debmirror deletes downloaded installer files

Not sure if this is the right list for this issue:

I run debmirror on current Jessie like shown below. It downloads the various
installer files, but at the end it removes them all again. Bug or feature?


debmirror --progress --verbose --host=ftp2.de.debian.org --root=/debian
--method=rsync --dist=jessie,jessie-updates,jessie-backports
--section=main,contrib,non-free,main/debian-installer --arch=i386,amd64
--di-dist=jessie,jessie-updates --di-arch=arches --nosource --i18n
--getcontents --slow-cpu --no-check-gpg $DIR
...
dists/jessie/main/installer-i386/current/images/MD5SUMS
...
deleting dists/jessie/main/installer-i386/20150422+deb8u2/images/MD5SUMS
...

Olaf