Mistakes are an inevitable part of coding, and debugging is where the real problem-solving begins. This will inevitably lead to bugs. When you notice a bug you will, of course, spend some time figuring out what went wrong. There are two ways to tackle these bugs: detection and prevention.
Debugging
The science and art of understanding and fixing bugs.
(Not) Fixing the Final Bug
This is the story of the end of a project. We were about to release the last DLC before we moved on to the next game. Everything was ready to go, except for one, single, game breaking bug that would cause us to fail compliance testing.