pintsized/ledge — pull request #89 by hamishforbes (2014-10-27 15:43:08+00:00)
Title: Bug: ngx.var.args can be nil or an empty string

No query string in the request sets ngx.var.args to nil, but if you use ngx.req.set_uri_args() with an empty table ngx.var.args becomes an empty string.
Not sure if this is intended but means you can get a key mismatch in some situations..