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Point at statics and consts being mutable borrowed or written to:
```
error[E0594]: cannot assign to immutable static item `NUM`
--> $DIR/E0594.rs:4:5
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LL | static NUM: i32 = 18;
| --------------- this `static` cannot be written to
...
LL | NUM = 20;
| ^^^^^^^^ cannot assign
```
Point at the expression that couldn't be mutably borrowed from a pattern:
```
error[E0596]: cannot borrow data in a `&` reference as mutable
--> $DIR/mut-pattern-of-immutable-borrow.rs:19:14
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LL | match &arg.field {
| ---------- this cannot be borrowed as mutable
LL | Some(ref mut s) => s.push('a'),
| ^^^^^^^^^ cannot borrow as mutable
```
25 lines
800 B
Text
25 lines
800 B
Text
error[E0596]: cannot borrow `*x` as mutable, as it is behind a `&` reference
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--> $DIR/borrowck-object-mutability.rs:8:5
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LL | x.borrowed_mut();
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| ^ `x` is a `&` reference, so it cannot be borrowed as mutable
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help: consider changing this to be a mutable reference
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LL | fn borrowed_receiver(x: &mut dyn Foo) {
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| +++
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error[E0596]: cannot borrow `*x` as mutable, as `x` is not declared as mutable
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--> $DIR/borrowck-object-mutability.rs:18:5
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LL | x.borrowed_mut();
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| ^ cannot borrow as mutable
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help: consider changing this to be mutable
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LL | fn owned_receiver(mut x: Box<dyn Foo>) {
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error: aborting due to 2 previous errors
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For more information about this error, try `rustc --explain E0596`.
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