My comment acknowledges the issue mentioned by the parent comment and extends it with extra information out of my own curiosity, and which others may find useful or valuable too. Or not. I don't care.
There surely could exist std::vector implementation with std::realloc implementation under the hood where the issue described wouldn't always be reproducible? I think that MSVC actually uses this technique AFAIR.
There surely could exist std::vector implementation with std::realloc implementation under the hood where the issue described wouldn't always be reproducible? I think that MSVC actually uses this technique AFAIR.