5b54286640
Remove the "which is required by `{root_obligation}`" post-script in
"the trait `X` is not implemented for `Y`" explanation in E0277. This
information is already conveyed in the notes explaining requirements,
making it redundant while making the text (particularly in labels)
harder to read.
```
error[E0277]: the trait bound `NotCopy: Copy` is not satisfied
--> $DIR/wf-static-type.rs:10:13
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LL | static FOO: IsCopy<Option<NotCopy>> = IsCopy { t: None };
| ^^^^^^^^^^^^^^^^^^^^^^^ the trait `Copy` is not implemented for `NotCopy`
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= note: required for `Option<NotCopy>` to implement `Copy`
note: required by a bound in `IsCopy`
--> $DIR/wf-static-type.rs:7:17
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LL | struct IsCopy<T:Copy> { t: T }
| ^^^^ required by this bound in `IsCopy`
```
vs the prior
```
error[E0277]: the trait bound `NotCopy: Copy` is not satisfied
--> $DIR/wf-static-type.rs:10:13
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LL | static FOO: IsCopy<Option<NotCopy>> = IsCopy { t: None };
| ^^^^^^^^^^^^^^^^^^^^^^^ the trait `Copy` is not implemented for `NotCopy`, which is required by `Option<NotCopy>: Copy`
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= note: required for `Option<NotCopy>` to implement `Copy`
note: required by a bound in `IsCopy`
--> $DIR/wf-static-type.rs:7:17
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LL | struct IsCopy<T:Copy> { t: T }
| ^^^^ required by this bound in `IsCopy`
```
109 lines
3.7 KiB
Plaintext
109 lines
3.7 KiB
Plaintext
error[E0277]: the trait bound `(): Sub` is not satisfied
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--> $DIR/super-assoc-mismatch.rs:10:22
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LL | impl BoundOnSelf for () {}
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| ^^ the trait `Sub` is not implemented for `()`
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help: this trait has no implementations, consider adding one
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--> $DIR/super-assoc-mismatch.rs:7:1
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LL | trait Sub: Super<Assoc = u16> {}
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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note: required by a bound in `BoundOnSelf`
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--> $DIR/super-assoc-mismatch.rs:9:20
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LL | trait BoundOnSelf: Sub {}
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| ^^^ required by this bound in `BoundOnSelf`
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error[E0277]: the trait bound `(): Sub` is not satisfied
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--> $DIR/super-assoc-mismatch.rs:14:27
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LL | impl BoundOnParam<()> for () {}
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| ^^ the trait `Sub` is not implemented for `()`
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help: this trait has no implementations, consider adding one
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--> $DIR/super-assoc-mismatch.rs:7:1
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LL | trait Sub: Super<Assoc = u16> {}
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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note: required by a bound in `BoundOnParam`
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--> $DIR/super-assoc-mismatch.rs:13:23
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LL | trait BoundOnParam<T: Sub> {}
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| ^^^ required by this bound in `BoundOnParam`
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error[E0277]: the trait bound `(): Sub` is not satisfied
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--> $DIR/super-assoc-mismatch.rs:21:18
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LL | type Assoc = ();
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| ^^ the trait `Sub` is not implemented for `()`
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help: this trait has no implementations, consider adding one
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--> $DIR/super-assoc-mismatch.rs:7:1
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LL | trait Sub: Super<Assoc = u16> {}
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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note: required by a bound in `BoundOnAssoc::Assoc`
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--> $DIR/super-assoc-mismatch.rs:18:17
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LL | type Assoc: Sub;
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| ^^^ required by this bound in `BoundOnAssoc::Assoc`
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error[E0277]: the trait bound `(): Sub` is not satisfied
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--> $DIR/super-assoc-mismatch.rs:29:21
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LL | type Assoc<T> = ();
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| ^^ the trait `Sub` is not implemented for `()`
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help: this trait has no implementations, consider adding one
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--> $DIR/super-assoc-mismatch.rs:7:1
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LL | trait Sub: Super<Assoc = u16> {}
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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note: required by a bound in `BoundOnGat`
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--> $DIR/super-assoc-mismatch.rs:25:41
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LL | trait BoundOnGat where Self::Assoc<u8>: Sub {
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| ^^^ required by this bound in `BoundOnGat`
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error[E0277]: the trait bound `(): Sub` is not satisfied
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--> $DIR/super-assoc-mismatch.rs:33:26
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LL | fn trivial_bound() where (): Sub {}
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| ^^^^^^^ the trait `Sub` is not implemented for `()`
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help: this trait has no implementations, consider adding one
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--> $DIR/super-assoc-mismatch.rs:7:1
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LL | trait Sub: Super<Assoc = u16> {}
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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= help: see issue #48214
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help: add `#![feature(trivial_bounds)]` to the crate attributes to enable
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LL + #![feature(trivial_bounds)]
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error[E0277]: the trait bound `(): SubGeneric<u16>` is not satisfied
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--> $DIR/super-assoc-mismatch.rs:55:22
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LL | type Assoc1<T> = ();
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| ^^ the trait `SubGeneric<u16>` is not implemented for `()`
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help: this trait has no implementations, consider adding one
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--> $DIR/super-assoc-mismatch.rs:43:1
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LL | trait SubGeneric<T>: SuperGeneric<T, Assoc = T> {}
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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note: required by a bound in `MultiAssoc`
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--> $DIR/super-assoc-mismatch.rs:46:23
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LL | trait MultiAssoc
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| ---------- required by a bound in this trait
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LL | where
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LL | Self::Assoc1<()>: SubGeneric<Self::Assoc2>
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| ^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `MultiAssoc`
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error: aborting due to 6 previous errors
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For more information about this error, try `rustc --explain E0277`.
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