#0  0xb6c7ec4e in __waitpid_nocancel () from /lib/libc.so.6
No symbol table info available.
#1  0xb6c17c48 in do_system () from /lib/libc.so.6
No symbol table info available.
#2  0xb773a9db in system () from /lib/libpthread.so.0
No symbol table info available.
#3  0xb719d74d in smb_panic_s3 (why=0xb771e78b "internal error") at ../source3/lib/util.c:823
        cmd = 0x8a55638 "/etc/samba/panic-action 5412"
        result = <optimized out>
        __FUNCTION__ = "smb_panic_s3"
#4  0xb770cfa6 in smb_panic (why=why@entry=0xb771e78b "internal error") at ../lib/util/fault.c:159
No locals.
#5  0xb770d343 in fault_report (sig=11) at ../lib/util/fault.c:77
        counter = 1
#6  sig_fault (sig=11) at ../lib/util/fault.c:88
No locals.
#7  <signal handler called>
No symbol table info available.
#8  0xb6c211ae in vfprintf () from /lib/libc.so.6
No symbol table info available.
#9  0xb6ccd871 in __vasprintf_chk () from /lib/libc.so.6
No symbol table info available.
#10 0xb770bbf7 in vasprintf (__ap=0xbfefb424
+"EEEEEEEE&\233*\267\260\342\243\b`\213\245\bh\213\245\b\354\341\243\b\350\341\243\b\370\341\243\bp\213\245\b\230\264\357\277w+Ŷ\364\357<
+\267\270٣\b\260\342\243\b\240\343\243\bt\265\357\277p\213\245\b\370\341\243\b\350\341\243\b\354\341\243\b\"\001\200\266\270٣\b\003",
+__fmt=__fmt@entry=0xb6800f94 "../auth/ntlmssp/ntlmssp_server.c:455: Checking NTLMSSP password for %s\\%s failed: %s\n",
+__ptr=0xbfefb3f8) at /usr/include/bits/stdio2.h:210
No locals.
#11 dbgtext (format_str=format_str@entry=0xb6800f94 "../auth/ntlmssp/ntlmssp_server.c:455: Checking NTLMSSP password for %s\\%s failed:
+%s\n") at ../lib/util/debug.c:1056
        ap = 0xbfefb424 "EEEEEEEE&\233*\267\260\342\243\b`\213\245\bh\213\245\b\354\341\243\b\350\341\243\b\370\341\243\bp\213\245\b\230\
+264\357\277w+Ŷ\364\357<\267\270٣\b\260\342\243\b\240\343\243\bt\265\357\277p\213\245\b\370\341\243\b\350\341\243\b\354\341\243\b\"\001\2
+00\266\270٣\b\003"
        msgbuf = 0x0
        ret = true
        res = 0
#12 0xb67f346b in ntlmssp_server_check_password (lm_session_key=0x8a58b68, user_session_key=0x8a58b60, mem_ctx=0x8a58b60,
+gensec_ntlmssp=0x8a3e2b0, gensec_security=0x8a3e3a0) at ../auth/ntlmssp/ntlmssp_server.c:455
        ntlmssp_state = <optimized out>
        auth_context = 0x8a3d9b8
        nt_status = {v = 3221225578}
        user_info = 0x8a41538
#13 gensec_ntlmssp_server_auth (gensec_security=0x8a3e3a0, out_mem_ctx=0x8a3ebd8, in=..., out=0xbfefb68c) at
+../auth/ntlmssp/ntlmssp_server.c:645
        gensec_ntlmssp = 0x8a3e2b0
        state = 0x8a58b60
        nt_status = <optimized out>
#14 0xb67f0c85 in gensec_ntlmssp_update (gensec_security=0x8a3e3a0, out_mem_ctx=0x8a3ebd8, ev=0x8a1aff8, input=..., out=0xbfefb68c) at
+../auth/ntlmssp/ntlmssp.c:162
        gensec_ntlmssp = <optimized out>
        ntlmssp_state = 0x0
        status = {v = 0}
        i = <optimized out>
#15 0xbfefb5dc in ?? ()
No symbol table info available.
#16 0x000001f4 in ?? ()
No symbol table info available.

this is fixed with 1dcd75df4941d7032a66d3fbb86ac76964444a3f in master, which needs to be picked to 4.0