not_unsafe_ptr_arg_deref does not trigger on type aliases and trait methods

Summary

If the raw pointer is used behind a type alias or the function is part of a trait, not_unsafe_ptr_arg_deref is not triggered.

Lint Name

not_unsafe_ptr_arg_deref

Reproducer

I tried this code:

trait Bad {
    fn f(x: *const u8) -> u8 {
        unsafe { *x }
    }
}

type Alias = *const u8;
pub fn bad(x: Alias) -> u8 {
    unsafe { *x }
}

pub fn main() {
    bad(0 as _);
}

Playground

I expected to see this happen: Lint for not_unsafe_ptr_arg_deref is triggered

Instead, this happened: Lint is not triggered

Version

No response

Run the linked Playground reproducer and inspect the not_unsafe_ptr_arg_deref lint entry point. Compare the raw-pointer cases involving the type alias and trait method with the existing behavior; done means the lint triggers for both cases without regressing the current lint behavior.