/*
Error: Undefined variable: "$list-group-bg".
        on line 27 of sass/bootstrap/list-group.scss

22:   position: relative;
23:   display: block;
24:   padding: 10px 15px;
25:   // Place the border on the list items and negative margin up for better styling
26:   margin-bottom: -1px;
27:   background-color: $list-group-bg;
28:   border: 1px solid $list-group-border;
29: 
30:   // Round the first and last items
31:   &:first-child {
32:     @include border-top-radius($list-group-border-radius);

Backtrace:
sass/bootstrap/list-group.scss:27
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/script/tree/variable.rb:49:in `_perform'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/script/tree/node.rb:50:in `perform'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/tree/visitors/perform.rb:384:in `visit_prop'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/tree/visitors/base.rb:36:in `visit'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/tree/visitors/perform.rb:158:in `block in visit'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/stack.rb:79:in `block in with_base'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/stack.rb:115:in `with_frame'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/stack.rb:79:in `with_base'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/tree/visitors/perform.rb:158:in `visit'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/tree/visitors/perform.rb:420:in `block (2 levels) in visit_rule'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/tree/visitors/perform.rb:420:in `map'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/tree/visitors/perform.rb:420:in `block in visit_rule'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/tree/visitors/perform.rb:179:in `with_environment'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/tree/visitors/perform.rb:418:in `visit_rule'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/tree/visitors/base.rb:36:in `visit'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/tree/visitors/perform.rb:158:in `block in visit'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/stack.rb:79:in `block in with_base'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/stack.rb:115:in `with_frame'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/stack.rb:79:in `with_base'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/tree/visitors/perform.rb:158:in `visit'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/tree/visitors/base.rb:52:in `block in visit_children'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/tree/visitors/base.rb:52:in `map'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/tree/visitors/base.rb:52:in `visit_children'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/tree/visitors/perform.rb:167:in `block in visit_children'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/tree/visitors/perform.rb:179:in `with_environment'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/tree/visitors/perform.rb:166:in `visit_children'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/tree/visitors/base.rb:36:in `block in visit'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/tree/visitors/perform.rb:186:in `visit_root'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/tree/visitors/base.rb:36:in `visit'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/tree/visitors/perform.rb:157:in `visit'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/tree/visitors/perform.rb:8:in `visit'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/tree/root_node.rb:36:in `css_tree'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/tree/root_node.rb:29:in `render_with_sourcemap'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/engine.rb:368:in `_render_with_sourcemap'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/engine.rb:285:in `render_with_sourcemap'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/plugin/compiler.rb:489:in `update_stylesheet'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/plugin/compiler.rb:215:in `block in update_stylesheets'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/plugin/compiler.rb:209:in `each'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/plugin/compiler.rb:209:in `update_stylesheets'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/plugin/compiler.rb:293:in `watch'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/plugin.rb:108:in `method_missing'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/exec/sass_scss.rb:370:in `watch_or_update'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/exec/sass_scss.rb:50:in `process_result'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/exec/base.rb:52:in `parse'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/lib/sass/exec/base.rb:19:in `parse!'
/Library/Ruby/Gems/2.0.0/gems/sass-3.4.8/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: \"$list-group-bg\".\A         on line 27 of sass/bootstrap/list-group.scss\A \A 22:   position: relative;\A 23:   display: block;\A 24:   padding: 10px 15px;\A 25:   // Place the border on the list items and negative margin up for better styling\A 26:   margin-bottom: -1px;\A 27:   background-color: $list-group-bg;\A 28:   border: 1px solid $list-group-border;\A 29: \A 30:   // Round the first and last items\A 31:   &:first-child {\A 32:     @include border-top-radius($list-group-border-radius);"; }
