error[E0310]: the parameter type `U` may not live long enough --> $DIR/regions-close-object-into-object-4.rs:9:5 | LL | Box::new(B(&*v)) as Box | ^^^^^^^^ | | | the parameter type `U` must be valid for the static lifetime... | ...so that the type `U` will meet its required lifetime bounds | help: consider adding an explicit lifetime bound | LL | fn i<'a, T, U: 'static>(v: Box+'a>) -> Box { | +++++++++ error[E0310]: the parameter type `U` may not live long enough --> $DIR/regions-close-object-into-object-4.rs:9:5 | LL | Box::new(B(&*v)) as Box | ^^^^^^^^^^^^^^^^ | | | the parameter type `U` must be valid for the static lifetime... | ...so that the type `U` will meet its required lifetime bounds | help: consider adding an explicit lifetime bound | LL | fn i<'a, T, U: 'static>(v: Box+'a>) -> Box { | +++++++++ error[E0310]: the parameter type `U` may not live long enough --> $DIR/regions-close-object-into-object-4.rs:9:5 | LL | Box::new(B(&*v)) as Box | ^^^^^^^^^^^^^^^^ | | | the parameter type `U` must be valid for the static lifetime... | ...so that the type `U` will meet its required lifetime bounds | = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` help: consider adding an explicit lifetime bound | LL | fn i<'a, T, U: 'static>(v: Box+'a>) -> Box { | +++++++++ error: lifetime may not live long enough --> $DIR/regions-close-object-into-object-4.rs:9:5 | LL | fn i<'a, T, U>(v: Box+'a>) -> Box { | -- lifetime `'a` defined here LL | Box::new(B(&*v)) as Box | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ returning this value requires that `'a` must outlive `'static` | help: consider changing the trait object's explicit `'static` bound to the lifetime of argument `v` | LL | fn i<'a, T, U>(v: Box+'a>) -> Box { | ~~ help: alternatively, add an explicit `'static` bound to this reference | LL | fn i<'a, T, U>(v: Box<(dyn A + 'static)>) -> Box { | ~~~~~~~~~~~~~~~~~~~~~~~~~ error[E0515]: cannot return value referencing local data `*v` --> $DIR/regions-close-object-into-object-4.rs:9:5 | LL | Box::new(B(&*v)) as Box | ^^^^^^^^^^^---^^^^^^^^^^^^^^^^ | | | | | `*v` is borrowed here | returns a value referencing data owned by the current function error[E0310]: the parameter type `U` may not live long enough --> $DIR/regions-close-object-into-object-4.rs:9:14 | LL | Box::new(B(&*v)) as Box | ^^^^^^ | | | the parameter type `U` must be valid for the static lifetime... | ...so that the type `U` will meet its required lifetime bounds | help: consider adding an explicit lifetime bound | LL | fn i<'a, T, U: 'static>(v: Box+'a>) -> Box { | +++++++++ error: aborting due to 6 previous errors Some errors have detailed explanations: E0310, E0515. For more information about an error, try `rustc --explain E0310`.