Core was generated by `/private/samba/sbin/smbd -D'.
Program terminated with signal 6, Aborted.
#0  0xff04e6bc in _lwp_kill () from /lib/libc.so.1
(gdb) bt
#0  0xff04e6bc in _lwp_kill () from /lib/libc.so.1
#1  0xfefe7a18 in raise () from /lib/libc.so.1
#2  0xfefc2958 in abort () from /lib/libc.so.1
#3  0x00624808 in dump_core () at lib/fault.c:391
#4  0x0063fc20 in smb_panic (why=0xd29e80 "internal error") at lib/util.c:1133
#5  0x00623d10 in fault_report (sig=11) at lib/fault.c:53
#6  0x00623d28 in sig_fault (sig=11) at lib/fault.c:76
#7  <signal handler called>
#8  0xfefb2cb0 in strlen () from /lib/libc.so.1
#9  0xff01f0e4 in _ndoprnt () from /lib/libc.so.1
#10 0xff021888 in vsnprintf () from /lib/libc.so.1
#11 0xff01d18c in vasprintf () from /lib/libc.so.1
#12 0x00623274 in dbgtext (format_str=0xbb54c8 "register_existing_vuid: User name: %s\tReal name: %s\n")
    at ../lib/util/debug.c:1002
#13 0x000c406c in register_existing_vuid (sconn=0xe5b810, vuid=100, session_info=0x0, response_blob=
      {data = 0x0, length = 0}, smb_name=0xc3e2b0 "") at smbd/password.c:295
#14 0x00114ea8 in reply_spnego_ntlmssp (req=0xe79468, vuid=100, auth_ntlmssp_state=0xe63e90, 
    ntlmssp_blob=0xffbfeda0, nt_status=0, OID=0x0, wrap=true) at smbd/sesssetup.c:512
#15 0x00115b1c in reply_spnego_auth (req=0xe79468, vuid=100, blob1=Cannot access memory at address 0x0
) at smbd/sesssetup.c:806
#16 0x001171d4 in reply_sesssetup_and_X_spnego (req=0xe79468) at smbd/sesssetup.c:1192
#17 0x00117c1c in reply_sesssetup_and_X (req=0xe79468) at smbd/sesssetup.c:1354
#18 0x00180284 in switch_message (type=115 's', req=0xe79468, size=286) at smbd/process.c:1574
#19 0x001804ec in construct_reply (sconn=0xe5b810, inbuf=0x0, size=286, unread_bytes=0, seqnum=0, encrypted=false, 
    deferred_pcd=0x0) at smbd/process.c:1610
#20 0x00180980 in process_smb (sconn=0xe5b810, inbuf=0xe79318 "", nread=286, unread_bytes=0, seqnum=0, 
    encrypted=false, deferred_pcd=0x0) at smbd/process.c:1688
#21 0x00182940 in smbd_server_connection_read_handler (conn=0xe5b810, fd=33) at smbd/process.c:2317
#22 0x001829f4 in smbd_server_connection_handler (ev=0xe5b798, fde=0xe63618, flags=1, private_data=0xe5b810)
    at smbd/process.c:2334
#23 0x0065c390 in run_events_poll (ev=0xe5b798, pollrtn=1, pfds=0xe64a28, num_pfds=2) at lib/events.c:286
#24 0x0017f26c in smbd_server_connection_loop_once (conn=0xe5b810) at smbd/process.c:1017
#25 0x0018610c in smbd_process (sconn=0xe5b810) at smbd/process.c:3158
#26 0x00b8522c in smbd_accept_connection (ev=0xe5b798, fde=0xe6f030, flags=1, private_data=0xe6efe0)
    at smbd/server.c:511
#27 0x0065c390 in run_events_poll (ev=0xe5b798, pollrtn=1, pfds=0xe60718, num_pfds=5) at lib/events.c:286
#28 0x0065c6e4 in s3_event_loop_once (ev=0xe5b798, location=0xde7990 "smbd/server.c:844") at lib/events.c:349
#29 0x0065de80 in _tevent_loop_once (ev=0xe5b798, location=0xde7990 "smbd/server.c:844")
    at ../lib/tevent/tevent.c:494
#30 0x00b864c0 in smbd_parent_loop (parent=0xe71698) at smbd/server.c:844
#31 0x00b87f98 in main (argc=2, argv=0xffbffcc4) at smbd/server.c:1326