env NVIM_LISTEN_ADDRESS= page Cargo.lock opens the file views it for a split second after which only an empty buffer is visible, page outputs /tmp/neovim-page/DO-NOT-REDIRECT-OUTSIDE-OF-NVIM-TERM(--help[-W]) on the command line.
env NVIM_LISTEN_ADDRESS= page -W Cargo.lock gets the same result but without any output on the commandline.
As reported by @sandersantema in #12: