"My management thinks he is A level player" ... and yet he's "asking me to take a look at his compilation errors" . A-level players don't need help fixing compilation errors. In fact, A-level players rarely have compilation errors. Routinely writing code that doesn't compile (except for obvious typos) is the sign of someone who doesn't know the language they're using very well.
I routinely write code that doesn't compile. Which is not to say that it's the most frequent case, but that I do it deliberately as a matter of course. Specifically, when I am making certain kinds of changes where I know that the compiler will catch everything I need to change as a type error, and thus surface those to me more quickly than any other means of finding all those places. Of course, I don't wind up asking other people to tell me what the error messages mean.