Janus crash on audioroom destroy

gistfile1.txt

[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `--config /opt/janus/etc/janus/janus.cfg --configs-folder=/opt/janus/etc/janus -'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x000000000043cda5 in janus_push_event (handle=0x9c090090026f80, 
    plugin=0x7fa49059f320 <janus_audiobridge_plugin>, transaction=0x0, 
    message=0x7fa48c176160 "{\n   \"audiobridge\": \"destroyed\",\n   \"room\": 1471505503\n}", 
    sdp_type=0x0, sdp=0x0) at janus.c:3499
3499            if(!handle || handle->stopped)
(gdb) bt
#0  0x000000000043cda5 in janus_push_event (handle=0x9c090090026f80, 
    plugin=0x7fa49059f320 <janus_audiobridge_plugin>, transaction=0x0, 
    message=0x7fa48c176160 "{\n   \"audiobridge\": \"destroyed\",\n   \"room\": 1471505503\n}", 
    sdp_type=0x0, sdp=0x0) at janus.c:3499
#1  0x00007fa490394b18 in janus_audiobridge_handle_message (handle=<optimized out>, 
    transaction=0x7fa48c0c6500 "", 
    message=0x7fa48c09b230 "{\n   \"request\": \"destroy\",\n   \"room\": 1471505503\n}", 
    sdp_type=0x0, sdp=0x0) at plugins/janus_audiobridge.c:1222
#2  0x0000000000434d72 in janus_process_incoming_request (source=source@entry=0x7fa4667f3970, 
    root=root@entry=0x7fa48c1a4790) at janus.c:1513
#3  0x0000000000439279 in janus_ws_handler (cls=<optimized out>, connection=0x7fa48c051a00, 
    url=0x7fa48c000bd5 "/janus/1/2447247724", method=0x7fa48c000bd0 "POST", 
    version=<optimized out>, upload_data=0x0, upload_data_size=0x7fa4667f3b98, 
    ptr=0x7fa48c051a58) at janus.c:848
#4  0x00007fa4a44a683d in ?? () from /usr/lib/x86_64-linux-gnu/libmicrohttpd.so.10
#5  0x00007fa4a44a7a40 in ?? () from /usr/lib/x86_64-linux-gnu/libmicrohttpd.so.10
#6  0x00007fa4a44aa44b in ?? () from /usr/lib/x86_64-linux-gnu/libmicrohttpd.so.10
#7  0x00007fa4a2bf4182 in start_thread (arg=0x7fa4667f4700) at pthread_create.c:312
#8  0x00007fa4a292147d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111