home$ ./python -m test test_codecs -m test_decode_surrogateescape
Using random seed: 2297497288
0:00:00 load avg: 0.07 Run 1 test sequentially in a single process
0:00:00 load avg: 0.07 [1/1] test_codecs
test test_codecs failed -- Traceback (most recent call last):
  File "/home/blue/cpython/Lib/test/test_codecs.py", line 3698, in check_decode_strings
    decoded = self.decode(encoded, errors)
  File "/home/blue/cpython/Lib/test/test_codecs.py", line 3665, in decode
    return _testinternalcapi.DecodeLocaleEx(encoded, 0, errors)
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^
RuntimeError: decode error: pos=9, reason=decoding error
test_codecs failed (1 error)
== Tests result: FAILURE ==
1 test failed:
    test_codecs
Total duration: 235 ms
Total tests: run=1 (filtered)
Total test files: run=1/1 (filtered) failed=1
Result: FAILURE