RUSTSEC-2026-0252 Panic-safety unsoundness in `SplitVec::extend_from_slice` (uninitialized read)
PublishedSplitVec::extend_from_slice increments the logical length self.len before cloning the incoming elements into the reserved slots. If an element's Clone panics mid-fill, unwinding leaves self.len counting slots that were never initialized. A later safe read (get, indexing, iter) th...