It's time to halt starting any new projects in C/C++(twitter.com)

    #include <iostream>
    #include <string>
    #include <string_view>

    int main() {
      std::string s = "Hellooooooooooooooo ";
      std::string_view sv = s + "World\n";
      std::cout << sv;  // oops, use after free
      return 0;
    }

    unsafe {
        let event = CreateEventW(None, true, false, None)?;
        SetEvent(event).ok()?;
        WaitForSingleObject(event, 0);
        CloseHandle(event).ok()?;

        MessageBoxA(None, s!("Ansi"), s!("Caption"), MB_OK);
        MessageBoxW(None, w!("Wide"), w!("Caption"), MB_OK);
    }