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89 lines
3.7 KiB
Text
89 lines
3.7 KiB
Text
warning: trait objects without an explicit `dyn` are deprecated
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--> $DIR/issue-116434-2015.rs:3:17
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LL | fn foo() -> Clone;
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| ^^^^^
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= warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
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= note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
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= note: `#[warn(bare_trait_objects)]` on by default
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help: if this is an object-safe trait, use `dyn`
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LL | fn foo() -> dyn Clone;
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| +++
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warning: trait objects without an explicit `dyn` are deprecated
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--> $DIR/issue-116434-2015.rs:18:20
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LL | fn handle() -> DbHandle;
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| ^^^^^^^^
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= warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
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= note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
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help: if this is an object-safe trait, use `dyn`
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LL | fn handle() -> dyn DbHandle;
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| +++
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warning: trait objects without an explicit `dyn` are deprecated
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--> $DIR/issue-116434-2015.rs:3:17
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LL | fn foo() -> Clone;
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| ^^^^^
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= warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
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= note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
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= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
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help: if this is an object-safe trait, use `dyn`
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LL | fn foo() -> dyn Clone;
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| +++
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error[E0038]: the trait `Clone` cannot be made into an object
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--> $DIR/issue-116434-2015.rs:3:17
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LL | fn foo() -> Clone;
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| ^^^^^ `Clone` cannot be made into an object
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= note: the trait cannot be made into an object because it requires `Self: Sized`
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= note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety>
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help: there is an associated type with the same name
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LL | fn foo() -> Self::Clone;
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| ++++++
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warning: trait objects without an explicit `dyn` are deprecated
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--> $DIR/issue-116434-2015.rs:18:20
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LL | fn handle() -> DbHandle;
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| ^^^^^^^^
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= warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
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= note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
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= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
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help: if this is an object-safe trait, use `dyn`
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LL | fn handle() -> dyn DbHandle;
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| +++
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error[E0038]: the trait `DbHandle` cannot be made into an object
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--> $DIR/issue-116434-2015.rs:18:20
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LL | fn handle() -> DbHandle;
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| ^^^^^^^^ `DbHandle` cannot be made into an object
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note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety>
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--> $DIR/issue-116434-2015.rs:14:17
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LL | trait DbHandle: Sized {}
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| -------- ^^^^^ ...because it requires `Self: Sized`
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| |
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| this trait cannot be made into an object...
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help: there is an associated type with the same name
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LL | fn handle() -> Self::DbHandle;
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| ++++++
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error: aborting due to 2 previous errors; 4 warnings emitted
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For more information about this error, try `rustc --explain E0038`.
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