autobuild[sn-devel-144]: intermittent test failure detected

[autobuild]

The autobuild test system (on sn-devel-144) has detected an intermittent failing test in 
the current master tree.

The autobuild log of the failure is available here:

   https://git.samba.org/autobuild.flakey.sn-devel-144/2019-04-15-1330/flakey.log

The failure seems to be in the "samba-nt4" suite, whose build logs are available here:

   https://git.samba.org/autobuild.flakey.sn-devel-144/2019-04-15-1330/samba-nt4.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2019-04-15-1330/samba-nt4.stdout
  
The top commit at the time of the failure was:

commit a187b7ef8fe91d227aeda5a2d9d4400d43c9d4ef
Author: Volker Lendecke <vl at samba.org>
Date:   Wed Sep 19 17:42:51 2018 +0200

    smbd: Remove share_mode_lease and the leases array from share_mode_entry
    
    This also removes the temporary functions introduced during the patchset.
    
    Signed-off-by: Volker Lendecke <vl at samba.org>
    Reviewed-by: Christof Schmitt <cs at samba.org>
    
    Autobuild-User(master): Christof Schmitt <cs at samba.org>
    Autobuild-Date(master): Sun Apr 14 05:18:14 UTC 2019 on sn-devel-144

and the last 50 lines of the stdout log were:

[503(2077)/588 at 30m22s] samba3.rpc.lsa.lookupsids over ncacn_ip_tcp with [spnego,smb1,bigendian] (nt4_dc)
[504(2078)/588 at 30m23s] samba3.rpc.lsa.lookupsids over ncacn_ip_tcp with [spnego,smb1,connect,bigendian] (nt4_dc)
[505(2079)/588 at 30m23s] samba3.rpc.lsa.lookupsids over ncacn_ip_tcp with [spnego,smb1,packet,bigendian] (nt4_dc)
[506(2080)/588 at 30m24s] samba3.rpc.lsa.lookupsids over ncacn_ip_tcp with [spnego,smb1,sign,bigendian] (nt4_dc)
[507(2081)/588 at 30m24s] samba3.rpc.lsa.lookupsids over ncacn_ip_tcp with [spnego,smb1,seal,bigendian] (nt4_dc)
[508(2082)/588 at 30m24s] samba3.rpc.lsa.lookupsids over ncacn_ip_tcp with [spnego,smb2,bigendian] (nt4_dc)
[509(2083)/588 at 30m25s] samba3.rpc.lsa.lookupsids over ncacn_ip_tcp with [spnego,smb2,connect,bigendian] (nt4_dc)
[510(2084)/588 at 30m25s] samba3.rpc.lsa.lookupsids over ncacn_ip_tcp with [spnego,smb2,packet,bigendian] (nt4_dc)
[511(2085)/588 at 30m25s] samba3.rpc.lsa.lookupsids over ncacn_ip_tcp with [spnego,smb2,sign,bigendian] (nt4_dc)
[512(2086)/588 at 30m26s] samba3.rpc.lsa.lookupsids over ncacn_ip_tcp with [spnego,smb2,seal,bigendian] (nt4_dc)
[513(2087)/588 at 30m26s] samba3.rpc.epmapper over ncalrpc(nt4_dc:local)
[514(2092)/588 at 30m27s] samba3.rpc.fsrvp over ncacn_np(nt4_dc:local)
[515(2102)/588 at 30m43s] samba4.rpc.lsa.secrets on ncacn_np with with -k no --option=clientusespnego=yes(nt4_dc)
[516(2126)/588 at 30m48s] samba4.rpc.lsa.secrets on ncacn_np with with -k no --option=clientusespnego=yes --option=ntlmssp_client:128bit=no(nt4_dc)
[517(2150)/588 at 30m51s] samba4.rpc.lsa.secrets on ncacn_np with with -k no --option=clientusespnego=yes --option=ntlmssp_client:56bit=yes(nt4_dc)
[518(2174)/588 at 30m55s] samba4.rpc.lsa.secrets on ncacn_np with with -k no --option=clientusespnego=yes --option=ntlmssp_client:56bit=no(nt4_dc)
[519(2198)/588 at 30m59s] samba4.rpc.lsa.secrets on ncacn_np with with -k no --option=clientusespnego=yes --option=ntlmssp_client:128bit=no --option=ntlmssp_client:56bit=yes(nt4_dc)
[520(2222)/588 at 31m3s] samba4.rpc.lsa.secrets on ncacn_np with with -k no --option=clientusespnego=yes --option=ntlmssp_client:128bit=no --option=ntlmssp_client:56bit=no(nt4_dc)
[521(2246)/588 at 31m7s] samba4.rpc.lsa.secrets on ncacn_np with with -k no --option=clientusespnego=yes --option=clientntlmv2auth=yes(nt4_dc)
[522(2270)/588 at 31m11s] samba4.rpc.lsa.secrets on ncacn_np with with -k no --option=clientusespnego=yes --option=clientntlmv2auth=yes --option=ntlmssp_client:128bit=no(nt4_dc)
[523(2294)/588 at 31m15s] samba4.rpc.lsa.secrets on ncacn_np with with -k no --option=clientusespnego=yes --option=clientntlmv2auth=yes --option=ntlmssp_client:128bit=no --option=ntlmssp_client:56bit=yes(nt4_dc)
[524(2318)/588 at 31m18s] samba4.rpc.lsa.secrets on ncacn_np with with -k no --option=clientusespnego=no --option=clientntlmv2auth=yes(nt4_dc)
[525(2342)/588 at 31m22s] samba4.rpc.lsa.secrets on ncacn_np with with -k no --option=gensec:spnego=no --option=clientntlmv2auth=yes(nt4_dc)
[526(2366)/588 at 31m26s] samba4.rpc.lsa.secrets on ncacn_np with with -k no --option=clientusespnego=no(nt4_dc)
[527(2390)/588 at 31m30s] samba.blackbox.pdbtest(nt4_dc)(nt4_dc:local)
[528(2408)/588 at 31m35s] samba4.rpc.echo on ncacn_np with object(nt4_dc)
[529(2417)/588 at 32m35s] samba4.rpc.echo on ncacn_ip_tcp with object(nt4_dc)
[530(2427)/588 at 32m36s] samba.tests.libsmb(nt4_dc)
[531(2428)/588 at 32m37s] samba4.blackbox.trust_ntlm(nt4_member:local)
[532(2465)/588 at 32m47s] samba4.winbind.struct(nt4_member:local)
Running WINBINDD_LOOKUP_NAME_SID (struct based)
UNEXPECTED(failure): samba4.winbind.struct.lookup_name_sid(nt4_member:local)
REASON: Exception: Exception: ../../source4/torture/winbind/struct_based.c:988: WINBINDD_LOOKUPNAME returned 0, expected 1

FAILED (1 failures, 0 errors and 0 unexpected successes in 0 testsuites)

A summary with detailed information can be found in:
  ./bin/ab/summary
TOP 10 slowest tests
samba3.raw.notify(nt4_dc) -> 110
samba3.smb2.compound_find(nt4_dc) -> 94
samba3.smb2.notify(nt4_dc) -> 90
samba3.smb2.compound_find(nt4_dc) -> 87
samba3.raw.search(nt4_dc) -> 75
samba3.rpc.samr.passwords.lockout(nt4_dc) -> 62
samba4.rpc.echo on ncacn_np with object(nt4_dc) -> 61
samba3.smb2.dir(nt4_dc) -> 58
samba3.base.dir2(nt4_dc) -> 53
samba3.rpc.samr.passwords.pwdlastset(nt4_dc) -> 50
ERROR: test failed with exit code 1