092ecca5b9
```
error[E0277]: the trait bound `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}: Coroutine` is not satisfied
--> $DIR/gen_block_is_coro.rs:6:13
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LL | fn foo() -> impl Coroutine<Yield = u32, Return = ()> {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Coroutine` is not implemented for `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}`
LL | gen { yield 42 }
| ---------------- return type was inferred to be `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}` here
```
The secondary span label is new.
15 lines
652 B
Plaintext
15 lines
652 B
Plaintext
error[E0271]: expected `foo` to be a fn item that returns `i32`, but it returns `()`
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--> $DIR/issue-106991.rs:5:13
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LL | fn bar() -> impl Iterator<Item = i32> {
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| ^^^^^^^^^^^^^^^^^^^^^^^^^ expected `i32`, found `()`
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...
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LL | x.iter_mut().map(foo)
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| --------------------- return type was inferred to be `Map<std::slice::IterMut<'_, Vec<u8>>, for<'a> fn(&'a mut Vec<u8>) {foo}>` here
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= note: required for `Map<std::slice::IterMut<'_, Vec<u8>>, for<'a> fn(&'a mut Vec<u8>) {foo}>` to implement `Iterator`
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error: aborting due to 1 previous error
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For more information about this error, try `rustc --explain E0271`.
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