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@ -275,7 +275,9 @@ use Bound::{Excluded, Included, Unbounded};
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/// removed data to be erased for security purposes. Even if you drop a `Vec`, its
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/// buffer may simply be reused by another `Vec`. Even if you zero a `Vec`'s memory
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/// first, that may not actually happen because the optimizer does not consider
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/// this a side-effect that must be preserved.
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/// this a side-effect that must be preserved. There is one case which we will
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/// not break, however: using `unsafe` code to write to the excess capacity,
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/// and then increasing the length to match, is always valid.
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///
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/// `Vec` does not currently guarantee the order in which elements are dropped
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/// (the order has changed in the past, and may change again).
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