mirror of https://github.com/rust-lang/rust
30 lines
1.2 KiB
Plaintext
30 lines
1.2 KiB
Plaintext
error: lifetime may not live long enough
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--> $DIR/regions-close-object-into-object-2.rs:9:5
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LL | fn g<'a, T: 'static>(v: Box<dyn A<T> + 'a>) -> Box<dyn X + 'static> {
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| -- lifetime `'a` defined here
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LL | Box::new(B(&*v)) as Box<dyn X>
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ returning this value requires that `'a` must outlive `'static`
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help: consider changing the trait object's explicit `'static` bound to the lifetime of argument `v`
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LL | fn g<'a, T: 'static>(v: Box<dyn A<T> + 'a>) -> Box<dyn X + 'a> {
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| ~~
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help: alternatively, add an explicit `'static` bound to this reference
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LL | fn g<'a, T: 'static>(v: Box<(dyn A<T> + 'static)>) -> Box<dyn X + 'static> {
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| ~~~~~~~~~~~~~~~~~~~~~~~~~
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error[E0515]: cannot return value referencing local data `*v`
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--> $DIR/regions-close-object-into-object-2.rs:9:5
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LL | Box::new(B(&*v)) as Box<dyn X>
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| ^^^^^^^^^^^---^^^^^^^^^^^^^^^^
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| | |
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| | `*v` is borrowed here
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| returns a value referencing data owned by the current function
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error: aborting due to 2 previous errors
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For more information about this error, try `rustc --explain E0515`.
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