They accomplish this through strong typing which ensures that addresses don't get mixed up with values. Often, stage-three tools are so integrated with the development process that we don't really notice them. That some of these tips will find their way into future language design, I have no doubt. These programs and script share a state file that became corrupted as the system was used. Although the programs run as concurrent processes, I soon discovered concurrency didn't have anything to do with my problem.
Bugs often arise because of a confusion between contexts.
The first bug, for example, arose because a parameter had one form in the context of the function that used it and another in the context of the client that invoked it. This bug arose because I confused file access in a random access context with file access in a sequential context. My needs were sequential, but I used random access methods. I was thinking sequential and so missed noticing one of the effects of random access. I know now what my mistake was even though, at that time, I didn't apply the mental effort needed to find it.