[pid:3236]: FAIL: test_backup03.test_backup_target.test_backup_target(backup_4)
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[pid:3236]: testtools.testresult.real._StringException: Traceback (most recent call last):
  File "/data/mci/d62be4fa93cf20f4516e63ebc5410075/wiredtiger/test/suite/wttest.py", line 229, in _callTestMethod
    method()
  File "/data/mci/d62be4fa93cf20f4516e63ebc5410075/wiredtiger/test/suite/test_backup03.py", line 123, in test_backup_target
    self.backup_table_cursor(self.list)
  File "/data/mci/d62be4fa93cf20f4516e63ebc5410075/wiredtiger/test/suite/test_backup03.py", line 111, in backup_table_cursor
    self.compare_backups(self.objs[i][0], self.dir, './')
  File "/data/mci/d62be4fa93cf20f4516e63ebc5410075/wiredtiger/test/suite/wtbackup.py", line 225, in compare_backups
    self.runWt(['-R', '-h', base_dir, 'dump', uri], outfilename=base_out)
  File "/data/mci/d62be4fa93cf20f4516e63ebc5410075/wiredtiger/test/suite/suite_subprocess.py", line 312, in runWt
    self.check_empty_file(wterrname)
  File "/data/mci/d62be4fa93cf20f4516e63ebc5410075/wiredtiger/test/suite/suite_subprocess.py", line 151, in check_empty_file
    self.assertEqual(filesize, 0, filename + ': expected to be empty')
  File "/opt/mongodbtoolchain/revisions/69f4f0673ffcb290ce2307560a4883ecf2ad138c/stow/python3-v4.wuP/lib/python3.10/unittest/case.py", line 845, in assertEqual
    assertion_func(first, second, msg=msg)
  File "/opt/mongodbtoolchain/revisions/69f4f0673ffcb290ce2307560a4883ecf2ad138c/stow/python3-v4.wuP/lib/python3.10/unittest/case.py", line 838, in _baseAssertEqual
    raise self.failureException(msg)
AssertionError: 46 != 0 : wt.err: expected to be empty
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Ran 39943 tests in 5560.918s

AssertionError: unexpected standard output, contains: "ERROR: wt.err expected to be empty, but contains: