error[E0017]: references in constants may only refer to immutable values --> $DIR/E0017.rs:14:30 | LL | const CR: &'static mut i32 = &mut C; //~ ERROR E0017 | ^^^^^^ constants require immutable values error[E0017]: references in statics may only refer to immutable values --> $DIR/E0017.rs:15:39 | LL | static STATIC_REF: &'static mut i32 = &mut X; //~ ERROR E0017 | ^^^^^^ statics require immutable values error[E0596]: cannot borrow immutable static item as mutable --> $DIR/E0017.rs:15:44 | LL | static STATIC_REF: &'static mut i32 = &mut X; //~ ERROR E0017 | ^ error[E0017]: references in statics may only refer to immutable values --> $DIR/E0017.rs:17:38 | LL | static CONST_REF: &'static mut i32 = &mut C; //~ ERROR E0017 | ^^^^^^ statics require immutable values error: aborting due to 4 previous errors Some errors occurred: E0017, E0596. For more information about an error, try `rustc --explain E0017`.