[linuxftw]

I don't think your actions were irresponsible. I would assume someone with domain knowledge of the area you changed did a proper code review, especially since you were an intern.

If there's not time to write proper tests for code, there's not time for manual testing either. Testing every line of a code change can burn a lot of your time up.

Additionally, if a seemingly strange way to do something is necessary for proper function, there should have been a comment in the code to explain why it was doing something in such a particular way.