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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.
36 lines
1.4 KiB
Plaintext
36 lines
1.4 KiB
Plaintext
error[E0277]: the type `[{integer}]` cannot be indexed by `u8`
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--> $DIR/indexing-requires-a-uint.rs:6:9
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LL | [0][0u8];
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| ^^^ slice indices are of type `usize` or ranges of `usize`
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= help: the trait `SliceIndex<[{integer}]>` is not implemented for `u8`, which is required by `[{integer}; 1]: Index<_>`
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= help: the trait `SliceIndex<[{integer}]>` is implemented for `usize`
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= help: for that trait implementation, expected `usize`, found `u8`
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= note: required for `[{integer}]` to implement `Index<u8>`
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= note: 1 redundant requirement hidden
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= note: required for `[{integer}; 1]` to implement `Index<u8>`
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error[E0308]: mismatched types
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--> $DIR/indexing-requires-a-uint.rs:12:18
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LL | bar::<isize>(i); // i should not be re-coerced back to an isize
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| ------------ ^ expected `isize`, found `usize`
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| arguments to this function are incorrect
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note: function defined here
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--> $DIR/indexing-requires-a-uint.rs:5:8
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LL | fn bar<T>(_: T) {}
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| ^^^ ----
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help: you can convert a `usize` to an `isize` and panic if the converted value doesn't fit
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LL | bar::<isize>(i.try_into().unwrap()); // i should not be re-coerced back to an isize
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| ++++++++++++++++++++
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error: aborting due to 2 previous errors
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Some errors have detailed explanations: E0277, E0308.
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For more information about an error, try `rustc --explain E0277`.
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