OS X bug crashes every time you type File:/// (with an uppercase F) inside most standard text input controls. The bug affects almost every app that uses OS X’s standard text-input mechanisms. It’s a relatively minor issue that occurs only rarely in real-life use, and can be easily addressed by a few mouse clicks in the right System Preferences pane. The bad news is that this bug is very pervasive: It affects just about any app that makes use of data validators, from Finder to Safari.”]
Source: https://www.csoonline.com/article/2132888/url-detection-flaw-causes-os-x-apps-to-crash.html