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36 lines
1.2 KiB
Plaintext
36 lines
1.2 KiB
Plaintext
error[E0277]: the size for values of type `dyn Trait` cannot be known at compilation time
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--> $DIR/unsized_coercion.rs:15:17
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LL | let x = hello();
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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 Trait`
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error[E0308]: mismatched types
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--> $DIR/unsized_coercion.rs:19:5
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LL | fn hello() -> Box<impl Trait> {
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| ---------------
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| | |
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| | the expected opaque type
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| expected `Box<impl Trait>` because of return type
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...
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LL | Box::new(1u32)
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| ^^^^^^^^^^^^^^ types differ
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= note: expected struct `Box<impl Trait>`
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found struct `Box<u32>`
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error[E0277]: the size for values of type `dyn Trait` cannot be known at compilation time
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--> $DIR/unsized_coercion.rs:12:1
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LL | fn hello() -> Box<impl Trait> {
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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 Trait`
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error: aborting due to 3 previous errors
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Some errors have detailed explanations: E0277, E0308.
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For more information about an error, try `rustc --explain E0277`.
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