Not sure, but I would rather fix it by keeping the file “in-memory”, as it is likely to not be much of a problem (say 50-200mb file, and memory is 4GB+ on new laptops).
But it is a bit of a corner case, as the file is temporary (and thus is written at the right place) but it is also used to “communicate” internally, in that it is created and passed to another method. It would be possible to keep the file open, which would prevent a cleaner program from deleting it.