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:

   http://git.samba.org/autobuild.flakey.sn-devel-144/2017-04-18-1857/flakey.log

The samba build logs are available here:

   http://git.samba.org/autobuild.flakey.sn-devel-144/2017-04-18-1857/samba.stderr
   http://git.samba.org/autobuild.flakey.sn-devel-144/2017-04-18-1857/samba.stdout
  
The top commit at the time of the failure was:

commit 76b351e907f67cc7d4af4e7d800c7a3aa1269ee8
Author: Jeremy Allison <jra at samba.org>
Date:   Mon Apr 17 14:30:54 2017 -0700

    s3:smbd: Fix incorrect use of sys_getgroups()
    
    Second arg must be NULL when first arg is 0 (it is in all other places).
    
    Bug report and patch from Hanno Böck <hanno at hboeck.de>
    
    BUG: https://bugzilla.samba.org/show_bug.cgi?id=12747
    
    Signed-off-by: Jeremy Allison <jra at samba.org>
    Reviewed-by: Andreas Schneider <asn at samba.org>
    
    Autobuild-User(master): Andreas Schneider <asn at cryptomilk.org>
    Autobuild-Date(master): Tue Apr 18 15:43:02 CEST 2017 on sn-devel-144