/usr/lib/ghc-doc/hoogle/array.txt is in ghc-doc 8.0.1-17.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/ghc-doc/html/libraries/array-0.5.1.1/array.txt
/usr/lib/ghc-doc/hoogle/../../../share/doc/ghc-doc/html/libraries/array-0.5.1.1/array.txt