1d860902f6
```
error[E0277]: the trait bound `u32: Trait` is not satisfied
--> $DIR/trait_objects_fail.rs:26:9
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LL | foo(&10_u32);
| ^^^^^^^ the trait `Trait` is not implemented for `u32`
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help: the trait `Trait<12>` is not implemented for `u32`
but trait `Trait<2>` is implemented for it
--> $DIR/trait_objects_fail.rs:7:1
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LL | impl Trait<2> for u32 {}
| ^^^^^^^^^^^^^^^^^^^^^
= note: required for the cast from `&u32` to `&dyn Trait`
```
Pointing at the `impl` definition that *could* apply given a different self type is particularly useful when it has a blanket self type, as it might not be obvious and is not trivially greppable:
```
error[E0277]: the trait bound `RawImpl<_>: Raw<_>` is not satisfied
--> $DIR/issue-62742.rs:4:5
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LL | WrongImpl::foo(0i32);
| ^^^^^^^^^ unsatisfied trait bound
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help: the trait `Raw<_>` is not implemented for `RawImpl<_>`
but trait `Raw<[_]>` is implemented for it
--> $DIR/issue-62742.rs:29:1
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LL | impl<T> Raw<[T]> for RawImpl<T> {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: required by a bound in `SafeImpl`
--> $DIR/issue-62742.rs:33:35
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LL | pub struct SafeImpl<T: ?Sized, A: Raw<T>>(PhantomData<(A, T)>);
| ^^^^^^ required by this bound in `SafeImpl`
```
39 lines
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39 lines
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Text
error: expected one of `,`, `:`, or `>`, found `=`
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--> $DIR/issue-34334.rs:2:29
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LL | let sr: Vec<(u32, _, _) = vec![];
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| - ^ expected one of `,`, `:`, or `>`
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| |
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| while parsing the type for `sr`
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help: you might have meant to end the type parameters here
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LL | let sr: Vec<(u32, _, _)> = vec![];
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| +
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error[E0277]: a value of type `Vec<(u32, _, _)>` cannot be built from an iterator over elements of type `()`
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--> $DIR/issue-34334.rs:5:87
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LL | let sr2: Vec<(u32, _, _)> = sr.iter().map(|(faction, th_sender, th_receiver)| {}).collect();
|
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| ^^^^^^^ value of type `Vec<(u32, _, _)>` cannot be built from `std::iter::Iterator<Item=()>`
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help: the trait `FromIterator<()>` is not implemented for `Vec<(u32, _, _)>`
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but trait `FromIterator<(u32, _, _)>` is implemented for it
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--> $SRC_DIR/alloc/src/vec/mod.rs:LL:COL
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= help: for that trait implementation, expected `(u32, _, _)`, found `()`
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note: the method call chain might not have had the expected associated types
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--> $DIR/issue-34334.rs:5:43
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LL | let sr: Vec<(u32, _, _) = vec![];
|
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| ------ this expression has type `Vec<(_, _, _)>`
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...
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LL | let sr2: Vec<(u32, _, _)> = sr.iter().map(|(faction, th_sender, th_receiver)| {}).collect();
|
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| ------ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `Iterator::Item` changed to `()` here
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| |
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| `Iterator::Item` is `&(_, _, _)` here
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note: required by a bound in `collect`
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--> $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL
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error: aborting due to 2 previous errors
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For more information about this error, try `rustc --explain E0277`.
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