failsafe_csv.rb

def parse filename, content
  offset = 0
  begin
    FasterCSV.parse(content) do |row|
      # do stuff
      offset += row.to_s.size
    end
  rescue FasterCSV::MalformedCSVError => e
    @file_offset ||= 0
    @file_offset += offset
    # cut offset chars from the beginning of content
    malformed_row, content = content.split("\n", 2)
    e.set_backtrace [ "#{filename}:#{@file_offset} #{malformed_row}" ]
    @file_offset += malformed_row.size + 1
    parse filename, content if content.present?
  end
end