I'm a student but I've been working backend and frontend for about a year and a half now. I know just enough to be frustrated whenever a teacher says the words "group" and "project". Anyway, there was an assignment due yesterday for my group, and it was working more or less perfectly, then at the last minute, this guy gets on and tries to "fix" an issue that the teacher said specifically we didn't have to solve.

HE. BROKE. EVERYTHING. And then he pushed straight to master. Ironically, the program still ran, it appeared to be encrypting and decrypting correctly, but he basically removed one of the algorithms we were supposed to implement. I think the professor will give us a better grade than we deserve but still...