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ad9a5a5f9f
```
error[E0507]: cannot move out of `bar`, a captured variable in an `FnMut` closure
--> $DIR/borrowck-move-by-capture.rs:9:29
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LL | let bar: Box<_> = Box::new(3);
| --- captured outer variable
LL | let _g = to_fn_mut(|| {
| -- captured by this `FnMut` closure
LL | let _h = to_fn_once(move || -> isize { *bar });
| ^^^^^^^^^^^^^^^^ ----
| | |
| | variable moved due to use in closure
| | move occurs because `bar` has type `Box<isize>`, which does not implement the `Copy` trait
| `bar` is moved here
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help: clone the value before moving it into the closure
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LL ~ let value = bar.clone();
LL ~ let _h = to_fn_once(move || -> isize { value });
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```
31 lines
706 B
Rust
31 lines
706 B
Rust
#[derive(Debug)]
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struct NotCopyable;
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#[derive(Debug, Clone)]
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struct NotCopyableButCloneable;
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fn func<F: FnMut() -> H, H: FnMut()>(_: F) {}
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fn foo() {
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let var = NotCopyable;
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func(|| {
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// Shouldn't suggest `move ||.as_ref()` here
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move || { //~ ERROR cannot move out of `var`
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let x = var; //~ ERROR cannot move out of `var`
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println!("{x:?}");
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}
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});
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}
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fn bar() {
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let var = NotCopyableButCloneable;
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func(|| {
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// Shouldn't suggest `move ||.as_ref()` here
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move || { //~ ERROR cannot move out of `var`
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let x = var; //~ ERROR cannot move out of `var`
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println!("{x:?}");
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}
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});
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}
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fn main() {}
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