Without seeing it, of course it's hard to write examples, but typically for this type of thing it turns out that "fucking with it" enough to be unsafe is easy t

Without seeing it, of course it's hard to write examples, but typically for this type of thing it turns out that "fucking with it" enough to be unsafe is easy to do by mistake and so you end up basically saying resorting to classic C++ "Nobody will make mistakes" safety which we know doesn't work. In some cases you can even "fuck with it" less than std::vector and cause memory unsafety because std::vector was implemented by people who've been fucked with before, and this "safe" collection maybe was not. Pushing items from the collection itself into the collection again when it's full is often one way to cause this - the std::vector promises this works correctly.