| use std::ptr; |
| |
| // This code should remain unsafe because of the two unsafe operations here, |
| // even if in a hypothetical future we deem all &raw (const|mut) *ptr exprs safe. |
| |
| static mut BYTE: u8 = 0; |
| static mut BYTE_PTR: *mut u8 = ptr::addr_of_mut!(BYTE); |
| // An unsafe static's ident is a place expression in its own right, so despite the above being safe |
| // (it's fine to create raw refs to places!) the following derefs the ptr before creating its ref! |
| static mut DEREF_BYTE_PTR: *mut u8 = ptr::addr_of_mut!(*BYTE_PTR); |
| //~^ ERROR: use of mutable static |
| //~| ERROR: dereference of raw pointer |
| |
| fn main() { |
| let _ = unsafe { DEREF_BYTE_PTR }; |
| } |