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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`
```
67 lines
2.9 KiB
Plaintext
67 lines
2.9 KiB
Plaintext
error[E0277]: `Foo<T, U>` cannot be sent between threads safely
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--> $DIR/issue-83857-ub.rs:21:38
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LL | fn generic<T, U>(v: Foo<T, U>, f: fn(<Foo<T, U> as WithAssoc>::Output) -> i32) {
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `Foo<T, U>` cannot be sent between threads safely
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= help: the trait `Send` is not implemented for `Foo<T, U>`
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note: required for `Foo<T, U>` to implement `WithAssoc`
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--> $DIR/issue-83857-ub.rs:14:15
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LL | impl<T: Send> WithAssoc for T {
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| ---- ^^^^^^^^^ ^
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| |
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| unsatisfied trait bound introduced here
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help: consider introducing a `where` clause, but there might be an alternative better way to express this requirement
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LL | fn generic<T, U>(v: Foo<T, U>, f: fn(<Foo<T, U> as WithAssoc>::Output) -> i32) where Foo<T, U>: Send {
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| +++++++++++++++++++++
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error[E0277]: `Foo<T, U>` cannot be sent between threads safely
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--> $DIR/issue-83857-ub.rs:21:80
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LL | fn generic<T, U>(v: Foo<T, U>, f: fn(<Foo<T, U> as WithAssoc>::Output) -> i32) {
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| ________________________________________________________________________________^
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LL | |
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LL | |
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LL | | f(foo(v));
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LL | |
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LL | | }
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| |_^ `Foo<T, U>` cannot be sent between threads safely
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= help: the trait `Send` is not implemented for `Foo<T, U>`
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note: required for `Foo<T, U>` to implement `WithAssoc`
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--> $DIR/issue-83857-ub.rs:14:15
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LL | impl<T: Send> WithAssoc for T {
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| ---- ^^^^^^^^^ ^
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| |
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| unsatisfied trait bound introduced here
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help: consider introducing a `where` clause, but there might be an alternative better way to express this requirement
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LL | fn generic<T, U>(v: Foo<T, U>, f: fn(<Foo<T, U> as WithAssoc>::Output) -> i32) where Foo<T, U>: Send {
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| +++++++++++++++++++++
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error[E0277]: `Foo<T, U>` cannot be sent between threads safely
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--> $DIR/issue-83857-ub.rs:24:11
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LL | f(foo(v));
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| --- ^ `Foo<T, U>` cannot be sent between threads safely
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| required by a bound introduced by this call
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= help: the trait `Send` is not implemented for `Foo<T, U>`
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note: required by a bound in `foo`
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--> $DIR/issue-83857-ub.rs:28:11
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LL | fn foo<T: Send>(x: T) -> <T as WithAssoc>::Output {
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| ^^^^ required by this bound in `foo`
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help: consider introducing a `where` clause, but there might be an alternative better way to express this requirement
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LL | fn generic<T, U>(v: Foo<T, U>, f: fn(<Foo<T, U> as WithAssoc>::Output) -> i32) where Foo<T, U>: Send {
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| +++++++++++++++++++++
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error: aborting due to 3 previous errors
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For more information about this error, try `rustc --explain E0277`.
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