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error[E0507]: cannot move out of `*v`, as `v` is a captured variable in an `FnMut` closure
--> $DIR/issue-4335.rs:6:20
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LL | fn f<'r, T>(v: &'r T) -> Box<dyn FnMut() -> T + 'r> {
| - captured outer variable
LL | id(Box::new(|| *v))
| ^^ move occurs because `*v` has type `T`, which does not implement the `Copy` trait
error[E0373]: closure may outlive the current function, but it borrows `v`, which is owned by the current function
--> $DIR/issue-4335.rs:6:17
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LL | id(Box::new(|| *v))
| ^^ - `v` is borrowed here
| |
| may outlive borrowed value `v`
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note: closure is returned here
--> $DIR/issue-4335.rs:6:5
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LL | id(Box::new(|| *v))
| ^^^^^^^^^^^^^^^^^^^
help: to force the closure to take ownership of `v` (and any other referenced variables), use the `move` keyword
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LL | id(Box::new(move || *v))
| ^^^^^^^
error: aborting due to 2 previous errors
Some errors have detailed explanations: E0373, E0507.
For more information about an error, try `rustc --explain E0373`.
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