/usr/lib/debug/libmenuw.so.5 is in libncursesw5-dbg 5.9+20140913-1+deb8u3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/debug/libmenuw.so.5.9
/usr/lib/debug/libmenuw.so.5.9