HEISENBUG HEISENBUG

It's Friday night and you think you’re getting out on time, for once, and then it happens: You find a bug. Not a simple bug that you can fix in a few keystrokes, but a hulking, release blocking, HEISENBUG.

It looks like there must have been an oversight when the last code review happened, and in order for your product to ship in the next two weeks, the QA team needs the fixed build by this coming Monday. Can you guess what your Friday night has just turned into? You’re now stuck in front of your computer, fixing this major problem.

Let’s take a step back. How did you end up this position? Why aren’t GitHub pull requests enough? Could you have found this bug in a real code review?