Rollup merge of #138329 - scottmcm:assert-hint, r=Mark-Simulacrum

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`).

0 files changed, 0 insertions, 0 deletions