======== Exception caught by widgets library =======================================================
The following _CastError was thrown building FutureBuilder<Response<Result<APIRecipeQuery>>>(dirty, state: _FutureBuilderState<Response<Result<APIRecipeQuery>>>#7838d):
type 'Null' is not a subtype of type 'Success<dynamic>' in type cast
The relevant error-causing widget was:
FutureBuilder<Response<Result<APIRecipeQuery>>> FutureBuilder:file:///Users/danny.sun/Developer/GitHub/flta-materials/12-using-the-chopper-library/projects/final/lib/ui/recipes/recipe_list.dart:195:12
When the exception was thrown, this was the stack:
#0 _RecipeListState._buildRecipeLoader.<anonymous closure> (package:recipes/ui/recipes/recipe_list.dart:219:33)
#1 _FutureBuilderState.build (package:flutter/src/widgets/async.dart:782:55)
#2 StatefulElement.build (package:flutter/src/widgets/framework.dart:4782:27)
#3 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4665:15)
#4 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:4840:11)
#5 Element.rebuild (package:flutter/src/widgets/framework.dart:4355:5)
#6 BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2620:33)
#7 WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:882:21)
#8 RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:319:5)
#9 SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1143:15)
#10 SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1080:9)
#11 SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:996:5)
#15 _invoke (dart:ui/hooks.dart:166:10)
#16 PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:270:5)
#17 _drawFrame (dart:ui/hooks.dart:129:31)
(elided 3 frames from dart:async)
