8c04999226
When we encounter a `dyn Trait` that isn't object safe, look for its
implementors. If there's one, mention using it directly If there are
less than 9, mention the possibility of creating a new enum and using
that instead.
Account for object unsafe `impl Trait on dyn Trait {}`. Make a
distinction between public and sealed traits.
Fix #80194.
23 lines
1.1 KiB
Plaintext
23 lines
1.1 KiB
Plaintext
error[E0038]: the trait `Foo` cannot be made into an object
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--> $DIR/object-safety-err-ret.rs:17:16
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LL | fn use_dyn(v: &dyn Foo) {
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| ^^^^^^^ `Foo` cannot be made into an object
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note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety>
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--> $DIR/object-safety-err-ret.rs:8:8
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LL | trait Foo {
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| --- this trait cannot be made into an object...
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LL | fn test(&self) -> [u8; bar::<Self>()];
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| ^^^^ ^^^^^^^^^^^^^^^^^^^ ...because method `test` references the `Self` type in its return type
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| |
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| ...because method `test` references the `Self` type in its `where` clause
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= help: consider moving `test` to another trait
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= help: consider moving `test` to another trait
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= help: only type `()` implements the trait, consider using it directly instead
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error: aborting due to previous error
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For more information about this error, try `rustc --explain E0038`.
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