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error: use of `flat_map` with an identity function
--> $DIR/flat_map_identity.rs:8:22
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LL | let _ = iterator.flat_map(|x| x);
| ^^^^^^^^^^^^^^^ help: try: `flatten()`
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= note: `-D clippy::flat-map-identity` implied by `-D warnings`
= help: to override `-D warnings` add `#[allow(clippy::flat_map_identity)]`
error: use of `flat_map` with an identity function
--> $DIR/flat_map_identity.rs:11:22
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LL | let _ = iterator.flat_map(convert::identity);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `flatten()`
error: use of `flat_map` with an identity function
--> $DIR/flat_map_identity.rs:14:22
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LL | let _ = iterator.flat_map(|x| return x);
| ^^^^^^^^^^^^^^^^^^^^^^ help: try: `flatten()`
error: aborting due to 3 previous errors
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