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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.
82 lines
3.3 KiB
Plaintext
82 lines
3.3 KiB
Plaintext
error[E0277]: the size for values of type `str` cannot be known at compilation time
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--> $DIR/str-mut-idx.rs:4:15
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LL | s[1..2] = bot();
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| ^^^^^ doesn't have a size known at compile-time
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= help: the trait `Sized` is not implemented for `str`
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note: required by a bound in `bot`
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--> $DIR/str-mut-idx.rs:1:8
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LL | fn bot<T>() -> T { loop {} }
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| ^ required by this bound in `bot`
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help: consider relaxing the implicit `Sized` restriction
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LL | fn bot<T: ?Sized>() -> T { loop {} }
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| ++++++++
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error[E0277]: the size for values of type `str` cannot be known at compilation time
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--> $DIR/str-mut-idx.rs:4:5
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LL | s[1..2] = bot();
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| ^^^^^^^ doesn't have a size known at compile-time
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= help: the trait `Sized` is not implemented for `str`
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= note: the left-hand-side of an assignment must have a statically known size
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error[E0277]: the type `str` cannot be indexed by `usize`
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--> $DIR/str-mut-idx.rs:7:7
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LL | s[1usize] = bot();
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| ^^^^^^ string indices are ranges of `usize`
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= help: the trait `SliceIndex<str>` is not implemented for `usize`, which is required by `str: Index<_>`
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= help: the trait `SliceIndex<[_]>` is implemented for `usize`
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= help: for that trait implementation, expected `[_]`, found `str`
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= note: required for `str` to implement `Index<usize>`
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error[E0277]: the type `str` cannot be indexed by `{integer}`
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--> $DIR/str-mut-idx.rs:9:15
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LL | s.get_mut(1);
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| ------- ^ string indices are ranges of `usize`
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| required by a bound introduced by this call
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= help: the trait `SliceIndex<str>` is not implemented for `{integer}`
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= note: you can use `.chars().nth()` or `.bytes().nth()`
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for more information, see chapter 8 in The Book: <https://doc.rust-lang.org/book/ch08-02-strings.html#indexing-into-strings>
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= help: the trait `SliceIndex<[_]>` is implemented for `usize`
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= help: for that trait implementation, expected `[_]`, found `str`
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note: required by a bound in `core::str::<impl str>::get_mut`
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--> $SRC_DIR/core/src/str/mod.rs:LL:COL
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error[E0277]: the type `str` cannot be indexed by `{integer}`
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--> $DIR/str-mut-idx.rs:11:25
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LL | s.get_unchecked_mut(1);
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| ----------------- ^ string indices are ranges of `usize`
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| required by a bound introduced by this call
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= help: the trait `SliceIndex<str>` is not implemented for `{integer}`
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= note: you can use `.chars().nth()` or `.bytes().nth()`
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for more information, see chapter 8 in The Book: <https://doc.rust-lang.org/book/ch08-02-strings.html#indexing-into-strings>
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= help: the trait `SliceIndex<[_]>` is implemented for `usize`
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= help: for that trait implementation, expected `[_]`, found `str`
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note: required by a bound in `core::str::<impl str>::get_unchecked_mut`
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--> $SRC_DIR/core/src/str/mod.rs:LL:COL
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error[E0277]: the type `str` cannot be indexed by `char`
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--> $DIR/str-mut-idx.rs:13:7
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LL | s['c'];
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| ^^^ string indices are ranges of `usize`
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= help: the trait `SliceIndex<str>` is not implemented for `char`, which is required by `str: Index<_>`
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= note: required for `str` to implement `Index<char>`
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error: aborting due to 6 previous errors
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For more information about this error, try `rustc --explain E0277`.
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