Rust DoctorClippy · Correctness
Transmuting null into a reference
clippy::transmuting_null
Use Option<&T> and None instead of transmuting a null pointer into a reference.
- Category
- Correctness
- Default level
- warn
- Tier
- P1
- Producer
- Clippy
- Diff scope
- line
Not a defect when
There is no such case: a null reference is undefined behavior the moment it exists, so the code always needs Option<&T> and None instead.
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::transmuting_null=off .
rust-doctor --rule clippy::transmuting_null=error .