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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.
21 lines
906 B
Plaintext
21 lines
906 B
Plaintext
error[E0277]: `Cell<i32>` cannot be shared between threads safely
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--> $DIR/mutexguard-sync.rs:11:15
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LL | test_sync(guard);
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| --------- ^^^^^ `Cell<i32>` cannot be shared between threads safely
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| required by a bound introduced by this call
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= help: the trait `Sync` is not implemented for `Cell<i32>`, which is required by `MutexGuard<'_, Cell<i32>>: Sync`
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= note: if you want to do aliasing and mutation between multiple threads, use `std::sync::RwLock` or `std::sync::atomic::AtomicI32` instead
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= note: required for `MutexGuard<'_, Cell<i32>>` to implement `Sync`
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note: required by a bound in `test_sync`
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--> $DIR/mutexguard-sync.rs:5:17
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LL | fn test_sync<T: Sync>(_t: T) {}
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| ^^^^ required by this bound in `test_sync`
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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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