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build(deps): Bump pylint from 4.0.7 to 4.0.9 - #361

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Bumps pylint from 4.0.7 to 4.0.9.

Release notes

Sourced from pylint's releases.

v4.0.9

What's new in Pylint 4.0.9?

Release date: 2026-09-23

Security Fixes

  • Someone without access to the configuration or linted code, but with access to the cache directory (predictable PYLINT_HOME on a multi-user host) can no longer write a crafted pickle that will runs arbitrary code when pylint access its stat cache. The result cache is now stored as JSON instead of pickle, preventing code-execution. The workaround is upgrading or not pointing PYLINT_HOME to an untrusted, shared, or group-writable directory. The default value, ~/.cache/pylint, is writable only by the user running pylint. (CVE with the same information pending)

False Positives Fixed

  • Fixed a false positive for no-self-use on a method that only uses self before a locally defined class (or other nested method), because the checker's could-be-a-function tracking state was not restored after visiting the nested method.

    Closes #3705

  • Fix a false positive for :ref:not-callable when calling functions constructed with types.FunctionType or types.LambdaType.

    Closes #7500

  • Fix a false positive for unnecessary-direct-lambda-call when a directly called lambda in a class body wraps a comprehension containing an assignment expression. PEP 572 makes that a SyntaxError without the lambda's scope, so following the message produced code that would not compile.

    Closes #9294

  • Fix a false positive for :ref:unnecessary-ellipsis when an ellipsis is the sole body statement of a method defined on a Protocol.

    Closes #9319

  • Fix a false positive for :ref:bad-exception-cause when the bases of the class being raised from cannot be inferred, such as an exception deriving from a C extension class. :ref:raising-non-exception and :ref:catching-non-exception already guard the same inherit_from_std_ex

... (truncated)

Commits
  • 303703f Bump pylint to 4.0.9, update changelog (#11448)
  • b342384 Fix block-scoped disable leaking into sibling elif/else blocks (#11429) (#11445)
  • 58c87cf Store the results cache as JSON instead of pickle
  • e3f4942 [Backport maintenance/4.0.x] Fix crash on failed attribute inference (#11443)
  • faf47f9 [Backport maintenance/4.0.x] Fix false positive no-self-use when a method con...
  • 20c7bb9 [Backport maintenance/4.0.x] Fix a crash in method-hidden for methods named a...
  • 47e6757 [Backport maintenance/4.0.x] Fix bad-exception-cause false positive when the ...
  • ae3ee53 [Backport maintenance/4.0.x] Fix not-callable false positive for types.Functi...
  • 3e444be [Backport maintenance/4.0.x] Fix a crash in unnecessary-default-type-args for...
  • 8f2dd4f [Backport maintenance/4.0.x] Fix declare-non-slot false positives for ClassVa...
  • Additional commits viewable in compare view

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Bumps [pylint](https://github.com/pylint-dev/pylint) from 4.0.7 to 4.0.9.
- [Release notes](https://github.com/pylint-dev/pylint/releases)
- [Commits](pylint-dev/pylint@v4.0.7...v4.0.9)

---
updated-dependencies:
- dependency-name: pylint
  dependency-version: 4.0.9
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
@dependabot dependabot Bot added dependencies Pull requests that update a dependency file python Pull requests that update python code labels Oct 1, 2026

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@dependabot merge

@codacy-production

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Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

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🟢 Metrics 0 complexity · 0 duplication

Metric Results
Complexity 0
Duplication 0

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AI Reviewer: first review requested successfully. AI can make mistakes. Always validate suggestions.

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TIP This summary will be updated as you push new changes.

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Pull Request Overview

No merge-blocking issues were identified. Codacy reports the PR is up to standards, with no new issues, complexity changes, or clone findings.

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@dependabot @github

dependabot Bot commented on behalf of github Oct 7, 2026

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Superseded by #362.

@dependabot dependabot Bot closed this Oct 7, 2026
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dependabot Bot deleted the dependabot/pip/pylint-4.0.9 branch October 7, 2026 05:42
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