[1684440319:823654][4019396:0x3ff8a7fc910], wt, lsm-worker: [WT_VERB_DEFAULT][ERROR]: __lsm_worker, 167: Error in LSM worker thread 2: No such file or directory
[1684440319:823701][4019396:0x3ff8a7fc910], wt, lsm-worker: [WT_VERB_DEFAULT][ERROR]: __lsm_worker, 167: the process must exit and restart: WT_PANIC: WiredTiger library panic
[1684440319:823706][4019396:0x3ff8a7fc910], wt, lsm-worker: [WT_VERB_DEFAULT][ERROR]: __wt_abort, 28: aborting WiredTiger library

[pid:3704113]: FAIL: test_backup03.test_backup_target.test_backup_target(backup_4)
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[pid:3704113]: testtools.testresult.real._StringException: Traceback (most recent call last):
  File "/data/mci/116da67720ba2b0c456350c0c98580b0/wiredtiger/test/suite/wttest.py", line 468, in _callTestMethod
    method()
  File "/data/mci/116da67720ba2b0c456350c0c98580b0/wiredtiger/test/suite/test_backup03.py", line 123, in test_backup_target
    self.backup_table_cursor(self.list)
  File "/data/mci/116da67720ba2b0c456350c0c98580b0/wiredtiger/test/suite/test_backup03.py", line 111, in backup_table_cursor
    self.compare_backups(self.objs[i][0], self.dir, './')
  File "/data/mci/116da67720ba2b0c456350c0c98580b0/wiredtiger/test/suite/wtbackup.py", line 225, in compare_backups
    self.runWt(['-R', '-h', base_dir, 'dump', uri], outfilename=base_out)
  File "/data/mci/116da67720ba2b0c456350c0c98580b0/wiredtiger/test/suite/suite_subprocess.py", line 308, in runWt
    self.assertEqual(returncode, 0,
AssertionError: -6 != 0 : expected success: "['/data/mci/116da67720ba2b0c456350c0c98580b0/wiredtiger/cmake_build/wt', '-R', '-h', 'backup.dir', 'dump', 'table:test_backup.4']": exited -6
----------------------------------------------------------------------
Ran 13459 tests in 5964.112s

#3  0x000003ff9a36db44 in __wt_panic_func (session=session@entry=0x3ff9a4d5158, error=error@entry=2, func=func@entry=0x3ff9a3d1ae0 <__PRETTY_FUNCTION__.1> "__lsm_worker", line=line@entry=167, category=category@entry=WT_VERB_DEFAULT, fmt=0x3ff9a3d1a8c "Error in LSM worker thread %u") at /data/mci/dcef63643413ac11ab5ccb0704af4163/wiredtiger/src/support/err.c:570