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Should raise undefined-variable for self-referencing walrus operator expressions #5653

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jacobtylerwalls opened this issue Jan 8, 2022 · 0 comments · Fixed by #6915
Closed

Should raise undefined-variable for self-referencing walrus operator expressions #5653

jacobtylerwalls opened this issue Jan 8, 2022 · 0 comments · Fixed by #6915
Labels
Assignment expression Related to the walrus operator / assignment expression C: undefined-variable Issues related to 'undefined-variable' check False Negative 🦋 No message is emitted but something is wrong with the code
Milestone
2.15.0

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@jacobtylerwalls
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Bug description

"""Should raise undefined-variable"""
if var := var:
    print(var)

Configuration

No response

Command used

pylint a.py

Pylint output

-------------------------------------------------------------------
Your code has been rated at 10.00/10 (previous run: 5.00/10, +5.00)

Expected behavior

line 2: undefined-variable

Pylint version

pylint 2.13.0-dev0
astroid 2.9.2
Python 3.10.1 (v3.10.1:2cd268a3a9, Dec  6 2021, 14:28:59) [Clang 13.0.0 (clang-1300.0.29.3)]

OS / Environment

No response

Additional dependencies

No response
@jacobtylerwalls jacobtylerwalls added the Needs triage 📥 Just created, needs acknowledgment, triage, and proper labelling label Jan 8, 2022
@DanielNoord DanielNoord added C: undefined-variable Issues related to 'undefined-variable' check False Negative 🦋 No message is emitted but something is wrong with the code and removed Needs triage 📥 Just created, needs acknowledgment, triage, and proper labelling labels Jan 9, 2022
@jacobtylerwalls jacobtylerwalls added the Assignment expression Related to the walrus operator / assignment expression label Mar 10, 2022
@jacobtylerwalls jacobtylerwalls mentioned this issue Jun 11, 2022
Merged
@Pierre-Sassoulas Pierre-Sassoulas added this to the 2.15.0 milestone Jun 11, 2022
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Labels
Assignment expression Related to the walrus operator / assignment expression C: undefined-variable Issues related to 'undefined-variable' check False Negative 🦋 No message is emitted but something is wrong with the code
Projects
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Milestone
2.15.0
Development

Successfully merging a pull request may close this issue.

Warn about self-referencing named expressions lacking prior assignments jacobtylerwalls/pylint
3 participants
@Pierre-Sassoulas @DanielNoord @jacobtylerwalls