pub static MISSING_UNSAFE_ON_EXTERN: &Lint
Expand description
The missing_unsafe_on_extern
lint detects missing unsafe keyword on extern declarations.
§Example
#![warn(missing_unsafe_on_extern)]
#![allow(dead_code)]
extern "C" {
fn foo(_: i32);
}
fn main() {}
{{produces}}
§Explanation
Declaring extern items, even without ever using them, can cause Undefined Behavior. We should consider all sources of Undefined Behavior to be unsafe.
This is a future-incompatible lint to transition this to a hard error in the future.