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.
github.com/rust-lang/rust/issues/82291
github.com/rust-lang/rust/pull/82292
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security.gentoo.org/glsa/202210-09