Arguments to path.resolve must be strings

[FrankFang]

frank$ doxmate -i ./doxmate/

path.js:313
throw new TypeError('Arguments to path.resolve must be strings');
^
TypeError: Arguments to path.resolve must be strings
at Object.exports.resolve (path.js:313:15)
at Object. (/usr/local/lib/node_modules/doxmate/bin/doxmate:38:25)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Function.Module.runMain (module.js:497:10)
at startup (node.js:119:16)
at node.js:901:3