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error[E0596]: cannot borrow `*a` as mutable, as it is behind a `&` reference
--> $DIR/mut-arg-hint.rs:3:9
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LL | fn foo(mut a: &String) {
| ------- help: consider changing this to be a mutable reference: `&mut String`
LL | a.push_str("bar");
| ^^^^^^^^^^^^^^^^^ `a` is a `&` reference, so the data it refers to cannot be borrowed as mutable
error[E0596]: cannot borrow `*a` as mutable, as it is behind a `&` reference
--> $DIR/mut-arg-hint.rs:8:5
|
LL | pub fn foo<'a>(mut a: &'a String) {
| ---------- help: consider changing this to be a mutable reference: `&'a mut String`
LL | a.push_str("foo");
| ^^^^^^^^^^^^^^^^^ `a` is a `&` reference, so the data it refers to cannot be borrowed as mutable
error[E0596]: cannot borrow `*a` as mutable, as it is behind a `&` reference
--> $DIR/mut-arg-hint.rs:15:9
|
LL | pub fn foo(mut a: &String) {
| ------- help: consider changing this to be a mutable reference: `&mut String`
LL | a.push_str("foo");
| ^^^^^^^^^^^^^^^^^ `a` is a `&` reference, so the data it refers to cannot be borrowed as mutable
error: aborting due to 3 previous errors
For more information about this error, try `rustc --explain E0596`.
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