error[E0133]: dereference of raw pointer is unsafe and requires unsafe function or block --> $DIR/raw-ref-deref-without-unsafe.rs:10:56 | LL | static mut DEREF_BYTE_PTR: *mut u8 = ptr::addr_of_mut!(*BYTE_PTR); | ^^^^^^^^^ dereference of raw pointer | = note: raw pointers may be null, dangling or unaligned; they can violate aliasing rules and cause data races: all of these are undefined behavior error[E0133]: use of mutable static is unsafe and requires unsafe function or block --> $DIR/raw-ref-deref-without-unsafe.rs:10:57 | LL | static mut DEREF_BYTE_PTR: *mut u8 = ptr::addr_of_mut!(*BYTE_PTR); | ^^^^^^^^ use of mutable static | = note: mutable statics can be mutated by multiple threads: aliasing violations or data races will cause undefined behavior error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0133`.