mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-23 23:34:48 +00:00
64 lines
2.4 KiB
Plaintext
64 lines
2.4 KiB
Plaintext
error[E0740]: field must implement `Copy` or be wrapped in `ManuallyDrop<...>` to be used in a union
|
|
--> $DIR/field_checks.rs:24:5
|
|
|
|
|
LL | a: String,
|
|
| ^^^^^^^^^
|
|
|
|
|
= note: union fields must not have drop side-effects, which is currently enforced via either `Copy` or `ManuallyDrop<...>`
|
|
help: wrap the field type in `ManuallyDrop<...>`
|
|
|
|
|
LL | a: std::mem::ManuallyDrop<String>,
|
|
| +++++++++++++++++++++++ +
|
|
|
|
error[E0740]: field must implement `Copy` or be wrapped in `ManuallyDrop<...>` to be used in a union
|
|
--> $DIR/field_checks.rs:28:5
|
|
|
|
|
LL | a: std::cell::RefCell<i32>,
|
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
|
|
|
|
|
= note: union fields must not have drop side-effects, which is currently enforced via either `Copy` or `ManuallyDrop<...>`
|
|
help: wrap the field type in `ManuallyDrop<...>`
|
|
|
|
|
LL | a: std::mem::ManuallyDrop<std::cell::RefCell<i32>>,
|
|
| +++++++++++++++++++++++ +
|
|
|
|
error[E0740]: field must implement `Copy` or be wrapped in `ManuallyDrop<...>` to be used in a union
|
|
--> $DIR/field_checks.rs:32:5
|
|
|
|
|
LL | a: T,
|
|
| ^^^^
|
|
|
|
|
= note: union fields must not have drop side-effects, which is currently enforced via either `Copy` or `ManuallyDrop<...>`
|
|
help: wrap the field type in `ManuallyDrop<...>`
|
|
|
|
|
LL | a: std::mem::ManuallyDrop<T>,
|
|
| +++++++++++++++++++++++ +
|
|
|
|
error[E0740]: field must implement `Copy` or be wrapped in `ManuallyDrop<...>` to be used in a union
|
|
--> $DIR/field_checks.rs:44:5
|
|
|
|
|
LL | nest: U5,
|
|
| ^^^^^^^^
|
|
|
|
|
= note: union fields must not have drop side-effects, which is currently enforced via either `Copy` or `ManuallyDrop<...>`
|
|
help: wrap the field type in `ManuallyDrop<...>`
|
|
|
|
|
LL | nest: std::mem::ManuallyDrop<U5>,
|
|
| +++++++++++++++++++++++ +
|
|
|
|
error[E0740]: field must implement `Copy` or be wrapped in `ManuallyDrop<...>` to be used in a union
|
|
--> $DIR/field_checks.rs:48:5
|
|
|
|
|
LL | nest: [U5; 0],
|
|
| ^^^^^^^^^^^^^
|
|
|
|
|
= note: union fields must not have drop side-effects, which is currently enforced via either `Copy` or `ManuallyDrop<...>`
|
|
help: wrap the field type in `ManuallyDrop<...>`
|
|
|
|
|
LL | nest: std::mem::ManuallyDrop<[U5; 0]>,
|
|
| +++++++++++++++++++++++ +
|
|
|
|
error: aborting due to 5 previous errors
|
|
|
|
For more information about this error, try `rustc --explain E0740`.
|