Below test_compat02 Python test started to fail since the merge of WT-4939 on OS X build variant in Evergreen. Please note the follow-on work WT-4958 did not resolve this issue.
[2019/07/19 01:35:22.144] ====================================================================== [2019/07/19 01:35:22.144] ERROR: test_compat02.test_compat02.test_compat02(30.26_rel.31_min.future_max.basecfg_false) (subunit.RemotedTestCase) [2019/07/19 01:35:22.144] test_compat02.test_compat02.test_compat02(30.26_rel.31_min.future_max.basecfg_false) [2019/07/19 01:35:22.144] ---------------------------------------------------------------------- [2019/07/19 01:35:22.144] _StringException: lost connection during test 'test_compat02.test_compat02.test_compat02(30.26_rel.31_min.future_max.basecfg_false)' [2019/07/19 01:35:22.144] ----------------------------------------------------------------------