35 lines
1.3 KiB
Plaintext
35 lines
1.3 KiB
Plaintext
warning: trait objects without an explicit `dyn` are deprecated
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--> $DIR/not-on-bare-trait.rs:7:12
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LL | fn foo(_x: Foo + Send) {
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| ^^^^^^^^^^
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= warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
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= note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
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= note: `#[warn(bare_trait_objects)]` on by default
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help: use `dyn`
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LL | fn foo(_x: dyn Foo + Send) {
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| +++
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error[E0277]: the size for values of type `(dyn Foo + Send + 'static)` cannot be known at compilation time
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--> $DIR/not-on-bare-trait.rs:7:8
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LL | fn foo(_x: Foo + Send) {
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| ^^ doesn't have a size known at compile-time
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= help: the trait `Sized` is not implemented for `(dyn Foo + Send + 'static)`
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= help: unsized fn params are gated as an unstable feature
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help: you can use `impl Trait` as the argument type
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LL | fn foo(_x: impl Foo + Send) {
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| ++++
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help: function arguments must have a statically known size, borrowed types always have a known size
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LL | fn foo(_x: &Foo + Send) {
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| +
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error: aborting due to 1 previous error; 1 warning emitted
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For more information about this error, try `rustc --explain E0277`.
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