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许杰友 Jieyou Xu (Joe)
01bc95417c
debug-assert that the size_hint is well-formed in `collect` Closes #137919 In the hopes of helping to catch any future accidentally-incorrect rustc or stdlib iterators (like the ones #137908 accidentally found), this has `Iterator::collect` call `size_hint` and check its `low` doesn't exceed its `Some(high)`. There's of course a bazillion more places this *could* be checked, but the hope is that this one is a good tradeoff of being likely to catch lots of things while having minimal maintenance cost (especially compared to putting it in *every* container's `from_iter`).