12 lines
233 B
Rust
12 lines
233 B
Rust
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#![deny(unused_must_use)]
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fn it() -> impl ExactSizeIterator<Item = ()> {
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let x: Box<dyn ExactSizeIterator<Item = ()>> = todo!();
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x
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}
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fn main() {
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it();
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//~^ ERROR unused implementer of `Iterator` that must be used
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}
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