Static rustc_lint::builtin::DEREF_NULLPTR
source · pub static DEREF_NULLPTR: &Lint
Expand description
The deref_nullptr
lint detects when an null pointer is dereferenced,
which causes undefined behavior.
Example
use std::ptr;
unsafe {
let x = &*ptr::null::<i32>();
let x = ptr::addr_of!(*ptr::null::<i32>());
let x = *(0 as *const i32);
}
{{produces}}
Explanation
Dereferencing a null pointer causes undefined behavior even as a place expression,
like &*(0 as *const i32)
or addr_of!(*(0 as *const i32))
.