[root.log]
...
DEBUG backend.py:621:  ========== /var/lib/mock/dist-foo-build-62-14/root/builddir: not exist. uid=0,euid=0,494=kojibuilder,495=torrent
DEBUG util.py:284:  Executing command: ['/usr/sbin/userdel', '-r', 'mockbuild']
DEBUG util.py:323:  Child returncode was: 6
DEBUG backend.py:621:  ========== /var/lib/mock/dist-foo-build-62-14/root/builddir: not exist. uid=0,euid=0,494=kojibuilder,495=torrent
DEBUG util.py:284:  Executing command: ['/usr/sbin/groupdel', 'mockbuild']
DEBUG util.py:323:  Child returncode was: 6
DEBUG backend.py:621:  ========== /var/lib/mock/dist-foo-build-62-14/root/builddir: not exist. uid=0,euid=0,494=kojibuilder,495=torrent
DEBUG util.py:284:  Executing command: ['/usr/sbin/groupadd', '-g', '491', 'mockbuild']
DEBUG util.py:323:  Child returncode was: 0
DEBUG backend.py:621:  ========== /var/lib/mock/dist-foo-build-62-14/root/builddir: not exist. uid=0,euid=0,494=kojibuilder,495=torrent
DEBUG util.py:284:  Executing command: /usr/sbin/useradd -m -u 494 -g 491 -d /builddir -n mockbuild
DEBUG util.py:323:  Child returncode was: 0
DEBUG backend.py:629:  ========== /var/lib/mock/dist-foo-build-62-14/root/builddir: kojibuilder:mock uid=0,euid=0,494=kojibuilder,495=torrent
...
DEBUG util.py:284:  Executing command: ['/usr/sbin/userdel', '-r', 'mockbuild']
DEBUG util.py:260:  userdel:delete /builddir error
DEBUG util.py:323:  Child returncode was: 12
DEBUG backend.py:621:  ========== /var/lib/mock/dist-foo-build-62-14/root/builddir: not exist. uid=0,euid=0,494=kojibuilder,495=torrent
DEBUG util.py:284:  Executing command: ['/usr/sbin/groupdel', 'mockbuild']
DEBUG util.py:260:  groupdel:mockbuild group not exist
DEBUG util.py:323:  Child returncode was: 6
DEBUG backend.py:621:  ========== /var/lib/mock/dist-foo-build-62-14/root/builddir: not exist. uid=0,euid=0,494=kojibuilder,495=torrent
DEBUG util.py:284:  Executing command: ['/usr/sbin/groupadd', '-g', '491', 'mockbuild']
DEBUG util.py:323:  Child returncode was: 0
DEBUG backend.py:621:  ========== /var/lib/mock/dist-foo-build-62-14/root/builddir: not exist. uid=0,euid=0,494=kojibuilder,495=torrent
DEBUG util.py:284:  Executing command: /usr/sbin/useradd -m -u 494 -g 491 -d /builddir -n mockbuild
DEBUG util.py:323:  Child returncode was: 0
DEBUG backend.py:629:  ========== /var/lib/mock/dist-foo-build-62-14/root/builddir: torrent:mock uid=0,euid=0,494=kojibuilder,495=torrent
...