> Probably because people with experience know how to handle these things up front so that they don't occur. bla bla bla. especially if you are dealing with a

> Probably because people with experience know how to handle these things up front so that they don't occur. bla bla bla. especially if you are dealing with a large code base with shifting requirements, where the code has been written over a long time by a lot of people; in a real world system you just can't make these assumptions regarding 'skill' at all. Even skilled people will have to deal with issues like invalidated iterators / containers that have been modified in non obvious ways / lots of other goodies as well. there are a lot of projects/products like this, my guess is that this is the case with the majority of projects.