rust/tests/ui/resolve/issue-3907-2.stderr

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error[E0038]: the trait `issue_3907::Foo` cannot be made into an object
--> $DIR/issue-3907-2.rs:11:12
|
2018-02-23 00:42:32 +00:00
LL | fn bar(_x: Foo) {}
2020-10-20 00:57:18 +00:00
| ^^^ `issue_3907::Foo` 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/auxiliary/issue-3907.rs:2:8
|
LL | fn bar();
| ^^^ the trait cannot be made into an object because associated function `bar` has no `self` parameter
error[E0277]: the size for values of type `(dyn issue_3907::Foo + 'static)` cannot be known at compilation time
--> $DIR/issue-3907-2.rs:11:8
|
LL | fn bar(_x: Foo) {}
| ^^ doesn't have a size known at compile-time
|
= help: the trait `Sized` is not implemented for `(dyn issue_3907::Foo + 'static)`
= help: unsized fn params are gated as an unstable feature
help: function arguments must have a statically known size, borrowed types always have a known size
|
LL | fn bar(_x: &Foo) {}
| +
error: aborting due to 2 previous errors
Some errors have detailed explanations: E0038, E0277.
For more information about an error, try `rustc --explain E0038`.