abseil-cpp

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Derek Mauro 69947927f9 Adds bounds-checking to the second range of absl container algorithms (#812 )

The APIs for the two-range `absl::c_mismatch`, `absl::c_swap_ranges`,
and `absl::c_transform` are misleading as they do not check the bounds
of the second range against the first one.

This commit cleans up ensures that buggy calls are not exploitable;
non-buggy calls are unaffected.

This is consistent with both C++14's two-range `std::` equivalents and
C++20's `std::ranges::` equivalents.
http://wg21.link/mismatch
http://wg21.link/alg.swap
http://wg21.link/alg.transform

2020-10-09 14:48:25 -04:00