Using fs_scandir and fs_scandir_next as an iterator results in a memory leak if the iterator is not fully drained. Example:

local luv = require 'luv'

local function dir(d)
  return function(fs)
    return luv.fs_scandir_next(fs)
  end, luv.fs_scandir(d)
end

for name in dir('.') do
  print(name)
  break
end

This results in a memory leak. This happens because the uv_fs_req is only cleaned up when the iterator reaches a UV_EOF:

However, when the iteration loop breaks early this condition is never hit and uv_fs_req_cleanup is never called.

It does not seem possible to manually cleanup the fs handles either: fs:close() does not exist.