This PR is stale because it has been open for 30 days with no activity.

I get:
./python -m test -vvv test_pdb
== CPython 3.11.0a5+ (heads/main:92a8fd08c7, Mar 1 2022, 17:51:16) [GCC 11.2.0]
== Linux-5.13.0-30-generic-x86_64-with-glibc2.34 little-endian
== cwd: /home/me/Documents/cpython/build/test_python_28417æ
== CPU count: 8
== encodings: locale=UTF-8, FS=utf-8
0:00:00 load avg: 0.94 Run tests sequentially
0:00:00 load avg: 0.94 [1/1] test_pdb
test test_pdb crashed -- Traceback (most recent call last):
File "/home/me/Documents/cpython/Lib/test/libregrtest/runtest.py", line 340, in _runtest_inner
refleak = _runtest_inner2(ns, test_name)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/me/Documents/cpython/Lib/test/libregrtest/runtest.py", line 280, in _runtest_inner2
the_module = importlib.import_module(abstest)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/me/Documents/cpython/Lib/importlib/init.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "", line 1206, in _gcd_import
File "", line 1178, in _find_and_load
File "", line 1149, in _find_and_load_unlocked
File "", line 690, in _load_unlocked
File "", line 924, in exec_module
File "", line 241, in _call_with_frames_removed
File "/home/me/Documents/cpython/Lib/test/test_pdb.py", line 18, in
from test.test_doctest import _FakeInput
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/me/Documents/cpython/Lib/test/test_doctest.py", line 2816, in
if supports_unicode and not support.has_no_debug_ranges():
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/me/Documents/cpython/Lib/test/support/init.py", line 433, in has_no_debug_ranges
return bool(config['no_debug_ranges'])
~~~~~~^^^^^^^^^^^^^^^^^^^
KeyError: 'no_debug_ranges'

test_pdb failed (uncaught exception)

== Tests result: FAILURE ==

1 test failed:
test_pdb

Total duration: 205 ms
Tests result: FAILURE