They're going to have to play that game anyway since the compiler/interpret won't spell out the exact issue every time. But they'll get through it anyway becaus

They're going to have to play that game anyway since the compiler/interpret won't spell out the exact issue every time. But they'll get through it anyway because their goal is something else rather than that game. A lot of learning comes from getting past stepping stones, but targeting a stepping stone as an explicit thing to learn and drill on is a poor plan.