https://tildegit.org/akkartik/lines.love/issues/1
PX3736DXTMOKZHWGZKY446VJQ4URULLXZTG34A3JYZRDWWE5ETKAC
AD34IX2ZSGYGU3LGY2IZOZNKD4HRQOYJVG5UWMWLXJZJSM62FFOAC
VHQCNMARPMNBSIUFLJG7HVK4QGDNPCGNVFLHS3I4IGNVSV5MRLYQC
if outfile == nil then error('failed to write to "'..filename..'"') end
if outfile == nil then
error('failed to write to "'..filename..'"')
end