[Travis] Mysterious killed eunit test in couch_replicator_use_checkpoints_tests

[wohali]

Current & Expected Behaviour

In one Travis run (Erlang 19.3) the test module couch_replicator_use_checkpoints_tests failed mysteriously:

  Replication use_checkpoints feature tests
    use_checkpoints: false
      local -> local
        couch_replicator_use_checkpoints_tests:111: should_populate_source...[0.033 s] ok
        couch_replicator_use_checkpoints_tests:118: should_replicate...[0.053 s] ok
        couch_replicator_use_checkpoints_tests:125: should_compare_databases...[0.051 s] ok
        [done in 0.146 s]
    *unexpected termination of test process*
::killed

The couch.log (uploader _id travis-couchdb-237668845-2017-05-30T20:31:25.123334) shows nothing out of the ordinary, though there are some initial failures to load some _local documents when starting up replication.

[wohali]

There's not enough to go on here, and we've only ever seen this issue once.

Reopen if this recurs.