bjoernager/rust
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rust/src/test/ui/traits/trait-alias/trait-alias-object-fail.stderr

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pretty: trim paths of unique symbols If a symbol name can only be imported from one place for a type, and as long as it was not glob-imported anywhere in the current crate, we can trim its printed path and print only the name. This has wide implications on error messages with types, for example, shortening `std::vec::Vec` to just `Vec`, as long as there is no other `Vec` importable anywhere. This adds a new '-Z trim-diagnostic-paths=false' option to control this feature. On the good path, with no diagnosis printed, we should try to avoid issuing this query, so we need to prevent trimmed_def_paths query on several cases. This change also relies on a previous commit that differentiates between `Debug` and `Display` on various rustc types, where the latter is trimmed and presented to the user and the former is not.
2020-09-02 10:40:56 +03:00
error[E0038]: the trait `Eq` cannot be made into an object
tests: remove ignore directives from tests that mention core/alloc/std spans.
2020-04-01 04:10:13 +03:00
--> $DIR/trait-alias-object-fail.rs:7:13
Added WF checking for trait alias definitions.
2018-11-01 18:17:58 +00:00
|
Update tests
2019-03-09 15:03:44 +03:00
LL | let _: &dyn EqAlias = &123;
pretty: trim paths of unique symbols If a symbol name can only be imported from one place for a type, and as long as it was not glob-imported anywhere in the current crate, we can trim its printed path and print only the name. This has wide implications on error messages with types, for example, shortening `std::vec::Vec` to just `Vec`, as long as there is no other `Vec` importable anywhere. This adds a new '-Z trim-diagnostic-paths=false' option to control this feature. On the good path, with no diagnosis printed, we should try to avoid issuing this query, so we need to prevent trimmed_def_paths query on several cases. This change also relies on a previous commit that differentiates between `Debug` and `Display` on various rustc types, where the latter is trimmed and presented to the user and the former is not.
2020-09-02 10:40:56 +03:00
| ^^^^^^^^^^^ the trait `Eq` cannot be made into an object
Tweak "object unsafe" errors Fix #77598.
2020-10-15 17:23:45 -07:00
|
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>
--> $SRC_DIR/core/src/cmp.rs:LL:COL
Added WF checking for trait alias definitions.
2018-11-01 18:17:58 +00:00
|
Point at reason in object unsafe trait with `Self` in supertraits or `where`-clause
2020-02-02 12:51:30 -08:00
LL | pub trait Eq: PartialEq<Self> {
Tweak "object unsafe" errors Fix #77598.
2020-10-15 17:23:45 -07:00
| ^^^^^^^^^^^^^^^ the trait cannot be made into an object because it uses `Self` as a type parameter in this
Added WF checking for trait alias definitions.
2018-11-01 18:17:58 +00:00
pretty: trim paths of unique symbols If a symbol name can only be imported from one place for a type, and as long as it was not glob-imported anywhere in the current crate, we can trim its printed path and print only the name. This has wide implications on error messages with types, for example, shortening `std::vec::Vec` to just `Vec`, as long as there is no other `Vec` importable anywhere. This adds a new '-Z trim-diagnostic-paths=false' option to control this feature. On the good path, with no diagnosis printed, we should try to avoid issuing this query, so we need to prevent trimmed_def_paths query on several cases. This change also relies on a previous commit that differentiates between `Debug` and `Display` on various rustc types, where the latter is trimmed and presented to the user and the former is not.
2020-09-02 10:40:56 +03:00
error[E0191]: the value of the associated type `Item` (from trait `Iterator`) must be specified
tests: remove ignore directives from tests that mention core/alloc/std spans.
2020-04-01 04:10:13 +03:00
--> $DIR/trait-alias-object-fail.rs:9:17
Added WF checking for trait alias definitions.
2018-11-01 18:17:58 +00:00
|
Update tests
2019-03-09 15:03:44 +03:00
LL | let _: &dyn IteratorAlias = &vec![123].into_iter();
Tweak errors for missing associated types and type parameters
2019-12-12 14:48:46 -08:00
| ^^^^^^^^^^^^^ help: specify the associated type: `IteratorAlias<Item = Type>`
Added WF checking for trait alias definitions.
2018-11-01 18:17:58 +00:00
error: aborting due to 2 previous errors
hide `--explain` hint if error has no extended info
2019-04-17 13:26:38 -04:00
Some errors have detailed explanations: E0038, E0191.
Added WF checking for trait alias definitions.
2018-11-01 18:17:58 +00:00
For more information about an error, try `rustc --explain E0038`.
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