/usr/share/doc/mupen64plus-rsp-hle-dbg/changelog.Debian.gz is in mupen64plus-rsp-hle-dbg 2.0-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/mupen64plus-rsp-hle-dbg/../mupen64plus-rsp-hle/changelog.Debian.gz