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error[E0277]: a value of type `Foo` cannot be built from an iterator over elements of type `_`
--> $DIR/recursion4.rs:10:28
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LL | x = std::iter::empty().collect();
| ^^^^^^^ value of type `Foo` cannot be built from `std::iter::Iterator<Item=_>`
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= help: the trait `FromIterator<_>` is not implemented for `Foo`
note: required by a bound in `collect`
--> $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL
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LL | fn collect<B: FromIterator<Self::Item>>(self) -> B
| ^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `collect`
error[E0277]: a value of type `impl Debug` cannot be built from an iterator over elements of type `_`
--> $DIR/recursion4.rs:19:28
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LL | x = std::iter::empty().collect();
| ^^^^^^^ value of type `impl Debug` cannot be built from `std::iter::Iterator<Item=_>`
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= help: the trait `FromIterator<_>` is not implemented for `impl Debug`
note: required by a bound in `collect`
--> $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL
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LL | fn collect<B: FromIterator<Self::Item>>(self) -> B
| ^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `collect`
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0277`.
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