mirror of https://github.com/rust-lang/rust
28 lines
1.3 KiB
Plaintext
28 lines
1.3 KiB
Plaintext
error[E0277]: the size for values of type `V` cannot be known at compilation time
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--> $DIR/issue-unsized-tail-restatic-ice-122488.rs:5:61
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LL | struct ArenaSet<U: Deref, V: ?Sized = <U as Deref>::Target>(V, U);
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| -------------------------------- ^ doesn't have a size known at compile-time
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| this type parameter needs to be `Sized`
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= note: only the last field of a struct may have a dynamically sized type
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= help: change the field's type to have a statically known size
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help: consider removing the `?Sized` bound to make the type parameter `Sized`
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LL - struct ArenaSet<U: Deref, V: ?Sized = <U as Deref>::Target>(V, U);
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LL + struct ArenaSet<U: Deref, V = <U as Deref>::Target>(V, U);
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help: borrowed types always have a statically known size
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LL | struct ArenaSet<U: Deref, V: ?Sized = <U as Deref>::Target>(&V, U);
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| +
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help: the `Box` type always has a statically known size and allocates its contents in the heap
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LL | struct ArenaSet<U: Deref, V: ?Sized = <U as Deref>::Target>(Box<V>, U);
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| ++++ +
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error: aborting due to 1 previous error
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For more information about this error, try `rustc --explain E0277`.
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