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error[E0277]: the size for values of type `T` cannot be known at compilation time
--> $DIR/unsized-fn-arg.rs:5:20
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LL | fn f<T: ?Sized>(t: T) {}
| - ^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `Sized`
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= help: unsized fn params are gated as an unstable feature
help: consider removing the `?Sized` bound to make the type parameter `Sized`
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LL - fn f<T: ?Sized>(t: T) {}
LL + fn f<T>(t: T) {}
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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 f<T: ?Sized>(t: &T) {}
| +
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0277`.
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