flutter - 错误仅在当前文件打开并在视图中时显示

Question

该错误仅在我的 SecondPage.dart 文件当前打开时显示。

当我在 HomePage 中然后导航到 SecondPage 时会发生什么，而我的 HomePage.dart 文件当前处于打开状态并且在 android studio 上查看时，没有显示错误。但是，如果我在 SecondPage.dart 文件打开时执行相同的过程，则会出现错误。

抱歉，我无法提供代码，因为已经有很多行了，我真的不知道是哪一部分导致了它。

======== Exception caught by Flutter framework =====================================================
The following _CastError was thrown during a service extension callback for "ext.flutter.inspector.getRootWidgetSummaryTree":
Null check operator used on a null value

When the exception was thrown, this was the stack: 
#0      WidgetInspectorService._registerObjectGroupServiceExtension.<anonymous closure> (package:flutter/src/widgets/widget_inspector.dart:798:84)
#1      WidgetInspectorService._registerObjectGroupServiceExtension.<anonymous closure> (package:flutter/src/widgets/widget_inspector.dart:797:17)
#2      BindingBase.registerServiceExtension.<anonymous closure> (package:flutter/src/foundation/binding.dart:604:32)
<asynchronous suspension>
====================================================================================================

标签： flutterflutter-layoutflutter-dependenciesflutter-android