1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
|
error[E0740]: field must implement `Copy` or be wrapped in `ManuallyDrop<...>` to be used in a union
--> $DIR/union-with-drop-fields.rs:11:5
|
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/union-with-drop-fields.rs:19:5
|
LL | a: S,
| ^^^^
|
= 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<S>,
| +++++++++++++++++++++++ +
error[E0740]: field must implement `Copy` or be wrapped in `ManuallyDrop<...>` to be used in a union
--> $DIR/union-with-drop-fields.rs:24:5
|
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: aborting due to 3 previous errors
For more information about this error, try `rustc --explain E0740`.
|
