Static rustc_lint::builtin::INVALID_VALUE

pub static INVALID_VALUE: &Lint

The invalid_value lint detects creating a value that is not valid, such as a null reference.

Example

unsafe {
    let x: &'static i32 = std::mem::zeroed();
}

{{produces}}

Explanation

In some situations the compiler can detect that the code is creating an invalid value, which should be avoided.

In particular, this lint will check for improper use of mem::zeroed, mem::uninitialized, mem::transmute, and MaybeUninit::assume_init that can cause undefined behavior. The lint should provide extra information to indicate what the problem is and a possible solution.