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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.
67 lines
3.1 KiB
Plaintext
67 lines
3.1 KiB
Plaintext
error[E0666]: nested `impl Trait` is not allowed
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--> $DIR/nested_impl_trait.rs:6:56
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LL | fn bad_in_ret_position(x: impl Into<u32>) -> impl Into<impl Debug> { x }
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| ----------^^^^^^^^^^-
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| | |
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| | nested `impl Trait` here
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| outer `impl Trait`
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error[E0666]: nested `impl Trait` is not allowed
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--> $DIR/nested_impl_trait.rs:10:42
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LL | fn bad_in_fn_syntax(x: fn() -> impl Into<impl Debug>) {}
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| ----------^^^^^^^^^^-
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| | |
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| | nested `impl Trait` here
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| outer `impl Trait`
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error[E0666]: nested `impl Trait` is not allowed
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--> $DIR/nested_impl_trait.rs:14:37
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LL | fn bad_in_arg_position(_: impl Into<impl Debug>) { }
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| ----------^^^^^^^^^^-
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| | |
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| | nested `impl Trait` here
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| outer `impl Trait`
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error[E0666]: nested `impl Trait` is not allowed
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--> $DIR/nested_impl_trait.rs:19:44
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LL | fn bad(x: impl Into<u32>) -> impl Into<impl Debug> { x }
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| ----------^^^^^^^^^^-
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| | |
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| | nested `impl Trait` here
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| outer `impl Trait`
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error[E0562]: `impl Trait` is not allowed in `fn` pointer return types
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--> $DIR/nested_impl_trait.rs:10:32
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LL | fn bad_in_fn_syntax(x: fn() -> impl Into<impl Debug>) {}
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| ^^^^^^^^^^^^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0277]: the trait bound `impl Debug: From<impl Into<u32>>` is not satisfied
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--> $DIR/nested_impl_trait.rs:6:46
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LL | fn bad_in_ret_position(x: impl Into<u32>) -> impl Into<impl Debug> { x }
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| ^^^^^^^^^^^^^^^^^^^^^ the trait `From<impl Into<u32>>` is not implemented for `impl Debug`, which is required by `impl Into<u32>: Into<impl Debug>`
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= help: the trait `Into<U>` is implemented for `T`
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= note: required for `impl Into<u32>` to implement `Into<impl Debug>`
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error[E0277]: the trait bound `impl Debug: From<impl Into<u32>>` is not satisfied
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--> $DIR/nested_impl_trait.rs:19:34
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LL | fn bad(x: impl Into<u32>) -> impl Into<impl Debug> { x }
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| ^^^^^^^^^^^^^^^^^^^^^ the trait `From<impl Into<u32>>` is not implemented for `impl Debug`, which is required by `impl Into<u32>: Into<impl Debug>`
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= help: the trait `Into<U>` is implemented for `T`
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= note: required for `impl Into<u32>` to implement `Into<impl Debug>`
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error: aborting due to 7 previous errors
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Some errors have detailed explanations: E0277, E0562, E0666.
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For more information about an error, try `rustc --explain E0277`.
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