Old pylint versions crash on some of our scripts with modern Python

[gilles-peskine-arm]

Our official pylint version (2.4.4 per ci.reqiurements.txt) chokes on tests/scripts/translate_ciphers.py when run under Python 3.9–3.11. Python ≤3.8 is fine.

$ venv-run venv-3.9 pylint tests/scripts/translate_ciphers.py
Traceback (most recent call last):
  File "/home/gilpes01/z/dev/mbedtls/main/venv-3.9/bin/pylint", line 8, in <module>
    sys.exit(run_pylint())
  File "/home/gilpes01/z/dev/mbedtls/main/venv-3.9/lib/python3.9/site-packages/pylint/__init__.py", line 23, in run_pylint
    PylintRun(sys.argv[1:])
  File "/home/gilpes01/z/dev/mbedtls/main/venv-3.9/lib/python3.9/site-packages/pylint/lint.py", line 1731, in __init__
    linter.check(args)
  File "/home/gilpes01/z/dev/mbedtls/main/venv-3.9/lib/python3.9/site-packages/pylint/lint.py", line 1004, in check
    self._do_check(files_or_modules)
  File "/home/gilpes01/z/dev/mbedtls/main/venv-3.9/lib/python3.9/site-packages/pylint/lint.py", line 1165, in _do_check
    self.check_astroid_module(ast_node, walker, rawcheckers, tokencheckers)
  File "/home/gilpes01/z/dev/mbedtls/main/venv-3.9/lib/python3.9/site-packages/pylint/lint.py", line 1252, in check_astroid_module
    walker.walk(ast_node)
  File "/home/gilpes01/z/dev/mbedtls/main/venv-3.9/lib/python3.9/site-packages/pylint/utils/ast_walker.py", line 77, in walk
    self.walk(child)
  File "/home/gilpes01/z/dev/mbedtls/main/venv-3.9/lib/python3.9/site-packages/pylint/utils/ast_walker.py", line 77, in walk
    self.walk(child)
  File "/home/gilpes01/z/dev/mbedtls/main/venv-3.9/lib/python3.9/site-packages/pylint/utils/ast_walker.py", line 77, in walk
    self.walk(child)
  File "/home/gilpes01/z/dev/mbedtls/main/venv-3.9/lib/python3.9/site-packages/pylint/utils/ast_walker.py", line 74, in walk
    callback(astroid)
  File "/home/gilpes01/z/dev/mbedtls/main/venv-3.9/lib/python3.9/site-packages/pylint/checkers/typecheck.py", line 1598, in visit_subscript
    inferred = safe_infer(node.slice.value)
AttributeError: 'Name' object has no attribute 'value'

Python 3.12 is even worse: pylint 2.4.4 doesn't work at all.

$ venv-run venv-3.12 pip install pylint==2.4.4
…
$ venv-run venv-3.12 pylint --version
Traceback (most recent call last):
  File "/home/gilpes01/z/dev/mbedtls/main/venv-3.12/bin/pylint", line 5, in <module>
    from pylint import run_pylint
  File "/home/gilpes01/z/dev/mbedtls/main/venv-3.12/lib/python3.12/site-packages/pylint/__init__.py", line 13, in <module>
    from pylint.checkers.similar import Run as SimilarRun
  File "/home/gilpes01/z/dev/mbedtls/main/venv-3.12/lib/python3.12/site-packages/pylint/checkers/__init__.py", line 42, in <module>
    from pylint.checkers.base_checker import BaseChecker, BaseTokenChecker
  File "/home/gilpes01/z/dev/mbedtls/main/venv-3.12/lib/python3.12/site-packages/pylint/checkers/base_checker.py", line 17, in <module>
    from pylint.config import OptionsProviderMixIn
  File "/home/gilpes01/z/dev/mbedtls/main/venv-3.12/lib/python3.12/site-packages/pylint/config.py", line 49, in <module>
    from pylint import utils
  File "/home/gilpes01/z/dev/mbedtls/main/venv-3.12/lib/python3.12/site-packages/pylint/utils/__init__.py", line 44, in <module>
    from pylint.utils.ast_walker import ASTWalker
  File "/home/gilpes01/z/dev/mbedtls/main/venv-3.12/lib/python3.12/site-packages/pylint/utils/ast_walker.py", line 8, in <module>
    from astroid import nodes
  File "/home/gilpes01/z/dev/mbedtls/main/venv-3.12/lib/python3.12/site-packages/astroid/__init__.py", line 43, in <module>
    import wrapt
  File "/home/gilpes01/z/dev/mbedtls/main/venv-3.12/lib/python3.12/site-packages/wrapt/__init__.py", line 10, in <module>
    from .decorators import (adapter_factory, AdapterFactory, decorator,
  File "/home/gilpes01/z/dev/mbedtls/main/venv-3.12/lib/python3.12/site-packages/wrapt/decorators.py", line 34, in <module>
    from inspect import ismethod, isclass, formatargspec
ImportError: cannot import name 'formatargspec' from 'inspect' (/usr/lib/python3.12/inspect.py). Did you mean: 'formatargvalues'?

---

Pylint 2.6.2, which is the last version that supports Python 3.5), works on tests/scripts/translate_ciphers.py, but under Python 3.11 it crashes with a different exception on several files:

scripts/abi_check.py
scripts/generate_driver_wrappers.py
tests/scripts/analyze_outcomes.py
tests/scripts/check_names.py
tests/scripts/depends.py