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error[E0658]: cannot cast `dyn Bar` to `dyn Foo`, trait upcasting coercion is experimental
--> $DIR/feature-gate-trait_upcasting.rs:11:25
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LL | let foo: &dyn Foo = bar;
| ^^^
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= note: see issue #65991 <https://github.com/rust-lang/rust/issues/65991> for more information
= help: add `#![feature(trait_upcasting)]` to the crate attributes to enable
= note: required when coercing `&dyn Bar` into `&dyn Foo`
error: aborting due to previous error
For more information about this error, try `rustc --explain E0658`.
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