# File lib/sass/tree/visitors/cssize.rb, line 141
  def visit_trace(node)
    visit_children_without_parent(node)
  rescue Sass::SyntaxError => e
    e.modify_backtrace(:mixin => node.name, :filename => node.filename, :line => node.line)
    e.add_backtrace(:filename => node.filename, :line => node.line)
    raise e
  end