This isn't complicated at all. You copied the code, which isn't an issue until you then go on to do something which infringes the license (e.g. publish under a

This isn't complicated at all. You copied the code, which isn't an issue until you then go on to do something which infringes the license (e.g. publish under a different license, publish binaries without publishing source, publish without attribution, whatever it is that the license requires).