[pid:141980]: ERROR: test_txn07.test_txn07.test_ops(var.trunc-both.t1r.nop)
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[pid:141980]: testtools.testresult.real._StringException: Traceback (most recent call last):
  File "/data/mci/5cf96e3e4328d232cf091d0aa777362b/wiredtiger/test/suite/wttest.py", line 233, in _callTestMethod
    method()
  File "/data/mci/5cf96e3e4328d232cf091d0aa777362b/wiredtiger/test/suite/test_txn07.py", line 189, in test_ops
    self.check_all(current, committed)
  File "/data/mci/5cf96e3e4328d232cf091d0aa777362b/wiredtiger/test/suite/test_txn07.py", line 107, in check_all
    self.check(self.session2, "isolation=snapshot", committed)
  File "/data/mci/5cf96e3e4328d232cf091d0aa777362b/wiredtiger/test/suite/test_txn07.py", line 91, in check
    actual = dict((k, v) for k, v in c if v != 0)
  File "/data/mci/5cf96e3e4328d232cf091d0aa777362b/wiredtiger/test/suite/test_txn07.py", line 91, in <genexpr>
    actual = dict((k, v) for k, v in c if v != 0)
  File "/data/mci/5cf96e3e4328d232cf091d0aa777362b/wiredtiger/cmake_build/lang/python/wiredtiger/swig_wiredtiger.py", line 110, in __next__
    return self.cursor.get_keys() + self.cursor.get_values()
  File "/data/mci/5cf96e3e4328d232cf091d0aa777362b/wiredtiger/cmake_build/lang/python/wiredtiger/swig_wiredtiger.py", line 270, in get_values
    return unpack(self.value_format, self._get_value())
  File "/data/mci/5cf96e3e4328d232cf091d0aa777362b/wiredtiger/cmake_build/lang/python/wiredtiger/packing.py", line 109, in unpack
    result.append(_string_result(s[:size]))
  File "/data/mci/5cf96e3e4328d232cf091d0aa777362b/wiredtiger/cmake_build/lang/python/wiredtiger/packutil.py", line 59, in _string_result
    return s.decode()
UnicodeDecodeError: 'utf-8' codec can't decode bytes in position 4-5: invalid continuation byte
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Ran 14483 tests in 3518.280s