Clippy · Correctness

Mutex locked again inside its own if let

clippy::if_let_mutex

Bind the first lock's result before the if let, so no guard is still held when the else branch locks again.

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

Not a defect when

There is effectively no such case: the lint only runs before edition 2024, where the scrutinee's guard lives through both branches, so a second lock in either one deadlocks.

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

Set it once in rust-doctor.toml

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