/usr/share/slice/IcePatch2 is in zeroc-ice-slice 3.6.3-5.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/slice/../Ice-3.6.3/slice/IcePatch2
/usr/share/slice/../Ice-3.6.3/slice/IcePatch2