error[E0594]: cannot assign to `self.0`, which is behind a `&` reference --> $DIR/suggest-ref-mut.rs:7:9 | LL | self.0 = 32; | ^^^^^^^^^^^ `self` is a `&` reference, so the data it refers to cannot be written | help: consider changing this to be a mutable reference | LL | fn zap(&mut self) { | ~~~~~~~~~ error[E0594]: cannot assign to `*foo`, which is behind a `&` reference --> $DIR/suggest-ref-mut.rs:15:5 | LL | *foo = 32; | ^^^^^^^^^ `foo` is a `&` reference, so the data it refers to cannot be written | help: consider changing this to be a mutable reference | LL | let ref mut foo = 16; | +++ error[E0594]: cannot assign to `*bar`, which is behind a `&` reference --> $DIR/suggest-ref-mut.rs:19:9 | LL | *bar = 32; | ^^^^^^^^^ `bar` is a `&` reference, so the data it refers to cannot be written | help: consider changing this to be a mutable reference | LL | if let Some(ref mut bar) = Some(16) { | +++ error[E0594]: cannot assign to `*quo`, which is behind a `&` reference --> $DIR/suggest-ref-mut.rs:23:22 | LL | ref quo => { *quo = 32; }, | ^^^^^^^^^ `quo` is a `&` reference, so the data it refers to cannot be written | help: consider changing this to be a mutable reference | LL | ref mut quo => { *quo = 32; }, | +++ error: aborting due to 4 previous errors For more information about this error, try `rustc --explain E0594`.