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-144/2019-03-16-1236/flakey.log

The failure seems to be in the "samba-ad-dc-5" suite, whose build logs are available here:

   https://git.samba.org/autobuild.flakey.sn-devel-144/2019-03-16-1236/samba-ad-dc-5.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2019-03-16-1236/samba-ad-dc-5.stdout
  
The top commit at the time of the failure was:

commit 1375e08580d642c069170e3e3bddc690bf3c5e89
Author: David Disseldorp <ddiss at samba.org>
Date:   Tue Mar 12 18:49:09 2019 +0100

    smbd: fix check_parent_access() talloc stackframe leaks
    
    check_parent_access() currently leaks a number of allocations onto the
    talloc_tos() context in both success and error paths.
    
    Signed-off-by: David Disseldorp <ddiss at samba.org>
    Reviewed-by: Volker Lendecke <vl at samba.org>
    
    Autobuild-User(master): David Disseldorp <ddiss at samba.org>
    Autobuild-Date(master): Fri Mar 15 11:32:04 UTC 2019 on sn-devel-144

and the last 50 lines of the stdout log were:

[288(1717)/320 at 16m43s] samba4.ntp.signd(ad_dc_default:local)
[289(1718)/320 at 16m44s] samba4.dns_internal.queryself(ad_dc_default:local)
[290(1719)/320 at 16m44s] samba4.dns_internal.updateself(ad_dc_default:local)
[291(1720)/320 at 16m45s] samba4.blackbox.samba_tool(ad_dc_default:local)(ad_dc_default:local)
[292(1726)/320 at 16m47s] samba.tests.gensec(ad_dc_default:local)
[293(1737)/320 at 16m50s] samba.tests.dcerpc.sam(ad_dc_default:local)
[294(1750)/320 at 16m54s] samba.tests.dsdb(ad_dc_default:local)
[295(1777)/320 at 17m4s] samba.tests.dcerpc.bare(ad_dc_default:local)
[296(1781)/320 at 17m4s] samba.tests.dcerpc.srvsvc(ad_dc_default:local)
[297(1781)/320 at 17m5s] samba.tests.samba_tool.timecmd(ad_dc_default:local)
[298(1783)/320 at 17m8s] samba.tests.samba_tool.join(ad_dc_default:local)
[299(1784)/320 at 17m10s] samba.tests.samba_tool.processes(ad_dc_default:local)
[300(1787)/320 at 17m10s] samba.tests.samba_tool.user(ad_dc_default:local)
[301(1794)/320 at 18m46s] samba.tests.samba_tool.user_wdigest(ad_dc_default:local)
WARNING: The "lsa over netlogon" option is deprecated
WARNING: The "server schannel" option is deprecated
WARNING: The "lsa over netlogon" option is deprecated
WARNING: The "server schannel" option is deprecated
WARNING: The "lsa over netlogon" option is deprecated
WARNING: The "server schannel" option is deprecated
WARNING: The "lsa over netlogon" option is deprecated
WARNING: The "server schannel" option is deprecated
WARNING: The "lsa over netlogon" option is deprecated
WARNING: The "server schannel" option is deprecated
UNEXPECTED(failure): samba.tests.samba_tool.user_wdigest.samba.tests.samba_tool.user_wdigest.UserCmdWdigestTestCase.test_Wdigest01(ad_dc_default:local)
REASON: Exception: Exception: Traceback (most recent call last):
  File "/memdisk/autobuild/fl/b1653469/samba-ad-dc-5/bin/python/samba/tests/samba_tool/user_wdigest.py", line 137, in test_Wdigest01
    self._testWDigest(attribute, expected)
  File "/memdisk/autobuild/fl/b1653469/samba-ad-dc-5/bin/python/samba/tests/samba_tool/user_wdigest.py", line 114, in _testWDigest
    "%s: %s" % (attribute, expected))
  File "/memdisk/autobuild/fl/b1653469/samba-ad-dc-5/bin/python/samba/tests/samba_tool/base.py", line 119, in assertMatch
    self.assertIn(string, base, msg)
AssertionError: 'virtualWDigest01: WdigestTestUser:SAMBADOMAIN:4183ff1e852f4df5d00a2ffc92dc283e' not found in 'dn: CN=WdigestTestUser,CN=Users,DC=samba,DC=example,DC=com\n\nGot password OK\n' : 'virtualWDigest01: WdigestTestUser:SAMBADOMAIN:4183ff1e852f4df5d00a2ffc92dc283e' is not in 'dn: CN=WdigestTestUser,CN=Users,DC=samba,DC=example,DC=com\n\nGot password OK\n'

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
samba4.ldb.ldaps with options -U"$USERNAME%$PASSWORD"(ad_dc_default)(ad_dc_default) -> 127
samba.tests.samba_tool.user(ad_dc_default:local) -> 95
samba4.drs.rpc.dssync on ncacn_ip_tcp with validate(ad_dc_default) -> 37
samba4.drs.rpc.msDSIntId on ncacn_ip_tcp with validate(ad_dc_default) -> 30
samba4.ldb.ldap with options '-U"$USERNAME%$PASSWORD"  --option=clientldapsaslwrapping=plain'(ad_dc_default)(ad_dc_default) -> 24
samba4.rpc.lsa.trusted.domains with bigendian(ad_dc_default) -> 24
samba4.rpc.lsa.trusted.domains with validate(ad_dc_default) -> 23
samba4.rpc.lsa.trusted.domains with (ad_dc_default) -> 23
samba4.ldb.ldap with options '-U"$USERNAME%$PASSWORD" -k yes --option=clientldapsaslwrapping=plain'(ad_dc_default)(ad_dc_default) -> 23
samba4.rpc.schannel on ncacn_ip_tcp with bigendian(ad_dc_default) -> 22
ERROR: test failed with exit code 1