Add test for underflow in specialized Zip's size_hint
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@ -245,3 +245,23 @@ fn test_double_ended_zip() {
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assert_eq!(it.next_back(), Some((3, 3)));
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assert_eq!(it.next(), None);
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}
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#[test]
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fn test_issue_82282() {
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fn overflowed_zip(arr: &[i32]) -> impl Iterator<Item = (i32, &())> {
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static UNIT_EMPTY_ARR: [(); 0] = [];
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let mapped = arr.into_iter().map(|i| *i);
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let mut zipped = mapped.zip(UNIT_EMPTY_ARR.iter());
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zipped.next();
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zipped
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}
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let arr = [1, 2, 3];
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let zip = overflowed_zip(&arr).zip(overflowed_zip(&arr));
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assert_eq!(zip.size_hint(), (0, Some(0)));
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for _ in zip {
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panic!();
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}
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}
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