mirror of
https://github.com/rust-lang/rust
synced 2024-10-14 04:23:37 +00:00
d68f2a6b71
```
error[E0382]: use of moved value: `t`
--> $DIR/use_of_moved_value_copy_suggestions.rs:7:9
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LL | fn duplicate_t<T>(t: T) -> (T, T) {
| - move occurs because `t` has type `T`, which does not implement the `Copy` trait
...
LL | (t, t)
| - ^ value used here after move
| |
| value moved here
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help: if `T` implemented `Clone`, you could clone the value
--> $DIR/use_of_moved_value_copy_suggestions.rs:4:16
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LL | fn duplicate_t<T>(t: T) -> (T, T) {
| ^ consider constraining this type parameter with `Clone`
...
LL | (t, t)
| - you could clone this value
help: consider restricting type parameter `T`
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LL | fn duplicate_t<T: Copy>(t: T) -> (T, T) {
| ++++++
```
The `help` is new. On ADTs, we also extend the output with span labels:
```
error[E0507]: cannot move out of static item `FOO`
--> $DIR/issue-17718-static-move.rs:6:14
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LL | let _a = FOO;
| ^^^ move occurs because `FOO` has type `Foo`, which does not implement the `Copy` trait
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note: if `Foo` implemented `Clone`, you could clone the value
--> $DIR/issue-17718-static-move.rs:1:1
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LL | struct Foo;
| ^^^^^^^^^^ consider implementing `Clone` for this type
...
LL | let _a = FOO;
| --- you could clone this value
help: consider borrowing here
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LL | let _a = &FOO;
| +
```
99 lines
3.5 KiB
Plaintext
99 lines
3.5 KiB
Plaintext
warning: creating a mutable reference to mutable static is discouraged
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--> $DIR/issue-20801.rs:14:14
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LL | unsafe { &mut GLOBAL_MUT_T }
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| ^^^^^^^^^^^^^^^^^ mutable reference to mutable static
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= note: for more information, see issue #114447 <https://github.com/rust-lang/rust/issues/114447>
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= note: this will be a hard error in the 2024 edition
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= 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
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= note: `#[warn(static_mut_refs)]` on by default
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help: use `addr_of_mut!` instead to create a raw pointer
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LL | unsafe { addr_of_mut!(GLOBAL_MUT_T) }
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| ~~~~~~~~~~~~~~~~~~~~~~~~~~
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error[E0507]: cannot move out of a mutable reference
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--> $DIR/issue-20801.rs:27:22
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LL | let a = unsafe { *mut_ref() };
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| ^^^^^^^^^^ move occurs because value has type `T`, which does not implement the `Copy` trait
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note: if `T` implemented `Clone`, you could clone the value
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--> $DIR/issue-20801.rs:3:1
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LL | struct T(u8);
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| ^^^^^^^^ consider implementing `Clone` for this type
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...
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LL | let a = unsafe { *mut_ref() };
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| ---------- you could clone this value
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help: consider removing the dereference here
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LL - let a = unsafe { *mut_ref() };
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LL + let a = unsafe { mut_ref() };
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error[E0507]: cannot move out of a shared reference
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--> $DIR/issue-20801.rs:30:22
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LL | let b = unsafe { *imm_ref() };
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| ^^^^^^^^^^ move occurs because value has type `T`, which does not implement the `Copy` trait
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note: if `T` implemented `Clone`, you could clone the value
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--> $DIR/issue-20801.rs:3:1
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LL | struct T(u8);
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| ^^^^^^^^ consider implementing `Clone` for this type
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...
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LL | let b = unsafe { *imm_ref() };
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| ---------- you could clone this value
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help: consider removing the dereference here
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LL - let b = unsafe { *imm_ref() };
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LL + let b = unsafe { imm_ref() };
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error[E0507]: cannot move out of a raw pointer
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--> $DIR/issue-20801.rs:33:22
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LL | let c = unsafe { *mut_ptr() };
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| ^^^^^^^^^^ move occurs because value has type `T`, which does not implement the `Copy` trait
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note: if `T` implemented `Clone`, you could clone the value
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--> $DIR/issue-20801.rs:3:1
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LL | struct T(u8);
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| ^^^^^^^^ consider implementing `Clone` for this type
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...
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LL | let c = unsafe { *mut_ptr() };
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| ---------- you could clone this value
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help: consider removing the dereference here
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LL - let c = unsafe { *mut_ptr() };
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LL + let c = unsafe { mut_ptr() };
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error[E0507]: cannot move out of a raw pointer
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--> $DIR/issue-20801.rs:36:22
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LL | let d = unsafe { *const_ptr() };
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| ^^^^^^^^^^^^ move occurs because value has type `T`, which does not implement the `Copy` trait
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note: if `T` implemented `Clone`, you could clone the value
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--> $DIR/issue-20801.rs:3:1
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LL | struct T(u8);
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| ^^^^^^^^ consider implementing `Clone` for this type
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...
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LL | let d = unsafe { *const_ptr() };
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| ------------ you could clone this value
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help: consider removing the dereference here
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LL - let d = unsafe { *const_ptr() };
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LL + let d = unsafe { const_ptr() };
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error: aborting due to 4 previous errors; 1 warning emitted
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For more information about this error, try `rustc --explain E0507`.
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