/usr/lib/ghc-doc/hoogle/libghc-data-default-instances-containers-doc.txt is in libghc-data-default-instances-containers-doc 0.0.1-7build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-data-default-instances-containers-doc/html/data-default-instances-containers.txt