rust/tests/ui/borrowck/borrowck-access-permissions.stderr
Obei Sideg 408eeae59d Improve wording of static_mut_ref
Rename `static_mut_ref` lint to `static_mut_refs`.
2024-02-18 06:01:40 +03:00

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warning: creating a mutable reference to mutable static is discouraged
--> $DIR/borrowck-access-permissions.rs:18:23
|
LL | let _y2 = &mut static_x_mut;
| ^^^^^^^^^^^^^^^^^ mutable reference to mutable static
|
= note: for more information, see issue #114447 <https://github.com/rust-lang/rust/issues/114447>
= note: this will be a hard error in the 2024 edition
= note: this mutable reference has lifetime `'static`, but if the static gets accessed (read or written) by any other means, or any other reference is created, then any further use of this mutable reference is Undefined Behavior
= note: `#[warn(static_mut_refs)]` on by default
help: use `addr_of_mut!` instead to create a raw pointer
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LL | let _y2 = addr_of_mut!(static_x_mut);
| ~~~~~~~~~~~~~~~~~~~~~~~~~~
error[E0596]: cannot borrow `x` as mutable, as it is not declared as mutable
--> $DIR/borrowck-access-permissions.rs:10:19
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LL | let _y1 = &mut x;
| ^^^^^^ cannot borrow as mutable
|
help: consider changing this to be mutable
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LL | let mut x = 1;
| +++
error[E0596]: cannot borrow immutable static item `static_x` as mutable
--> $DIR/borrowck-access-permissions.rs:16:19
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LL | let _y1 = &mut static_x;
| ^^^^^^^^^^^^^ cannot borrow as mutable
error[E0596]: cannot borrow `*box_x` as mutable, as `box_x` is not declared as mutable
--> $DIR/borrowck-access-permissions.rs:28:19
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LL | let _y1 = &mut *box_x;
| ^^^^^^^^^^^ cannot borrow as mutable
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help: consider changing this to be mutable
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LL | let mut box_x = Box::new(1);
| +++
error[E0596]: cannot borrow `*ref_x` as mutable, as it is behind a `&` reference
--> $DIR/borrowck-access-permissions.rs:37:19
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LL | let _y1 = &mut *ref_x;
| ^^^^^^^^^^^ `ref_x` is a `&` reference, so the data it refers to cannot be borrowed as mutable
|
help: consider changing this to be a mutable reference
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LL | let ref_x = &mut x;
| +++
error[E0596]: cannot borrow `*ptr_x` as mutable, as it is behind a `*const` pointer
--> $DIR/borrowck-access-permissions.rs:47:23
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LL | let _y1 = &mut *ptr_x;
| ^^^^^^^^^^^ `ptr_x` is a `*const` pointer, so the data it refers to cannot be borrowed as mutable
|
help: consider changing this to be a mutable pointer
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LL | let ptr_x: *const _ = &mut x;
| +++
error[E0596]: cannot borrow `*foo_ref.f` as mutable, as it is behind a `&` reference
--> $DIR/borrowck-access-permissions.rs:60:18
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LL | let _y = &mut *foo_ref.f;
| ^^^^^^^^^^^^^^^ `foo_ref` is a `&` reference, so the data it refers to cannot be borrowed as mutable
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help: consider changing this to be a mutable reference
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LL | let foo_ref = &mut foo;
| +++
error: aborting due to 6 previous errors; 1 warning emitted
For more information about this error, try `rustc --explain E0596`.