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-144/2018-07-17-1813/flakey.log

The failure seems to be in the "ctdb" suite, whose build logs are available here:

   https://git.samba.org/autobuild.flakey.sn-devel-144/2018-07-17-1813/ctdb.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2018-07-17-1813/ctdb.stdout
  
The top commit at the time of the failure was:

commit ba991da43469a1844b67fcec19a15ceda409fc3f
Author: Ralph Boehme <slow at samba.org>
Date:   Tue Jul 17 12:59:50 2018 +0200

    tevent: fix CID 1437974 dereference after null check
    
    Probably a copy/paste error from the tevent_debug() statement a few
    lines above as at this place we want to pass main_ev directly to
    tevent_debug() anyway.
    
    Signed-off-by: Ralph Boehme <slow at samba.org>
    Reviewed-by: Volker Lendecke <vl at samba.org>
    
    Autobuild-User(master): Volker Lendecke <vl at samba.org>
    Autobuild-Date(master): Tue Jul 17 16:21:21 CEST 2018 on sn-devel-144

and the last 50 lines of the stdout log were:

 PASSED  tests/cunit/config_test_001.sh
 PASSED  tests/cunit/config_test_002.sh
 PASSED  tests/cunit/config_test_003.sh
 PASSED  tests/cunit/config_test_004.sh
 PASSED  tests/cunit/config_test_005.sh
 PASSED  tests/cunit/config_test_006.sh
 PASSED  tests/cunit/conf_test_001.sh
 PASSED  tests/cunit/db_hash_test_001.sh
 PASSED  tests/cunit/event_protocol_test_001.sh
 PASSED  tests/cunit/hash_count_test_001.sh
 PASSED  tests/cunit/path_tests_001.sh
 PASSED  tests/cunit/pidfile_test_001.sh
 PASSED  tests/cunit/pkt_read_001.sh
 PASSED  tests/cunit/pkt_write_001.sh
 PASSED  tests/cunit/porting_tests_001.sh
 PASSED  tests/cunit/protocol_test_001.sh
 PASSED  tests/cunit/protocol_test_002.sh
 PASSED  tests/cunit/protocol_test_012.sh
 PASSED  tests/cunit/protocol_test_101.sh
 PASSED  tests/cunit/protocol_test_111.sh
 PASSED  tests/cunit/protocol_test_201.sh
 PASSED  tests/cunit/rb_test_001.sh
 PASSED  tests/cunit/reqid_test_001.sh
 PASSED  tests/cunit/run_event_001.sh
 PASSED  tests/cunit/run_proc_001.sh
 PASSED  tests/cunit/sock_daemon_test_001.sh
 PASSED  tests/cunit/sock_io_test_001.sh
 PASSED  tests/cunit/srvid_test_001.sh
 PASSED  tests/eventd/eventd_001.sh
 PASSED  tests/eventd/eventd_002.sh
 PASSED  tests/eventd/eventd_003.sh
 PASSED  tests/eventd/eventd_004.sh
 PASSED  tests/eventd/eventd_005.sh
 PASSED  tests/eventd/eventd_006.sh
 PASSED  tests/eventd/eventd_007.sh
 PASSED  tests/eventd/eventd_008.sh
 PASSED  tests/eventd/eventd_009.sh
 PASSED  tests/eventd/eventd_011.sh
 PASSED  tests/eventd/eventd_012.sh
 PASSED  tests/eventd/eventd_013.sh
 PASSED  tests/eventd/eventd_014.sh
 PASSED  tests/eventd/eventd_021.sh
 PASSED  tests/eventd/eventd_022.sh
 PASSED  tests/eventd/eventd_023.sh
*FAILED* tests/eventd/eventd_024.sh

47/48 tests passed

Removing TEST_VAR_DIR=/memdisk/autobuild/fl/b60122/ctdb/ctdb/tests/var
autotest exited with exit status 1