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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.
42 lines
1.8 KiB
Plaintext
42 lines
1.8 KiB
Plaintext
error[E0277]: the size for values of type `[u8]` cannot be known at compilation time
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--> $DIR/unsized-exprs.rs:22:26
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LL | udrop::<(i32, [u8])>((42, *foo()));
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| ^^^^^^^^^^^^ doesn't have a size known at compile-time
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= help: within `({integer}, [u8])`, the trait `Sized` is not implemented for `[u8]`, which is required by `({integer}, [u8]): Sized`
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= note: required because it appears within the type `({integer}, [u8])`
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= note: tuples must have a statically known size to be initialized
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error[E0277]: the size for values of type `[u8]` cannot be known at compilation time
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--> $DIR/unsized-exprs.rs:24:22
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LL | udrop::<A<[u8]>>(A { 0: *foo() });
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| ^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
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= help: within `A<[u8]>`, the trait `Sized` is not implemented for `[u8]`, which is required by `A<[u8]>: Sized`
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note: required because it appears within the type `A<[u8]>`
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--> $DIR/unsized-exprs.rs:3:8
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LL | struct A<X: ?Sized>(X);
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| ^
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= note: structs must have a statically known size to be initialized
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error[E0277]: the size for values of type `[u8]` cannot be known at compilation time
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--> $DIR/unsized-exprs.rs:26:22
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LL | udrop::<A<[u8]>>(A(*foo()));
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| ^^^^^^^^^ doesn't have a size known at compile-time
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= help: within `A<[u8]>`, the trait `Sized` is not implemented for `[u8]`, which is required by `A<[u8]>: Sized`
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note: required because it appears within the type `A<[u8]>`
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--> $DIR/unsized-exprs.rs:3:8
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LL | struct A<X: ?Sized>(X);
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| ^
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= note: the return type of a function must have a statically known size
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error: aborting due to 3 previous errors
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For more information about this error, try `rustc --explain E0277`.
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