/*
Error: Undefined variable: "$main_bold_color".
        on line 6 of header.scss

1: /* BANNER *\/
2: 
3: .strong-banner {
4:   padding-top       : 20px;
5:   padding-bottom    : 10px ;
6:   background-color  : $main_bold_color;
7:   color: $second_bold_color;
8: }
9: 
10: 
11: .navbar-inverse {

Backtrace:
header.scss:6
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/script/tree/variable.rb:49:in `_perform'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/script/tree/node.rb:50:in `perform'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/tree/visitors/perform.rb:402:in `visit_prop'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/tree/visitors/base.rb:36:in `visit'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/tree/visitors/perform.rb:162:in `block in visit'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/stack.rb:79:in `block in with_base'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/stack.rb:135:in `with_frame'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/stack.rb:79:in `with_base'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/tree/visitors/perform.rb:162:in `visit'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/tree/visitors/perform.rb:444:in `block (2 levels) in visit_rule'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/tree/visitors/perform.rb:444:in `map'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/tree/visitors/perform.rb:444:in `block in visit_rule'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/tree/visitors/perform.rb:183:in `with_environment'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/tree/visitors/perform.rb:442:in `visit_rule'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/tree/visitors/base.rb:36:in `visit'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/tree/visitors/perform.rb:162:in `block in visit'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/stack.rb:79:in `block in with_base'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/stack.rb:135:in `with_frame'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/stack.rb:79:in `with_base'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/tree/visitors/perform.rb:162:in `visit'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/tree/visitors/base.rb:52:in `block in visit_children'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/tree/visitors/base.rb:52:in `map'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/tree/visitors/base.rb:52:in `visit_children'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/tree/visitors/perform.rb:171:in `block in visit_children'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/tree/visitors/perform.rb:183:in `with_environment'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/tree/visitors/perform.rb:170:in `visit_children'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/tree/visitors/base.rb:36:in `block in visit'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/tree/visitors/perform.rb:190:in `visit_root'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/tree/visitors/base.rb:36:in `visit'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/tree/visitors/perform.rb:161:in `visit'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/tree/visitors/perform.rb:10:in `visit'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/tree/root_node.rb:36:in `css_tree'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/tree/root_node.rb:29:in `render_with_sourcemap'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/engine.rb:389:in `_render_with_sourcemap'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/engine.rb:307:in `render_with_sourcemap'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/plugin/compiler.rb:462:in `update_stylesheet'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/plugin/compiler.rb:215:in `block in update_stylesheets'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/plugin/compiler.rb:209:in `each'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/plugin/compiler.rb:209:in `update_stylesheets'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/plugin/compiler.rb:294:in `watch'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/plugin.rb:109:in `method_missing'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/exec/sass_scss.rb:360:in `watch_or_update'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/exec/sass_scss.rb:51:in `process_result'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/exec/base.rb:52:in `parse'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/lib/sass/exec/base.rb:19:in `parse!'
/usr/lib/ruby/gems/2.5.0/gems/sass-3.5.5/bin/sass:13:in `<top (required)>'
/usr/bin/sass:23:in `load'
/usr/bin/sass:23:in `<main>'
*/
body:before {
  white-space: pre;
  font-family: monospace;
  content: "Error: Undefined variable: \"$main_bold_color\".\A         on line 6 of header.scss\A \A 1: /* BANNER */\A 2: \A 3: .strong-banner {\A 4:   padding-top       : 20px;\A 5:   padding-bottom    : 10px ;\A 6:   background-color  : $main_bold_color;\A 7:   color: $second_bold_color;\A 8: }\A 9: \A 10: \A 11: .navbar-inverse {"; }