Wrote and tested the code, checked in to source control. Job done.
A few days later we deployed a new release that included dozens of bug fixes into UAT for testing. Soon after a tester showed me a screen where a lot of stuff wasn’t looking right, and things that had been working for a long time was not working at all.
Developer: “It works fine on my machine.”
- they are using Internet Explorer 11
- a compilation error was accusing the line with the ** operator