autobuild[sn-devel-184]: intermittent test failure detected

[autobuild]

The autobuild test system (on sn-devel-184) 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-184/2019-02-27-1556/flakey.log

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

   https://git.samba.org/autobuild.flakey.sn-devel-184/2019-02-27-1556/samba-ad-dc-ntvfs.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-184/2019-02-27-1556/samba-ad-dc-ntvfs.stdout
  
The top commit at the time of the failure was:

commit 4f307f2302b0fe8fd0fc6379eb8e6491faf8520c
Author: Stefan Metzmacher <metze at samba.org>
Date:   Wed Feb 27 08:22:09 2019 +0100

    selftest: force running with TZ=UTC
    
    Signed-off-by: Stefan Metzmacher <metze at samba.org>
    Reviewed-by: Andreas Schneider <asn at samba.org>
    
    Autobuild-User(master): Stefan Metzmacher <metze at samba.org>
    Autobuild-Date(master): Wed Feb 27 11:24:59 UTC 2019 on sn-devel-144

and the last 50 lines of the stdout log were:

[132(351)/246 at 12m58s] samba4.raw.acls(ad_dc_ntvfs)
[133(363)/246 at 13m5s] samba4.raw.composite(ad_dc_ntvfs)
[134(367)/246 at 13m13s] samba4.raw.qfsinfo(ad_dc_ntvfs)
smbtorture 4.11.0pre1-DEVELOPERBUILD
Using seed 1551282973
Running level DSKATTR
Running level ALLOCATION
Running level VOLUME
Running level VOLUME_INFO
Running level SIZE_INFO
Running level DEVICE_INFO
Running level ATTRIBUTE_INFO
Running level UNIX_INFO
Running level VOLUME_INFORMATION
Running level SIZE_INFORMATION
Running level DEVICE_INFORMATION
Running level ATTRIBUTE_INFORMATION
Running level QUOTA_INFORMATION
Running level FULL_SIZE_INFORMATION
check for correct aliases
volume_info.volume_name = 'tmp'
attribute_info.fs_type = 'NTFS'
check for consistent disk sizes
total disk = 42275 MB
check consistent free disk space
Inconsistent avail size in DSKATTR and ALLOCATION - size1=17080 size2=17081
free disk = 17910 MB
volume info consistency
check for non-zero unknown fields
check for correct termination
UNEXPECTED(error): samba4.raw.qfsinfo.qfsinfo(ad_dc_ntvfs)
REASON: Exception: Exception: Unknown error/failure. Missing torture_fail() or torture_assert_*() call?

FAILED (0 failures, 1 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.raw.notify(ad_dc_ntvfs) -> 113
samba4.nbt.winsreplication(ad_dc_ntvfs) -> 76
samba4.base.deny2(ad_dc_ntvfs) -> 60
samba4.base.deny1(ad_dc_ntvfs) -> 54
samba4.raw.oplock(ad_dc_ntvfs) -> 49
samba4.base.createx_sharemodes_dir(ad_dc_ntvfs) -> 44
samba4.ldb.ldapi with options -U"$USERNAME%$PASSWORD"(ad_dc_ntvfs:local)(ad_dc_ntvfs:local) -> 33
samba4.base.delete(ad_dc_ntvfs) -> 31
samba4.raw.lock(ad_dc_ntvfs) -> 20
samba3.smbtorture_s3.plain.IOCTL(ad_dc_ntvfs) -> 18
ERROR: test failed with exit code 1
Makefile:16: recipe for target 'test' failed