error[E0308]: mismatched types
  --> $DIR/format-borrow.rs:2:21
   |
LL |     let a: String = &String::from("a");
   |            ------   ^^^^^^^^^^^^^^^^^^ expected struct `String`, found `&String`
   |            |
   |            expected due to this
   |
help: consider removing the borrow
   |
LL -     let a: String = &String::from("a");
LL +     let a: String = String::from("a");
   |
help: alternatively, consider changing the type annotation
   |
LL |     let a: &String = &String::from("a");
   |            +

error[E0308]: mismatched types
  --> $DIR/format-borrow.rs:4:21
   |
LL |     let b: String = &format!("b");
   |            ------   ^^^^^^^^^^^^^ expected struct `String`, found `&String`
   |            |
   |            expected due to this
   |
help: consider removing the borrow
   |
LL -     let b: String = &format!("b");
LL +     let b: String = format!("b");
   |
help: alternatively, consider changing the type annotation
   |
LL |     let b: &String = &format!("b");
   |            +

error[E0308]: mismatched types
  --> $DIR/format-borrow.rs:6:21
   |
LL |     let c: String = &mut format!("c");
   |            ------   ^^^^^^^^^^^^^^^^^ expected struct `String`, found `&mut String`
   |            |
   |            expected due to this
   |
help: consider removing the borrow
   |
LL -     let c: String = &mut format!("c");
LL +     let c: String = format!("c");
   |
help: alternatively, consider changing the type annotation
   |
LL |     let c: &mut String = &mut format!("c");
   |            ++++

error[E0308]: mismatched types
  --> $DIR/format-borrow.rs:8:21
   |
LL |     let d: String = &mut (format!("d"));
   |            ------   ^^^^^^^^^^^^^^^^^^^ expected struct `String`, found `&mut String`
   |            |
   |            expected due to this
   |
help: consider removing the borrow
   |
LL -     let d: String = &mut (format!("d"));
LL +     let d: String = format!("d"));
   |
help: alternatively, consider changing the type annotation
   |
LL |     let d: &mut String = &mut (format!("d"));
   |            ++++

error: aborting due to 4 previous errors

For more information about this error, try `rustc --explain E0308`.