Rust DoctorClippy · Correctness
Hashing a unit value
clippy::unit_hash
Hash the value you meant: hashing unit adds nothing to the hasher.
- Category
- Correctness
- Default level
- warn
- Tier
- P1
- Producer
- Clippy
- Diff scope
- line
Not a defect when
There is effectively no such case: hashing () feeds nothing to the hasher, so the call either meant to hash another value or can be deleted.
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::unit_hash=off .
rust-doctor --rule clippy::unit_hash=error .