/usr/lib/debug/libpanel.so.5 is in libncurses5-dbg 6.0+20161126-1+deb9u2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/debug/libpanel.so.5.9
/usr/lib/debug/libpanel.so.5.9