ptr_cast_constness suggests code from wrong context

[samueltardieu]

Summary

Code from macro shows up in suggestion

Reproducer

I tried this code:

#![deny(clippy::ptr_cast_constness)]
fn main() {
    let mut local = 4;
    let _ = std::ptr::addr_of_mut!(local) as *const _;
}

I expected to see this happen:

`4 |     let _ = std::ptr::addr_of_mut!(local) as *const _;
  |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try `pointer::cast_const`, a safer alternative: `std::ptr::addr_of_mut!(local).cast_const()`

Instead, this happened:

4 |     let _ = std::ptr::addr_of_mut!(local) as *const _;
  |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try `pointer::cast_const`, a safer alternative: `(&raw mut $place).cast_const()`

@rustbot claim
@rustbot label +I-suggestion-causes-error

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