Bug fixes for StrV[Ref]
#1778
Open
Bug fixes for StrV[Ref]
#1778
+86
−4
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The left hand side of the condition `self.len + additional + 1 <= self. capacity` could overflow and wrap around if `additional` was set to a huge value, causing `reserve` to return without reserving a specified capacity.
The left hand side of the condition `self.len + other.len() + 1 <= self. capacity` could overflow and wrap around if `other` contained a large number of elements, causing it to proceed to the copying code without calling `reserve`.
We need to ensure that `self` is null-terminated even if `<S as AsRef< str>>::as_ref` panics.
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Fixes the following bugs:
StrV::reservecan return without actually reserving ifadditionalis too large (>= usize::MAX - self.len()) and overflow checking is disabledStrV::extend_from_slicecan incorrectly skipStrV::reservebefore writing elements if it is given a ZST slice containing a large number of elements (>= usize::MAX - self.len()) and overflow checking is disabledStrV::extend_from_sliceis not panic safe<StrVRef as PartialEq<[&str]>>::eqincorrectly evaluates tofalseif two slices have different numbers of elements but their prefixes match