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-144/2018-01-22-0319/flakey.log

The samba build logs are available here:

   http://git.samba.org/autobuild.flakey.sn-devel-144/2018-01-22-0319/samba.stderr
   http://git.samba.org/autobuild.flakey.sn-devel-144/2018-01-22-0319/samba.stdout
  
The top commit at the time of the failure was:

commit ac9d528b823aa89b3f3144f9377cc540f4b692e4
Author: Volker Lendecke <vl at samba.org>
Date:   Thu Jan 18 10:57:23 2018 +0100

    docs: Remove prog_guide4.txt
    
    Move the still relevant parts elsewhere
    
    Signed-off-by: Volker Lendecke <vl at samba.org>
    Reviewed-by: Jeremy Allison <jra at samba.org>
    
    Autobuild-User(master): Martin Schwenke <martins at samba.org>
    Autobuild-Date(master): Sun Jan 21 11:48:01 CET 2018 on sn-devel-144