error: any use of this value will cause an error --> $DIR/partial_ptr_overwrite.rs:8:9 | LL | const PARTIAL_OVERWRITE: () = { | --------------------------- ... LL | *(ptr as *mut u8) = 123; | ^^^^^^^^^^^^^^^^^^^^^^^ unable to overwrite parts of a pointer in memory at alloc4 | = note: `#[deny(const_err)]` on by default = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! = note: for more information, see issue #71800 = help: this code performed an operation that depends on the underlying bytes representing a pointer = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported error: aborting due to previous error Future incompatibility report: Future breakage diagnostic: error: any use of this value will cause an error --> $DIR/partial_ptr_overwrite.rs:8:9 | LL | const PARTIAL_OVERWRITE: () = { | --------------------------- ... LL | *(ptr as *mut u8) = 123; | ^^^^^^^^^^^^^^^^^^^^^^^ unable to overwrite parts of a pointer in memory at alloc4 | = note: `#[deny(const_err)]` on by default = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! = note: for more information, see issue #71800 = help: this code performed an operation that depends on the underlying bytes representing a pointer = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported