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Clippy · Correctness

Loop that always exits on its first pass

clippy::never_loop

Remove the loop that never iterates twice, or fix its control flow.

Category
Correctness
Default level
warn
Tier
P1
Producer
Clippy
Diff scope
line

Not a defect when

The loop is a deliberate run-once block exited with break, written before labeled blocks were stable or to keep an MSRV below Rust 1.65.

What it reads

Clippy, with the compiler behind it. The only pass that compiles.

Tier

Serious: worth interrupting other work for.

The tier bounds how severe a rule may be; its category bounds the tier.

Diff scope

The changed line itself.

What --scope contextual looks at to decide whether a change caused the finding.

Change it

Turn it off, or make it blocking, without touching the code it flags:

rust-doctor --rule clippy::never_loop=off .
rust-doctor --rule clippy::never_loop=error .

Set it once in rust-doctor.toml

Upstream

Clippy's own documentation for this lint

Other Correctness rules