I'm the sort of person who likes using iterators and pointers (rather than indices) to remember where I am in a list. I tend to store them in structures, then go away, modify the list, and expect them to still be valid when I come back.
That's perfectly reasonable when I'm using std::list, but it all goes to hell when using something that periodically needs reallocation. When you try to put something into a std::vector and it doesn't have space, it reallocates the whole thing and copies the old data to the new location, invalidating all your pointers.
Every time I use something other than std::list to store stuff, I end up forgetting this. And it always takes me a whole day to figure out what I've done wrong.
Previous Topic
