/usr/lib/ghc-doc/hoogle/libghc-qrencode-doc.txt is in libghc-qrencode-doc 1.0.4-8build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-qrencode-doc/html/haskell-qrencode.txt