GHSA-XPHW-CQX3-667J thin-vec: Use-After-Free and Double Free in IntoIter::drop When Element Drop Panics

Summary A Double Free / Use-After-Free UAF vulnerability has been identified in the IntoIter::drop and ThinVec::clear implementations of the thinvec crate. Both vulnerabilities share the same root cause and can trigger memory corruption using only safe Rust code — no unsafe blocks required...