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Do not recurse forever in significant_drop_tightening #14641

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samueltardieu
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@samueltardieu samueltardieu commented Apr 17, 2025

Limit the recursion depth, as each level of nesting adds another deeper projection.

There might be a more complex way of handling the problem, but infinite recursions are bad, and don't allow Clippy to terminate properly.

changelog: [significant_drop_tightening]: do not recurse forever when checking for attribute on type or its constituent

Fixes #13544

@rustbot label +L-nursery

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rustbot commented Apr 17, 2025

r? @Alexendoo

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@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties L-nursery Lint: Currently in the nursery group labels Apr 17, 2025
Limit the recursion depth, as each level of nesting adds another deeper
projection.
@samueltardieu samueltardieu force-pushed the significant-drop-tightening-recursion-limit branch from dd26f17 to cc6a3d8 Compare April 17, 2025 10:58
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Assigning to Timo who diagnosed the problem in the original issue

r? @y21

@rustbot rustbot assigned y21 and unassigned Alexendoo Apr 17, 2025
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y21 commented Apr 17, 2025

Ah, I just replied to the issue with how we could probably fix this and then saw this PR and does it exactly that way, nice ^^

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lgtm

@y21 y21 added this pull request to the merge queue Apr 17, 2025
Merged via the queue into rust-lang:master with commit 30e9cd5 Apr 17, 2025
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@samueltardieu samueltardieu deleted the significant-drop-tightening-recursion-limit branch April 17, 2025 11:20
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Eternal lint on a recursive tree
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