Program received signal SIGSEGV, Segmentation fault.
0x00007ffb1868731c in object_class_dynamic_cast (class=0x7ffb1a7e4b90, typename=typename@entry=0x7ffb18847463 "object") at qom/object.c:525
525	    if (type->class->interfaces &&
(gdb) bt
#0  0x00007ffb1868731c in object_class_dynamic_cast (class=0x7ffb1a7e4b90, typename=typename@entry=0x7ffb18847463 "object")
    at qom/object.c:525
#1  0x00007ffb18688f19 in object_dynamic_cast (typename=0x7ffb18847463 "object", obj=0x7ffb1a791f80) at qom/object.c:456
#2  object_resolve_abs_path (parent=<optimized out>, parts=parts@entry=0x7ffb1aa0d800, typename=typename@entry=0x7ffb18847463 "object", 
    index=index@entry=1) at qom/object.c:1244
#3  0x00007ffb186890b8 in object_resolve_path_type (path=<optimized out>, typename=0x7ffb18847463 "object", ambiguous=0x7fffb7e1ca67)
    at qom/object.c:1312
#4  0x00007ffb1868431f in qmp_qom_list (path=0x7ffb1aa0c530 "//machine/i440fx/pci.0/child[14]", errp=errp@entry=0x7fffb7e1caa0) at qmp.c:201
#5  0x00007ffb1867f385 in qmp_marshal_input_qom_list (mon=<optimized out>, qdict=<optimized out>, ret=0x7fffb7e1cb20) at qmp-marshal.c:2490
#6  0x00007ffb18732017 in qmp_call_cmd (cmd=<optimized out>, params=0x7ffb1aa0c620, mon=0x7ffb1a168b40)
    at /usr/src/debug/qemu-2.0.0-rc2/monitor.c:4760
#7  handle_qmp_command (parser=<optimized out>, tokens=<optimized out>) at /usr/src/debug/qemu-2.0.0-rc2/monitor.c:4826
#8  0x00007ffb187d3002 in json_message_process_token (lexer=0x7ffb1a438e70, token=0x7ffb1aa02de0, type=JSON_OPERATOR, x=96, y=15)
    at qobject/json-streamer.c:87
#9  0x00007ffb187e7f6f in json_lexer_feed_char (lexer=lexer@entry=0x7ffb1a438e70, ch=<optimized out>, flush=flush@entry=false)
    at qobject/json-lexer.c:303
#10 0x00007ffb187e8086 in json_lexer_feed (lexer=0x7ffb1a438e70, buffer=<optimized out>, size=<optimized out>) at qobject/json-lexer.c:356
#11 0x00007ffb187d3201 in json_message_parser_feed (parser=<optimized out>, buffer=<optimized out>, size=<optimized out>)
    at qobject/json-streamer.c:110
#12 0x00007ffb18730443 in monitor_control_read (opaque=<optimized out>, buf=<optimized out>, size=<optimized out>)
    at /usr/src/debug/qemu-2.0.0-rc2/monitor.c:4847
#13 0x00007ffb1866fca9 in qemu_chr_be_write (len=<optimized out>, buf=0x7fffb7e1cd00 "}\253\025\032\373\177", s=0x7ffb1a15a860)
    at qemu-char.c:165
#14 tcp_chr_read (chan=<optimized out>, cond=<optimized out>, opaque=0x7ffb1a15a860) at qemu-char.c:2503
#15 0x00007ffb176fb316 in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#16 0x00007ffb1863ec18 in glib_pollfds_poll () at main-loop.c:190
#17 os_host_main_loop_wait (timeout=<optimized out>) at main-loop.c:235
#18 main_loop_wait (nonblocking=<optimized out>) at main-loop.c:484
#19 0x00007ffb184e53c6 in main_loop () at vl.c:2052
#20 main (argc=<optimized out>, argv=<optimized out>, envp=<optimized out>) at vl.c:4516