15 lines
317 B
Rust
15 lines
317 B
Rust
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// run-pass
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#![allow(unused_must_use)]
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fn bug<T>() -> impl Iterator<Item = [(); { |x: u32| { x }; 4 }]> {
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std::iter::empty()
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}
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fn ok<T>() -> Box<dyn Iterator<Item = [(); { |x: u32| { x }; 4 }]>> {
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Box::new(std::iter::empty())
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}
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fn main() {
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for _item in ok::<u32>() {}
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for _item in bug::<u32>() {}
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}
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