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