Handling empty rules (i.e., extra semicolons, but it's subtle).

document_parser.cpp

@@ -73,7 +73,7 @@ namespace Sass {
     lex< exactly<'{'> >();
     bool semicolon = false;
     Node block(line_number, Node::block);
-    while (!lex < exactly<'}'> >()) {
+    while (!lex< exactly<'}'> >()) {
       if (semicolon) {
         lex< exactly<';'> >(); // enforce terminal ';' here
         semicolon = false;
@@ -84,23 +84,20 @@ namespace Sass {
         block << Node(line_number, Node::comment, lexed);
         block.has_rules_or_comments = true;
         semicolon = true;
-        continue;
       }
       else if (lex< variable >()) {
         parse_var_def();
-        continue;
       }
       else if (look_for_rule(position)) {
         block << parse_rule();
         block.has_rules_or_comments = true;
         semicolon = true;
-        continue;
       }
-      else {
+      else if (!peek< exactly<';'> >()) {
         block << parse_ruleset();
         block.has_rulesets = true;
-        continue;
       }
+      else lex< exactly<';'> >();
     }
     return block;
     //   lex< identifier >();

test.scss

@@ -13,7 +13,7 @@ div {
       text-decoration: none; /* where will this comment go? */
       color: green;
       /* what about this comment? */ border: 1px $blah red;
-    }
+    };;
     /* yet another comment that should be preserved */
     display: inline-block;
   }  // gone!
@@ -26,7 +26,8 @@ div {
   }
   p {
     padding: 10px 8%;
-    -webkit-box-sizing: $blux;
+    -webkit-box-sizing: $blux; ; ;
+    ; ; ;;;
   }
   margin: 10px 5px;
   h1 {