A few days ago, one particularly ambitious victim student of mine asked for assistance in tracking down a bug.

A plea for order

by Philipp Lenk

From the article:

I know I promised to talk more about emulation, about chess and operating systems, but I have to get something off of my chest first. This is not going to be one of my would-be grand and elongated epics trying to cover far too much in far too many words. Instead, I shall focus on one very small, very self contained thing: the order of #include directives in C++ source code