mirror of
https://github.com/rust-lang/rust.git
synced 2026-05-17 05:25:37 +03:00
95be21df47
There was an overflow bug in .size_hint() for signed iterators, which produced an hilariously incorrect size or an overflow panic. Incorrect size is a serious bug since the iterators are marked ExactSizeIterator. (And leads to abort() on (-1i8..127).collect() when the collection tries to preallocate too much). All signed range iterators were affected. > (-1i8..127).size_hint() (18446744073709551488, Some(18446744073709551488)) Bug found using quickcheck. Fixes #24851