a935064fae
Compiler: Rename "object safe" to "dyn compatible" Completed T-lang FCP: https://github.com/rust-lang/lang-team/issues/286#issuecomment-2338905118. Tracking issue: https://github.com/rust-lang/rust/issues/130852 Excludes `compiler/rustc_codegen_cranelift` (to be filed separately). Includes Stable MIR. Regarding https://github.com/rust-lang/rust/labels/relnotes, I guess I will manually open a https://github.com/rust-lang/rust/labels/relnotes-tracking-issue since this change affects everything (compiler, library, tools, docs, books, everyday language). r? ghost
52 lines
2.0 KiB
Plaintext
52 lines
2.0 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: if this is a dyn-compatible trait, 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:7:12
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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: &(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:12:12
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LL | fn bar(_x: (dyn 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 bar(_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 bar(_x: (&(dyn Foo + Send))) {
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| ++ +
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error: aborting due to 2 previous errors; 1 warning emitted
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For more information about this error, try `rustc --explain E0277`.
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