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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.
55 lines
2.2 KiB
Plaintext
55 lines
2.2 KiB
Plaintext
error[E0277]: the trait bound `Box<{integer}>: Copy` is not satisfied
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--> $DIR/kindck-inherited-copy-bound.rs:21:16
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LL | take_param(&x);
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| ---------- ^^ the trait `Copy` is not implemented for `Box<{integer}>`, which is required by `Box<{integer}>: Foo`
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| required by a bound introduced by this call
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note: required for `Box<{integer}>` to implement `Foo`
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--> $DIR/kindck-inherited-copy-bound.rs:14:14
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LL | impl<T:Copy> Foo for T {
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| ---- ^^^ ^
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| unsatisfied trait bound introduced here
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note: required by a bound in `take_param`
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--> $DIR/kindck-inherited-copy-bound.rs:17:17
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LL | fn take_param<T:Foo>(foo: &T) { }
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| ^^^ required by this bound in `take_param`
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error[E0038]: the trait `Foo` cannot be made into an object
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--> $DIR/kindck-inherited-copy-bound.rs:28:19
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LL | let z = &x as &dyn Foo;
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| ^^^^^^^^ `Foo` cannot be made into an object
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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>
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--> $DIR/kindck-inherited-copy-bound.rs:10:13
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LL | trait Foo : Copy {
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| --- ^^^^ ...because it requires `Self: Sized`
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| this trait cannot be made into an object...
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error[E0038]: the trait `Foo` cannot be made into an object
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--> $DIR/kindck-inherited-copy-bound.rs:28:13
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LL | let z = &x as &dyn Foo;
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| ^^ `Foo` cannot be made into an object
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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>
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--> $DIR/kindck-inherited-copy-bound.rs:10:13
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LL | trait Foo : Copy {
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| --- ^^^^ ...because it requires `Self: Sized`
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| this trait cannot be made into an object...
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= note: required for the cast from `&Box<{integer}>` to `&dyn Foo`
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error: aborting due to 3 previous errors
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Some errors have detailed explanations: E0038, E0277.
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For more information about an error, try `rustc --explain E0038`.
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