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warning: struct is never constructed: `Foo`
--> $DIR/issue-42479.rs:15:1
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LL | struct Foo {
| ^^^^^^^^^^
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= note: #[warn(dead_code)] on by default
warning: method is never used: `inside`
--> $DIR/issue-42479.rs:20:5
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LL | fn inside(&self) -> impl Iterator<Item = &i32> {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
