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6efddac288
Expand the primary span of E0277 when the immediate unmet bound is not what the user wrote:
```
error[E0277]: the trait bound `i32: Bar` is not satisfied
--> f100.rs:6:6
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6 | <i32 as Foo>::foo();
| ^^^ the trait `Bar` is not implemented for `i32`, which is required by `i32: Foo`
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help: this trait has no implementations, consider adding one
--> f100.rs:2:1
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2 | trait Bar {}
| ^^^^^^^^^
note: required for `i32` to implement `Foo`
--> f100.rs:3:14
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3 | impl<T: Bar> Foo for T {}
| --- ^^^ ^
| |
| unsatisfied trait bound introduced here
```
Fix #40120.
23 lines
1.1 KiB
Plaintext
23 lines
1.1 KiB
Plaintext
error[E0277]: `Foo<T, U>` cannot be sent between threads safely
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--> $DIR/issue-83857-ub.rs:22:38
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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>`, which is required by `Foo<T, U>: WithAssoc`
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note: required for `Foo<T, U>` to implement `WithAssoc`
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--> $DIR/issue-83857-ub.rs:15:15
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LL | impl<T: Send> WithAssoc for T {
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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: aborting due to 1 previous error
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For more information about this error, try `rustc --explain E0277`.
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