The main specific is that it’s one of the most common errors. People don’t check comparison functions, but those functions have errors. You can read more here:

The main specific is that it’s one of the most common errors. People don’t check comparison functions, but those functions have errors. You can read more here: https://pvs-studio.com/en/blog/posts/cpp/0509/ https://pvs-studio.com/en/blog/posts/cpp/0509/