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-144/2018-07-08-1249/flakey.log

The failure seems to be in the "samba-none-env" suite, whose build logs are available here:

   https://git.samba.org/autobuild.flakey.sn-devel-144/2018-07-08-1249/samba-none-env.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2018-07-08-1249/samba-none-env.stdout
  
The top commit at the time of the failure was:

commit e8b7aecf460a0c09cadbefda0a9b5fe1432f4089
Author: Andreas Schneider <asn at samba.org>
Date:   Thu Jul 5 18:02:48 2018 +0200

    winbind_krb5_localauth: Fix a compiler warning
    
    This can't used uninitialized but some compiler complains about it.
    
    Signed-off-by: Andreas Schneider <asn at samba.org>
    Reviewed-by: Jeremy Allison <jra at samba.org>
    
    Autobuild-User(master): Ralph Böhme <slow at samba.org>
    Autobuild-Date(master): Sat Jul  7 16:24:30 CEST 2018 on sn-devel-144

and the last 50 lines of the stdout log were:

[213(2942)/244 at 19m11s] pidl.parse_idl
[214(3079)/244 at 19m13s] pidl.samba-ndr
[215(3110)/244 at 19m14s] pidl.samba3-cli
[216(3118)/244 at 19m14s] pidl.samba3-srv
[217(3119)/244 at 19m14s] pidl.tdr
[218(3125)/244 at 19m14s] pidl.test_util
[219(3131)/244 at 19m14s] pidl.typelist
[220(3187)/244 at 19m15s] pidl.util
[221(3259)/244 at 19m16s] pidl.wireshark-conf
[222(3308)/244 at 19m17s] pidl.wireshark-ndr
[223(3348)/244 at 19m17s] tdb.python
[224(3402)/244 at 19m19s] samba.tests.dsdb_lock
[225(3409)/244 at 20m28s] samba.tests.samba_tool.visualize
[226(3420)/244 at 20m31s] samba.tests.samba_tool.provision_password_check
[227(3424)/244 at 20m38s] samba.tests.samba_tool.help
[228(3425)/244 at 21m13s] samba.tests.loadparm
[229(3428)/244 at 21m13s] samba4.blackbox.samba3dump
[230(3429)/244 at 21m14s] samba4.blackbox.upgrade
[231(3437)/244 at 21m38s] samba4.blackbox.provision.py
[232(3444)/244 at 22m22s] samba4.blackbox.supported_features
[233(3450)/244 at 22m30s] samba4.blackbox.start_backup
[234(3453)/244 at 22m38s] samba4.blackbox.upgradeprovision.current
[235(3460)/244 at 23m54s] samba4.blackbox.setpassword.py
[236(3466)/244 at 24m4s] samba4.blackbox.newuser.py
[237(3477)/244 at 24m15s] samba4.blackbox.group.py
[238(3506)/244 at 24m33s] samba4.blackbox.provision-backend
[239(3510)/244 at 24m40s] samba4.blackbox.renamedc.sh
[240(3521)/244 at 25m0s] samba4.dsdb.samdb.ldb_modules.unique_object_sids
[241(3527)/244 at 25m0s] samba4.dsdb.samdb.ldb_modules.encrypted_secrets
[242(3538)/244 at 25m1s] lib.audit_logging.audit_logging
UNEXPECTED(failure): lib.audit_logging.audit_logging.test_audit_get_timestamp(none)
REASON: Exception: Exception: difftime(after, actual) >= 0
../lib/audit_logging/tests/audit_logging_test.c:668: error: Failure!

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
samba.tests.docs -> 169
samba.tests.docs.python3 -> 163
samba4.blackbox.upgradeprovision.release-4-0-0 -> 115
samba4.blackbox.upgradeprovision.alpha13 -> 113
samba4.blackbox.schemaupgrade -> 102
samba4.blackbox.upgradeprovision.current -> 76
samba.tests.dsdb_lock -> 69
samba4.blackbox.dbcheck.release-4-0-0 -> 67
samba4.blackbox.dbcheck.release-4-1-0rc3 -> 56
samba4.blackbox.functionalprep -> 49
ERROR: test failed with exit code 1