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Clippy · Correctness

splitn count of zero or one never splits

clippy::suspicious_splitn

Pass a count of at least 2 to splitn, which with 0 or 1 never splits.

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

Not a defect when

The count comes from a shared constant or generic code path where 1 deliberately yields the whole string as a single item for this instance.

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

Set it once in rust-doctor.toml

Upstream

Clippy's own documentation for this lint

Other Correctness rules