Gracefully handle invalid ‘ignore-paths’ regex crash

[RaulWCosta]

Bug description

Pylint fails with an error when executed on the following snippet:

import itertools

for i, j in enumerate(itertools.repeat(1)):
    if i == 10:
        break
    print(j)

Configuration

[tool.pylint.master]
extension-pkg-whitelist = [
  'numpy,nose,nose.tools,numpy.testing,pathlib.PurePath,pathlib.PosixPath,pathlib.Path',
]
output-format = ['colorized']
ignore-paths = ['project/tooling_context/**']

[tool.pylint.'MESSAGES CONTROL']
disable = [
  'C0412,C1801,duplicate-code,E0402,W0611,W1116,W1203,W1309,fixme,import-error,invalid-name,logging-format-interpolation,missing-docstring,no-else-return,no-member,protected-access,too-few-public-methods,trailing-comma-tuple',
]

[tool.pylint.'DESIGN']
max-args = 10
max-attributes = 14

[tool.pylint.'TYPECHECK']
ignored-modules = ['numpy, numpy.testing, pandas']
ignored-classes = ['numpy, numpy.testing, pandas']

[tool.pylint.'BASIC']
good-names = ['X, x, y']

[tool.pylint.'FORMAT']
max-line-length = 88

Command used

pylint -rn -sn --rcfile=pyproject.toml teste.py

Pylint output

Traceback (most recent call last):
  File "/Users/Raul_Costa/.pyenv/versions/project/bin/pylint", line 8, in <module>
    sys.exit(run_pylint())
  File "/Users/Raul_Costa/.pyenv/versions/3.10.13/envs/project/lib/python3.10/site-packages/pylint/__init__.py", line 34, in run_pylint
    PylintRun(argv or sys.argv[1:])
  File "/Users/Raul_Costa/.pyenv/versions/3.10.13/envs/project/lib/python3.10/site-packages/pylint/lint/run.py", line 162, in __init__
    args = _config_initialization(
  File "/Users/Raul_Costa/.pyenv/versions/3.10.13/envs/project/lib/python3.10/site-packages/pylint/config/config_initialization.py", line 66, in _config_initialization
    linter._parse_configuration_file(config_args)
  File "/Users/Raul_Costa/.pyenv/versions/3.10.13/envs/project/lib/python3.10/site-packages/pylint/config/arguments_manager.py", line 212, in _parse_configuration_file
    self.config, parsed_args = self._arg_parser.parse_known_args(
  File "/Users/Raul_Costa/.pyenv/versions/3.10.13/lib/python3.10/argparse.py", line 1866, in parse_known_args
    namespace, args = self._parse_known_args(args, namespace)
  File "/Users/Raul_Costa/.pyenv/versions/3.10.13/lib/python3.10/argparse.py", line 2079, in _parse_known_args
    start_index = consume_optional(start_index)
  File "/Users/Raul_Costa/.pyenv/versions/3.10.13/lib/python3.10/argparse.py", line 2019, in consume_optional
    take_action(action, args, option_string)
  File "/Users/Raul_Costa/.pyenv/versions/3.10.13/lib/python3.10/argparse.py", line 1927, in take_action
    argument_values = self._get_values(action, argument_strings)
  File "/Users/Raul_Costa/.pyenv/versions/3.10.13/lib/python3.10/argparse.py", line 2462, in _get_values
    value = self._get_value(action, arg_string)
  File "/Users/Raul_Costa/.pyenv/versions/3.10.13/lib/python3.10/argparse.py", line 2495, in _get_value
    result = type_func(arg_string)
  File "/Users/Raul_Costa/.pyenv/versions/3.10.13/envs/project/lib/python3.10/site-packages/pylint/config/argument.py", line 127, in _regexp_paths_csv_transfomer
    re.compile(
  File "/Users/Raul_Costa/.pyenv/versions/3.10.13/lib/python3.10/re.py", line 251, in compile
    return _compile(pattern, flags)
  File "/Users/Raul_Costa/.pyenv/versions/3.10.13/lib/python3.10/re.py", line 303, in _compile
    p = sre_compile.compile(pattern, flags)
  File "/Users/Raul_Costa/.pyenv/versions/3.10.13/lib/python3.10/sre_compile.py", line 788, in compile
    p = sre_parse.parse(p, flags)
  File "/Users/Raul_Costa/.pyenv/versions/3.10.13/lib/python3.10/sre_parse.py", line 955, in parse
    p = _parse_sub(source, state, flags & SRE_FLAG_VERBOSE, 0)
  File "/Users/Raul_Costa/.pyenv/versions/3.10.13/lib/python3.10/sre_parse.py", line 444, in _parse_sub
    itemsappend(_parse(source, state, verbose, nested + 1,
  File "/Users/Raul_Costa/.pyenv/versions/3.10.13/lib/python3.10/sre_parse.py", line 672, in _parse
    raise source.error("multiple repeat",
re.error: multiple repeat at position 26

Expected behavior

Pylint should run without exceptions

Pylint version

pylint==3.2.2

OS / Environment

MacOS Sonoma 14.5

Additional dependencies

No response

[Pierre-Sassoulas]

Thank you for opening the issue. This check created so much crashes since its creation. I would never have anticipated the crazy code constructs that can ends up in an enumerate when reviewing it.

[mbyrnepr2]

Thank you. It looks like the ** in the regex in the pyproject.toml is at the heart of this. Do we need a code-change @Pierre-Sassoulas, I could be missing something?

>>> import re
>>> re.match('project/tooling_context/**', 'project')
...
...
re.error: multiple repeat at position 25

[Pierre-Sassoulas]

Hmm, you're right, I have triaged too fast, I see an enumerate with a crash and I don't think anymore 😅

[mbyrnepr2]

Although we could handle the crash gracefully so some change is probably required :)