The vulnerability description explicitly identifies FixedCapacityDequeLike<T, A>::clone() as the problematic function. The root cause is insufficient panic safety - when user-provided T::clone() panics during the cloning process, the implementation doesn't properly track initialized elements. This results in the drop handler attempting to destruct uninitialized memory, violating memory safety. The advisory's technical details and CVE description consistently point to this specific function as the vulnerability source.