修复面包屑显示不正确的问题 （如`/issues/new` 会被认为`/issues/:id`） (#801)

src/components/PageHeader/index.js

@@ -9,13 +9,15 @@ import styles from './index.less';
 const { TabPane } = Tabs;
 
 function getBreadcrumb(breadcrumbNameMap, url) {
-  let breadcrumb = {};
+  let breadcrumb = breadcrumbNameMap[url];
+  if (!breadcrumb) {
     Object.keys(breadcrumbNameMap).forEach((item) => {
       if (pathToRegexp(item).test(url)) {
         breadcrumb = breadcrumbNameMap[item];
       }
     });
-  return breadcrumb;
+  }
+  return breadcrumb || {};
 }
 
 export default class PageHeader extends PureComponent {