Lots of them, just like this:

======================================================================
FAIL: test_NULL_ob_type (test.test_gdb.PrettyPrintTests)
Ensure that a PyObject* with NULL ob_type is handled gracefully
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/barry/projects/python/cpython/Lib/test/test_gdb.py", line 449, in test_NULL_ob_type
    'set v->ob_type=0')
  File "/home/barry/projects/python/cpython/Lib/test/test_gdb.py", line 420, in assertSane
    cmds_after_breakpoint=cmds_after_breakpoint)
  File "/home/barry/projects/python/cpython/Lib/test/test_gdb.py", line 206, in get_gdb_repr
    import_site=import_site)
  File "/home/barry/projects/python/cpython/Lib/test/test_gdb.py", line 184, in get_stack_trace
    self.assertEqual(unexpected_errlines, [])
AssertionError: Lists differ: ["Got object file from memory but can't read symbols: File truncated."] != []

First list contains 1 additional elements.
First extra element 0:
Got object file from memory but can't read symbols: File truncated.

- ["Got object file from memory but can't read symbols: File truncated."]
+ []