diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/libcollections/vec.rs | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/libcollections/vec.rs b/src/libcollections/vec.rs index 6deb87ae772..fcebc22bb45 100644 --- a/src/libcollections/vec.rs +++ b/src/libcollections/vec.rs @@ -275,7 +275,9 @@ use Bound::{Excluded, Included, Unbounded}; /// removed data to be erased for security purposes. Even if you drop a `Vec`, its /// buffer may simply be reused by another `Vec`. Even if you zero a `Vec`'s memory /// first, that may not actually happen because the optimizer does not consider -/// this a side-effect that must be preserved. +/// this a side-effect that must be preserved. There is one case which we will +/// not break, however: using `unsafe` code to write to the excess capacity, +/// and then increasing the length to match, is always valid. /// /// `Vec` does not currently guarantee the order in which elements are dropped /// (the order has changed in the past, and may change again). |