45 lines
1.8 KiB
Text
45 lines
1.8 KiB
Text
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warning: default bound relaxed for a type parameter, but this does nothing because the given bound is not a default; only `?Sized` is supported
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--> $DIR/issue-87199.rs:8:8
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LL | fn arg<T: ?Send>(_: T) {}
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| ^
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warning: default bound relaxed for a type parameter, but this does nothing because the given bound is not a default; only `?Sized` is supported
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--> $DIR/issue-87199.rs:11:12
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LL | fn ref_arg<T: ?Send>(_: &T) {}
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| ^
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warning: default bound relaxed for a type parameter, but this does nothing because the given bound is not a default; only `?Sized` is supported
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--> $DIR/issue-87199.rs:13:13
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LL | fn ret() -> impl Iterator<Item = ()> + ?Send { std::iter::empty() }
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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error[E0277]: the size for values of type `impl Iterator+?Sized` cannot be known at compilation time
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--> $DIR/issue-87199.rs:13:13
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LL | fn ret() -> impl Iterator<Item = ()> + ?Send { std::iter::empty() }
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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 `impl Iterator+?Sized`
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= note: the return type of a function must have a statically known size
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error[E0277]: the size for values of type `T` cannot be known at compilation time
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--> $DIR/issue-87199.rs:8:18
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LL | fn arg<T: ?Send>(_: T) {}
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| - ^ doesn't have a size known at compile-time
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| this type parameter needs to be `std::marker::Sized`
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= help: unsized fn params are gated as an unstable feature
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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 arg<T: ?Send>(_: &T) {}
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| ^
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error: aborting due to 2 previous errors; 3 warnings emitted
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For more information about this error, try `rustc --explain E0277`.
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