Which script does this? Can you verify that it still does (from the version in libre-testing), many have been cleaned up.

All programs except for `toru` and `pkgbuild-check-nonfree` (now) use informative names for temp files.

Until recently, `aur` didn't clean up all of it's temp files.

All scripts except for `toru`, `fullpkg`, and `treepkg` have been reviewed.

I just found a bug in chcleanup (while fixing https://labs.parabola.nu/issues/389) that could cause it to leak temporary files. I've fixed it now.

I think this has been "fixed". If anyone notices it again, open a new bug. Otherwise, this bug will stay open forever "because there might be another case."