67 lines
3.1 KiB
Plaintext
67 lines
3.1 KiB
Plaintext
error[E0393]: the type parameter `R` must be explicitly specified
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--> $DIR/canonicalize-fresh-infer-vars-issue-103626.rs:10:17
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LL | trait FromResidual<R = <Self as Try>::Residual> {
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| ----------------------------------------------- type parameter `R` must be specified for this
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...
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LL | let b: &dyn FromResidual = &();
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| ^^^^^^^^^^^^
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= note: because the parameter default references `Self`, the parameter must be specified on the object type
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help: set the type parameter to the desired type
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LL | let b: &dyn FromResidual<R> = &();
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| +++
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error[E0038]: the trait `FromResidual` is not dyn compatible
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--> $DIR/canonicalize-fresh-infer-vars-issue-103626.rs:10:32
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LL | let b: &dyn FromResidual = &();
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| ^^^ `FromResidual` is not dyn compatible
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note: for a trait to be dyn compatible it needs to allow building a vtable
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for more information, visit <https://doc.rust-lang.org/reference/items/traits.html#dyn-compatibility>
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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 is not dyn compatible...
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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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= note: required for the cast from `&()` to `&dyn FromResidual<{type error}>`
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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[E0038]: the trait `FromResidual` is not dyn compatible
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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` is not dyn compatible
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note: for a trait to be dyn compatible it needs to allow building a vtable
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for more information, visit <https://doc.rust-lang.org/reference/items/traits.html#dyn-compatibility>
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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 is not dyn compatible...
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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 3 previous errors
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Some errors have detailed explanations: E0038, E0393.
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For more information about an error, try `rustc --explain E0038`.
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