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error: use of `extend` instead of `append` for adding the full range of a second vector
--> tests/ui/extend_with_drain.rs:8:5
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LL | vec2.extend(vec1.drain(..));
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `vec2.append(&mut vec1)`
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= note: `-D clippy::extend-with-drain` implied by `-D warnings`
= help: to override `-D warnings` add `#[allow(clippy::extend_with_drain)]`
error: use of `extend` instead of `append` for adding the full range of a second vector
--> tests/ui/extend_with_drain.rs:14:5
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LL | vec4.extend(vec3.drain(..));
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `vec4.append(&mut vec3)`
error: use of `extend` instead of `append` for adding the full range of a second vector
--> tests/ui/extend_with_drain.rs:19:5
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LL | vec11.extend(return_vector().drain(..));
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `vec11.append(&mut return_vector())`
error: use of `extend` instead of `append` for adding the full range of a second vector
--> tests/ui/extend_with_drain.rs:51:5
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LL | y.extend(ref_x.drain(..));
| ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `y.append(ref_x)`
error: aborting due to 4 previous errors
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