mirror of https://github.com/rust-lang/rust.git
88 lines
4.0 KiB
Plaintext
88 lines
4.0 KiB
Plaintext
error[E0038]: the trait `Qux` cannot be made into an object
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--> $DIR/unsizing-wfcheck-issue-127299.rs:8:24
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LL | pub desc: &'static dyn Qux,
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| ^^^^^^^ `Qux` 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/unsizing-wfcheck-issue-127299.rs:4:8
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LL | trait Qux {
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| --- this trait cannot be made into an object...
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LL | fn bar() -> i32;
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| ^^^ ...because associated function `bar` has no `self` parameter
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help: consider turning `bar` into a method by giving it a `&self` argument
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LL | fn bar(&self) -> i32;
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| +++++
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help: alternatively, consider constraining `bar` so it does not apply to trait objects
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LL | fn bar() -> i32 where Self: Sized;
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| +++++++++++++++++
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error[E0277]: `(dyn Qux + 'static)` cannot be shared between threads safely
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--> $DIR/unsizing-wfcheck-issue-127299.rs:12:13
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LL | static FOO: &Lint = &Lint { desc: "desc" };
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| ^^^^^ `(dyn Qux + 'static)` cannot be shared between threads safely
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= help: within `&'static Lint`, the trait `Sync` is not implemented for `(dyn Qux + 'static)`, which is required by `&'static Lint: Sync`
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= note: required because it appears within the type `&'static (dyn Qux + 'static)`
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note: required because it appears within the type `Lint`
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--> $DIR/unsizing-wfcheck-issue-127299.rs:7:12
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LL | pub struct Lint {
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| ^^^^
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= note: required because it appears within the type `&'static Lint`
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= note: shared static variables must have a type that implements `Sync`
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error[E0038]: the trait `Qux` cannot be made into an object
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--> $DIR/unsizing-wfcheck-issue-127299.rs:12:35
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LL | static FOO: &Lint = &Lint { desc: "desc" };
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| ^^^^^^ `Qux` 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/unsizing-wfcheck-issue-127299.rs:4:8
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LL | trait Qux {
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| --- this trait cannot be made into an object...
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LL | fn bar() -> i32;
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| ^^^ ...because associated function `bar` has no `self` parameter
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= note: required for the cast from `&'static str` to `&'static (dyn Qux + 'static)`
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help: consider turning `bar` into a method by giving it a `&self` argument
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LL | fn bar(&self) -> i32;
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| +++++
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help: alternatively, consider constraining `bar` so it does not apply to trait objects
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LL | fn bar() -> i32 where Self: Sized;
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| +++++++++++++++++
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error[E0038]: the trait `Qux` cannot be made into an object
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--> $DIR/unsizing-wfcheck-issue-127299.rs:12:35
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LL | static FOO: &Lint = &Lint { desc: "desc" };
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| ^^^^^^ `Qux` 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/unsizing-wfcheck-issue-127299.rs:4:8
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LL | trait Qux {
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| --- this trait cannot be made into an object...
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LL | fn bar() -> i32;
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| ^^^ ...because associated function `bar` has no `self` parameter
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help: consider turning `bar` into a method by giving it a `&self` argument
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LL | fn bar(&self) -> i32;
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| +++++
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help: alternatively, consider constraining `bar` so it does not apply to trait objects
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LL | fn bar() -> i32 where Self: Sized;
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| +++++++++++++++++
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error: aborting due to 4 previous errors
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Some errors have detailed explanations: E0038, E0277.
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For more information about an error, try `rustc --explain E0038`.
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