# File lib/sass/scss/parser.rb, line 1153
      def catch_error(&block)
        old_throw_error, @throw_error = @throw_error, true
        pos = @scanner.pos
        line = @line
        offset = @offset
        expected = @expected

        logger = Sass::Logger::Delayed.install!
        if catch(:_sass_parser_error) {yield; false}
          @scanner.pos = pos
          @line = line
          @offset = offset
          @expected = expected
          {:pos => pos, :line => line, :expected => @expected, :block => block}
        else
          logger.flush
          nil
        end
      ensure
        logger.uninstall! if logger
        @throw_error = old_throw_error
      end