【报Bug】 Cannot read property 'subpackages' of undefined

今天下午来上班 提示更新 更新完了才有这种情况 以前没遇到过
我只要一改page.json文件 就报错
page.json文件 加东西 不报错 删东西（比如删个"disableScroll": true）报如下错误

17:18:38.318 pages.json解析失败  
17:18:38.318 TypeError: Cannot read property 'subpackages' of undefined  
17:18:38.318     at processPagesJson (D:\Program Files\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\uni-cli-shared\lib\pages.js:73:17)  
17:18:38.318     at getPagesJson (D:\Program Files\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\uni-cli-shared\lib\pages.js:38:10)  
17:18:38.334     at parseEntry (D:\Program Files\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\uni-cli-shared\lib\pages.js:224:17)  
17:18:38.334     at D:\Program Files\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\webpack-uni-mp-loader\lib\plugin\index-new.js:135:13  
17:18:38.334     at SyncHook.eval [as call] (eval at create (D:\Program Files\HBuilderX\plugins\uniapp-cli\node_modules\tapable\lib\HookCodeFactory.js:19:10), <anonymous>:7:1)  
17:18:38.334     at Watchpack.<anonymous> (D:\Program Files\HBuilderX\plugins\uniapp-cli\node_modules\webpack\lib\Watching.js:142:33)  
17:18:38.334     at Object.onceWrapper (events.js:421:26)  
17:18:38.334     at Watchpack.emit (events.js:314:20)  
17:18:38.334     at Watchpack._onChange (D:\Program Files\HBuilderX\plugins\uniapp-cli\node_modules\watchpack\lib\watchpack.js:118:7)  
17:18:38.334     at Watchpack.<anonymous> (D:\Program Files\HBuilderX\plugins\uniapp-cli\node_modules\watchpack\lib\watchpack.js:99:8)  
17:18:38.350     at Watcher.emit (events.js:314:20)  
17:18:38.350     at D:\Program Files\HBuilderX\plugins\uniapp-cli\node_modules\watchpack\lib\DirectoryWatcher.js:109:7  
17:18:38.350     at Array.forEach (<anonymous>)  
17:18:38.350     at DirectoryWatcher.setFileTime (D:\Program Files\HBuilderX\plugins\uniapp-cli\node_modules\watchpack\lib\DirectoryWatcher.js:108:41)  
17:18:38.350     at DirectoryWatcher.onChange (D:\Program Files\HBuilderX\plugins\uniapp-cli\node_modules\watchpack\lib\DirectoryWatcher.js:264:7)  
17:18:38.350     at FSWatcher.emit (events.js:314:20)