wait (nonblocking=<optimized out>) at main-loop.c:506
#8 0x00005555556e1fbd in main_loop () at vl.c:1934
#9 main (argc=<optimized out>, argv=<optimized out>, envp=<optimized out>) at vl.c:4656