CVE-2021-28878

In the standard library in Rust before 1.52.0, the Zip implementation calls
__iterator_get_unchecked() more than once for the same index (under certain
conditions) when next_back() and next() are used together. This bug could
lead to a memory safety violation due to an unmet safety requirement for
the TrustedRandomAccess trait.

Bugs

• <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=986803&gt;