mirror of https://github.com/rust-lang/rust
38 lines
1.5 KiB
Plaintext
38 lines
1.5 KiB
Plaintext
error[E0277]: the size for values of type `<Self as Deref>::Target` cannot be known at compilation time
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--> $DIR/issue-42312.rs:4:12
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LL | fn baz(_: Self::Target) where Self: Deref {}
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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 `<Self as Deref>::Target`
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= help: unsized fn params are gated as an unstable feature
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help: consider further restricting the associated type
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LL | fn baz(_: Self::Target) where Self: Deref, <Self as Deref>::Target: Sized {}
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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 baz(_: &Self::Target) where Self: Deref {}
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| +
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error[E0277]: the size for values of type `(dyn ToString + 'static)` cannot be known at compilation time
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--> $DIR/issue-42312.rs:8:10
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LL | pub fn f(_: dyn ToString) {}
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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 ToString + '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 | pub fn f(_: impl ToString) {}
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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 | pub fn f(_: &dyn ToString) {}
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| +
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error: aborting due to 2 previous errors
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For more information about this error, try `rustc --explain E0277`.
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