Clippy · Correctness

Constant index past an array's length

clippy::out_of_bounds_indexing

Index within the array's length, or use get() to handle a range that may exceed it.

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

Not a defect when

The access sits in a cfg or const branch that is never compiled or reached for this array length, such as code shared across several fixed array sizes.

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

Set it once in rust-doctor.toml

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