Test failure
ERROR: test_timestamp18.test_timestamp18.test_ts_writes_with_non_ts_write(column.delete) (subunit.RemotedTestCase)
test_timestamp18.test_timestamp18.test_ts_writes_with_non_ts_write(column.delete)
----------------------------------------------------------------------
testtools.testresult.real._StringException: Traceback (most recent call last):
  File "/data/mci/1a6e2bc8e0c9612c8d71f2a91a26cd8c/wiredtiger/test/suite/test_timestamp18.py", line 89, in test_ts_writes_with_non_ts_write
    cursor[self.get_key(i)] = value3
  File "/data/mci/1a6e2bc8e0c9612c8d71f2a91a26cd8c/wiredtiger/cmake_build/lang/python/wiredtiger/swig_wiredtiger.py", line 321, in __setitem__
    if self.insert() != 0:
_wiredtiger.WiredTigerError: WT_ROLLBACK: conflict between concurrent operations
----------------------------------------------------------------------
Ran 9019 tests in 7727.207s
Link: https://evergreen.mongodb.com/task_log_raw/wiredtiger_macos_1014_unit_test_c5e3a8a043ba2c59c6cb3884f4d729992e2e1185_22_05_05_03_29_52/0?type=T#L33511

Evergreen YAML Script Failure
Command failed: command encountered problem: error waiting on process '2fe56779-ecfb-4999-8c36-e5c5adaa042d': exit status 1

Link: https://evergreen.mongodb.com/task_log_raw/wiredtiger_macos_1014_unit_test_c5e3a8a043ba2c59c6cb3884f4d729992e2e1185_22_05_05_03_29_52/0?type=T#L33525

Failure keywords
Heartbeat ticker canceled, aborting task

Link: https://evergreen.mongodb.com/task_log_raw/wiredtiger_macos_1014_unit_test_c5e3a8a043ba2c59c6cb3884f4d729992e2e1185_22_05_05_03_29_52/0?type=T#L33565