Operating system: Windows 10
Graphics card: GTX 1080 Laptop Edition
Broken: 2.79, f4dc9f9d68b, master, 2018-03-22, as found on the splash screen
Short description of error
Whenever I attempt to use extrude (hotkey or sidebar), it acts as if I am using the move tool (G). In various attempts, G, also acts like E. Overall, I can't get it to extrude properly. This is while attempting to extrude an open circle mesh after creating it. Usually, the first time you attempt it it works fine, then after that, it stops working in that project file. You have to open a new project in order for it to work again as expected. Here is another user who apparently is having a similar problem in 2.8, though not entirely the same. https://blender.stackexchange.com/questions/139969/extrude-acting-like-move-blender-2-8?rq=1
His suggested workaround isn't working for me.
Exact steps for others to reproduce the error
Open the attached .blend file, Create a circle mesh and attempt to extrude.