(debug mode normal, release mode grey ) Another exception was thrown: Instance of 'DiagnosticsProperty'

 進入debug模式進行調試發現錯誤

======== Exception caught by widgets library =======================================================

The following assertion was thrown while applying parent data.:

Incorrect use of ParentDataWidget.

The ParentDataWidget Expanded(flex: 1) wants to apply ParentData of type FlexParentData to a RenderObject, which has been set up to accept ParentData of incompatible type StackParentData.

Usually, this means that the Expanded widget has the wrong ancestor RenderObjectWidget. Typically, Expanded widgets are placed directly inside Flex widgets.

The offending Expanded is currently placed inside a Stack widget.

針對Exception 處理問題