This is an entirely different mechanism, but was bitten not long ago by a surprising feature of the C++ language. It was as surprising to me as I imagine savin

This is an entirely different mechanism, but was bitten not long ago by a surprising feature of the C++ language. It was as surprising to me as I imagine saving a file to aux.c would be. I was working on a C++ program, editing, compiling, debugging as one does. After a while, my efforts to compile were stymied due to a flood of weird compiler errors that didn't make sense. After rewinding recent changes to a point where I knew it used to compile, it still refused to compile. Finally I figured it out. During debugging, I created two copies of log file, one called "old" and one called "new". Somewhere in an include file (which probably included other files, etc), there was a statement "#include <new>". Rather that picking up the library source code, it tried to interpolate the contents of the local file "new" during the compile phase.