/usr/share/doc/libblasr/changelog.Debian.gz is in libblasr 0~20161219-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libblasr/../libpbdata/changelog.Debian.gz
/usr/share/doc/libblasr/../libpbdata/changelog.Debian.gz