66 lines
2.5 KiB
Plaintext
66 lines
2.5 KiB
Plaintext
error[E0478]: lifetime bound not satisfied
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--> $DIR/regions-trait-object-subtyping.rs:25:5
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LL | x //~ ERROR lifetime bound not satisfied
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| ^
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note: lifetime parameter instantiated with the lifetime 'a as defined on the function body at 23:9
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--> $DIR/regions-trait-object-subtyping.rs:23:9
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LL | fn foo3<'a,'b>(x: &'a mut Dummy) -> &'b mut Dummy {
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| ^^
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note: but lifetime parameter must outlive the lifetime 'b as defined on the function body at 23:12
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--> $DIR/regions-trait-object-subtyping.rs:23:12
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LL | fn foo3<'a,'b>(x: &'a mut Dummy) -> &'b mut Dummy {
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| ^^
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error[E0495]: cannot infer an appropriate lifetime for automatic coercion due to conflicting requirements
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--> $DIR/regions-trait-object-subtyping.rs:25:5
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LL | x //~ ERROR lifetime bound not satisfied
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| ^
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note: first, the lifetime cannot outlive the lifetime 'a as defined on the function body at 23:9...
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--> $DIR/regions-trait-object-subtyping.rs:23:9
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LL | fn foo3<'a,'b>(x: &'a mut Dummy) -> &'b mut Dummy {
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| ^^
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note: ...so that the type `(dyn Dummy + 'a)` is not borrowed for too long
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--> $DIR/regions-trait-object-subtyping.rs:25:5
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LL | x //~ ERROR lifetime bound not satisfied
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| ^
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note: but, the lifetime must be valid for the lifetime 'b as defined on the function body at 23:12...
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--> $DIR/regions-trait-object-subtyping.rs:23:12
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LL | fn foo3<'a,'b>(x: &'a mut Dummy) -> &'b mut Dummy {
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| ^^
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= note: ...so that the expression is assignable:
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expected &'b mut (dyn Dummy + 'b)
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found &mut (dyn Dummy + 'b)
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error[E0308]: mismatched types
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--> $DIR/regions-trait-object-subtyping.rs:32:5
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LL | x //~ ERROR mismatched types
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| ^ lifetime mismatch
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= note: expected type `Wrapper<&'b mut (dyn Dummy + 'b)>`
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found type `Wrapper<&'a mut (dyn Dummy + 'a)>`
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note: the lifetime 'b as defined on the function body at 30:15...
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--> $DIR/regions-trait-object-subtyping.rs:30:15
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LL | fn foo4<'a:'b,'b>(x: Wrapper<&'a mut Dummy>) -> Wrapper<&'b mut Dummy> {
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| ^^
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note: ...does not necessarily outlive the lifetime 'a as defined on the function body at 30:9
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--> $DIR/regions-trait-object-subtyping.rs:30:9
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LL | fn foo4<'a:'b,'b>(x: Wrapper<&'a mut Dummy>) -> Wrapper<&'b mut Dummy> {
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| ^^
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error: aborting due to 3 previous errors
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Some errors occurred: E0308, E0478, E0495.
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For more information about an error, try `rustc --explain E0308`.
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