Found the following significant warnings:
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::warn_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::error_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::debug_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::slash_star’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::star_slash’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::else_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::ellipsis’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::hash_lbrace’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::rbrace’ will never be NULL [-Waddress]
  src/lexer.hpp:115:15: warning: the address of ‘Sass::Constants::of_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::url_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::selector_combinator_child’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::selector_combinator_general’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::selector_combinator_adjacent’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::slash_slash’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::calc_fn_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::supports_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::tilde_equal’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::pipe_equal’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::caret_equal’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::dollar_equal’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::star_equal’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::eq’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::neq’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::gt’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::gte’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::lt’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::lte’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::url_fn_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::progid_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::mixin_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::include_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::function_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::return_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::for_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::each_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::while_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::if_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::extend_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::import_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::media_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::charset_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::content_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::at_root_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::with_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::without_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::if_after_else_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::from_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::to_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::through_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::in_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::null_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::important_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::optional_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::default_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::global_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::pseudo_not_fn_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::even_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::odd_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::true_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::false_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:115:15: warning: the address of ‘Sass::Constants::only_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:115:15: warning: the address of ‘Sass::Constants::and_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:115:15: warning: the address of ‘Sass::Constants::or_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:115:15: warning: the address of ‘Sass::Constants::not_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:115:15: warning: the address of ‘Sass::Constants::using_kwd’ will never be NULL [-Waddress]
  src/lexer.hpp:89:15: warning: the address of ‘Sass::Constants::expression_kwd’ will never be NULL [-Waddress]
See ‘/home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/sass.Rcheck/00install.out’ for details.