fix(rich-text): 内容包含注释报错的bug (question/186587)

src/core/view/components/rich-text/html-parser.js

@@ -92,10 +92,12 @@ export default function parseHtml (html) {
         text: text
       }
       const parent = stacks[0]
-      if (!parent.children) {
-        parent.children = []
+      if (parent) {
+        if (!parent.children) {
+          parent.children = []
+        }
+        parent.children.push(node)
       }
-      parent.children.push(node)
     }
   })
   return results.children