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When encountering a moved value of a type that isn't `Clone` because of unmet obligations, but where all the unmet predicates reference crate-local types, mention them and suggest cloning, as we do in other cases already:
```
error[E0507]: cannot move out of `foo`, a captured variable in an `Fn` closure
--> f111.rs:14:25
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13 | fn do_stuff(foo: Option<Foo>) {
| --- captured outer variable
14 | require_fn_trait(|| async {
| -- ^^^^^ `foo` is moved here
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| captured by this `Fn` closure
15 | if foo.map_or(false, |f| f.foo()) {
| ---
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| variable moved due to use in coroutine
| move occurs because `foo` has type `Option<Foo>`, which does not implement the `Copy` trait
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note: if `Foo` implemented `Clone`, you could clone the value
--> f111.rs:4:1
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4 | struct Foo;
| ^^^^^^^^^^ consider implementing `Clone` for this type
...
15 | if foo.map_or(false, |f| f.foo()) {
| --- you could clone this value
```
111 lines
4.2 KiB
Plaintext
111 lines
4.2 KiB
Plaintext
error[E0502]: cannot borrow `u` (via `u.y`) as immutable because it is also borrowed as mutable (via `u.x`)
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--> $DIR/union-borrow-move-parent-sibling.rs:53:13
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LL | let a = &mut (*u.x).0;
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| --- mutable borrow occurs here (via `u.x`)
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LL | let b = &u.y;
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| ^^^^ immutable borrow of `u.y` -- which overlaps with `u.x` -- occurs here
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LL | use_borrow(a);
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| - mutable borrow later used here
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= note: `u.y` is a field of the union `U`, so it overlaps the field `u.x`
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error[E0507]: cannot move out of dereference of `ManuallyDrop<((MockVec<u8>, MockVec<u8>), MockVec<u8>)>`
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--> $DIR/union-borrow-move-parent-sibling.rs:59:13
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LL | let a = u.x.0;
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| ^^^^^ move occurs because value has type `(MockVec<u8>, MockVec<u8>)`, which does not implement the `Copy` trait
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help: consider borrowing here
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LL | let a = &u.x.0;
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| +
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error[E0382]: use of moved value: `u`
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--> $DIR/union-borrow-move-parent-sibling.rs:61:13
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LL | let u = U { x: ManuallyDrop::new(((MockVec::new(), MockVec::new()), MockVec::new())) };
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| - move occurs because `u` has type `U`, which does not implement the `Copy` trait
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LL | let a = u.x.0;
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LL | let a = u.x;
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| --- value moved here
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LL | let b = u.y;
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| ^^^ value used here after move
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note: if `U` implemented `Clone`, you could clone the value
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--> $DIR/union-borrow-move-parent-sibling.rs:43:1
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LL | union U {
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| ^^^^^^^ consider implementing `Clone` for this type
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...
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LL | let a = u.x;
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| --- you could clone this value
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error[E0502]: cannot borrow `u` (via `u.y`) as immutable because it is also borrowed as mutable (via `u.x`)
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--> $DIR/union-borrow-move-parent-sibling.rs:67:13
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LL | let a = &mut ((*u.x).0).0;
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| --- mutable borrow occurs here (via `u.x`)
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LL | let b = &u.y;
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| ^^^^ immutable borrow of `u.y` -- which overlaps with `u.x` -- occurs here
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LL | use_borrow(a);
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| - mutable borrow later used here
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= note: `u.y` is a field of the union `U`, so it overlaps the field `u.x`
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error[E0507]: cannot move out of dereference of `ManuallyDrop<((MockVec<u8>, MockVec<u8>), MockVec<u8>)>`
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--> $DIR/union-borrow-move-parent-sibling.rs:73:13
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LL | let a = (u.x.0).0;
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| ^^^^^^^^^ move occurs because value has type `MockVec<u8>`, which does not implement the `Copy` trait
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note: if `MockVec<u8>` implemented `Clone`, you could clone the value
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--> $DIR/union-borrow-move-parent-sibling.rs:25:1
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LL | struct MockVec<T> {
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| ^^^^^^^^^^^^^^^^^ consider implementing `Clone` for this type
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...
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LL | let a = (u.x.0).0;
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| --------- you could clone this value
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help: consider borrowing here
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LL | let a = &(u.x.0).0;
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error[E0382]: use of moved value: `u`
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--> $DIR/union-borrow-move-parent-sibling.rs:75:13
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LL | let u = U { x: ManuallyDrop::new(((MockVec::new(), MockVec::new()), MockVec::new())) };
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| - move occurs because `u` has type `U`, which does not implement the `Copy` trait
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LL | let a = (u.x.0).0;
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LL | let a = u.x;
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| --- value moved here
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LL | let b = u.y;
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| ^^^ value used here after move
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note: if `U` implemented `Clone`, you could clone the value
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--> $DIR/union-borrow-move-parent-sibling.rs:43:1
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LL | union U {
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| ^^^^^^^ consider implementing `Clone` for this type
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...
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LL | let a = u.x;
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| --- you could clone this value
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error[E0502]: cannot borrow `u` (via `u.x`) as immutable because it is also borrowed as mutable (via `u.y`)
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--> $DIR/union-borrow-move-parent-sibling.rs:81:13
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LL | let a = &mut *u.y;
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| --- mutable borrow occurs here (via `u.y`)
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LL | let b = &u.x;
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| ^^^^ immutable borrow of `u.x` -- which overlaps with `u.y` -- occurs here
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LL | use_borrow(a);
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| - mutable borrow later used here
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= note: `u.x` is a field of the union `U`, so it overlaps the field `u.y`
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error: aborting due to 7 previous errors
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Some errors have detailed explanations: E0382, E0502, E0507.
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For more information about an error, try `rustc --explain E0382`.
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