mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-23 23:34:48 +00:00
37 lines
1.6 KiB
Plaintext
37 lines
1.6 KiB
Plaintext
error[E0038]: the trait `Bar` cannot be made into an object
|
|
--> $DIR/issue-19538.rs:17:15
|
|
|
|
|
LL | let test: &mut dyn Bar = &mut thing;
|
|
| ^^^^^^^^^^^^ `Bar` 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/issue-19538.rs:2:8
|
|
|
|
|
LL | fn foo<T>(&self, val: T);
|
|
| ^^^ ...because method `foo` has generic type parameters
|
|
...
|
|
LL | trait Bar: Foo { }
|
|
| --- this trait cannot be made into an object...
|
|
= help: consider moving `foo` to another trait
|
|
|
|
error[E0038]: the trait `Bar` cannot be made into an object
|
|
--> $DIR/issue-19538.rs:17:30
|
|
|
|
|
LL | let test: &mut dyn Bar = &mut thing;
|
|
| ^^^^^^^^^^ `Bar` 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/issue-19538.rs:2:8
|
|
|
|
|
LL | fn foo<T>(&self, val: T);
|
|
| ^^^ ...because method `foo` has generic type parameters
|
|
...
|
|
LL | trait Bar: Foo { }
|
|
| --- this trait cannot be made into an object...
|
|
= help: consider moving `foo` to another trait
|
|
= note: required for the cast from `&mut Thing` to `&mut dyn Bar`
|
|
|
|
error: aborting due to 2 previous errors
|
|
|
|
For more information about this error, try `rustc --explain E0038`.
|