Fix hang when style.cssText is set to an unrecognized value. Bug

129927, r=dbaron, sr=jst, a=roc+moz

content/html/style/src/nsCSSParser.cpp

@@ -730,6 +730,13 @@ CSSParserImpl::ParseAndAppendDeclaration(const nsAReadableString& aBuffer,
 
       if (NS_FAILED(errorCode))
         break;
+
+      if (!SkipDeclaration(errorCode, PR_FALSE)) {
+        if (errorCode != -1) {
+          rv = errorCode;
+        }
+        break;
+      }
     }
   } while (!aParseOnlyOneDecl);
 

layout/style/nsCSSParser.cpp

@@ -730,6 +730,13 @@ CSSParserImpl::ParseAndAppendDeclaration(const nsAReadableString& aBuffer,
 
       if (NS_FAILED(errorCode))
         break;
+
+      if (!SkipDeclaration(errorCode, PR_FALSE)) {
+        if (errorCode != -1) {
+          rv = errorCode;
+        }
+        break;
+      }
     }
   } while (!aParseOnlyOneDecl);