mirror of https://github.com/rust-lang/rust
34 lines
1.6 KiB
Plaintext
34 lines
1.6 KiB
Plaintext
error[E0038]: the trait `FromResidual` cannot be made into an object
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--> $DIR/canonicalize-fresh-infer-vars-issue-103626.rs:10:17
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LL | let b: &dyn FromResidual = &();
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| ^^^^^^^^^^^^
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= note: it cannot use `Self` as a type parameter in a supertrait or `where`-clause
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error[E0038]: the trait `FromResidual` cannot be made into an object
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--> $DIR/canonicalize-fresh-infer-vars-issue-103626.rs:10:12
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LL | let b: &dyn FromResidual = &();
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| ^^^^^^^^^^^^^^^^^ `FromResidual` 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/canonicalize-fresh-infer-vars-issue-103626.rs:2:8
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LL | trait FromResidual<R = <Self as Try>::Residual> {
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| ------------ this trait cannot be made into an object...
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LL | fn from_residual(residual: R) -> Self;
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| ^^^^^^^^^^^^^ ...because associated function `from_residual` has no `self` parameter
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help: consider turning `from_residual` into a method by giving it a `&self` argument
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LL | fn from_residual(&self, residual: R) -> Self;
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| ++++++
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help: alternatively, consider constraining `from_residual` so it does not apply to trait objects
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LL | fn from_residual(residual: R) -> Self where Self: Sized;
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| +++++++++++++++++
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error: aborting due to 2 previous errors
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For more information about this error, try `rustc --explain E0038`.
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