Please see the attached output from the test run.  But here's a sample:

======================================================================
FAIL: test_lists (test.test_gdb.PrettyPrintTests)
Verify the pretty-printing of lists
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/larry/src/python/nodocstrings/Lib/test/test_gdb.py", line 258, in test_lists
    self.assertGdbRepr(list(range(5)))
  File "/home/larry/src/python/nodocstrings/Lib/test/test_gdb.py", line 228, in assertGdbRepr
    cmds_after_breakpoint)
  File "/home/larry/src/python/nodocstrings/Lib/test/test_gdb.py", line 196, in get_gdb_repr
    import_site=import_site)
  File "/home/larry/src/python/nodocstrings/Lib/test/test_gdb.py", line 179, in get_stack_trace
    self.assertEqual(unexpected_errlines, [])
AssertionError: Lists differ: ["Python Exception <class 'UnicodeDecodeEr[197 chars]e: "] != []

First list contains 2 additional elements.
First extra element 0:
Python Exception <class 'UnicodeDecodeError'> 'utf-8' codec can't decode byte 0xfc in position 1: invalid start byte: 

+ []
- ["Python Exception <class 'UnicodeDecodeError'> 'utf-8' codec can't decode "
-  'byte 0xfc in position 1: invalid start byte: ',
-  "Python Exception <class 'UnicodeDecodeError'> 'utf-8' codec can't decode "
-  'byte 0xfc in position 1: invalid start byte: ']