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error[E0277]: the size for values of type `T` cannot be known at compilation time
--> $DIR/issue-27060-2.rs:3:11
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LL | pub struct Bad<T: ?Sized> {
| - this type parameter needs to be `std::marker::Sized`
LL | data: T,
| ^ doesn't have a size known at compile-time
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= note: the last field of a packed struct may only have a dynamically sized type if it does not need drop to be run
= help: change the field's type to have a statically known size
help: consider removing the `?Sized` bound to make the type parameter `Sized`
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LL - pub struct Bad<T: ?Sized> {
LL + pub struct Bad<T> {
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help: borrowed types always have a statically known size
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LL | data: &T,
| +
help: the `Box` type always has a statically known size and allocates its contents in the heap
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LL | data: Box<T>,
| ++++ +
error: aborting due to previous error
For more information about this error, try `rustc --explain E0277`.
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