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Detect unused-asyncio-dangling-task (RUF006) on unused assignments #9060

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asafamr-mm
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Summary

Fixes #8863 : Detect asyncio-dangling-task (RUF006) when discarding return value

Test Plan

added new two testcases, changed result of an old one that was made more specific

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github-actions bot commented Dec 8, 2023

ruff-ecosystem results

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✅ ecosystem check detected no linter changes.

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✅ ecosystem check detected no linter changes.

else {
continue;
};
asyncio_dangling_task(checker, value, diagnostics);
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Nice job figuring this out.

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Can you try using typing::analyze::resolve_assignment here instead? It will also handle AnnAssign.

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Hmm, not sure how to do it without some refactoring.
I currently use assignment value expression which (if I'm not mistaken) is discarded after processing in resolve_assignment?

For now I've extended the pattern match to include AnnAssign as done in unnecessary_list_cast - but would gladly change it

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@charliermarsh charliermarsh left a comment

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Nice job! A few small comments. Thank you so much for taking this on.

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Thanks again!

@charliermarsh charliermarsh enabled auto-merge (squash) December 9, 2023 21:05
@charliermarsh charliermarsh changed the title RUF006 unused asyncio dangling task should trigger Detect unused-asyncio-dangling-task (RUF006) on unused assignments Dec 9, 2023
@charliermarsh charliermarsh added the bug Something isn't working label Dec 9, 2023
@charliermarsh charliermarsh enabled auto-merge (squash) December 9, 2023 21:06
@charliermarsh charliermarsh merged commit 6c2613b into astral-sh:main Dec 9, 2023
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@hauntsaninja
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I think this PR has caused ruff to start complaining even when assignments are to globals and nonlocals. Is that intentional?

@charliermarsh
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@hauntsaninja - probably not — if you share an example I’m happy to ensure it’s fixed in the next release.

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Thanks, filed #9262 !

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Detect asyncio-dangling-task (RUF006) when discarding return value
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