IteratorRandom::sample: allow large "amount" #1695
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stepancheg
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Summary
When requested amount is large but, but iterator is small, avoid allocating too large vec.
Motivation
If there's wrapper of such API (e.g. remote API), and it has parameter "sample size", because it is external API, user may pass very large value there, and if a user does that, it is better not to crash.
Details
This change is no-op where iterator lower bound is equal to iterator size.
CHANGELOG.mdentry