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Diffstat (limited to 'src/test/ui/wf/wf-convert-unsafe-trait-obj-box.stderr')
| -rw-r--r-- | src/test/ui/wf/wf-convert-unsafe-trait-obj-box.stderr | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/src/test/ui/wf/wf-convert-unsafe-trait-obj-box.stderr b/src/test/ui/wf/wf-convert-unsafe-trait-obj-box.stderr new file mode 100644 index 000000000..29dfb585a --- /dev/null +++ b/src/test/ui/wf/wf-convert-unsafe-trait-obj-box.stderr @@ -0,0 +1,51 @@ +error[E0038]: the trait `Trait` cannot be made into an object + --> $DIR/wf-convert-unsafe-trait-obj-box.rs:16:33 + | +LL | let t_box: Box<dyn Trait> = Box::new(S); + | ^^^^^^^^^^^ `Trait` 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/wf-convert-unsafe-trait-obj-box.rs:6:14 + | +LL | trait Trait: Sized {} + | ----- ^^^^^ ...because it requires `Self: Sized` + | | + | this trait cannot be made into an object... + = note: required because of the requirements on the impl of `CoerceUnsized<Box<dyn Trait>>` for `Box<S>` + = note: required by cast to type `Box<dyn Trait>` + +error[E0038]: the trait `Trait` cannot be made into an object + --> $DIR/wf-convert-unsafe-trait-obj-box.rs:17:15 + | +LL | takes_box(Box::new(S)); + | ^^^^^^^^^^^ `Trait` 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/wf-convert-unsafe-trait-obj-box.rs:6:14 + | +LL | trait Trait: Sized {} + | ----- ^^^^^ ...because it requires `Self: Sized` + | | + | this trait cannot be made into an object... + = note: required because of the requirements on the impl of `CoerceUnsized<Box<dyn Trait>>` for `Box<S>` + = note: required by cast to type `Box<(dyn Trait + 'static)>` + +error[E0038]: the trait `Trait` cannot be made into an object + --> $DIR/wf-convert-unsafe-trait-obj-box.rs:15:5 + | +LL | Box::new(S) as Box<dyn Trait>; + | ^^^^^^^^^^^ `Trait` 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/wf-convert-unsafe-trait-obj-box.rs:6:14 + | +LL | trait Trait: Sized {} + | ----- ^^^^^ ...because it requires `Self: Sized` + | | + | this trait cannot be made into an object... + = note: required because of the requirements on the impl of `CoerceUnsized<Box<dyn Trait>>` for `Box<S>` + = note: required by cast to type `Box<dyn Trait>` + +error: aborting due to 3 previous errors + +For more information about this error, try `rustc --explain E0038`. |