Null check operator used on a null value

[heafox]

Describe the bug A clear and concise description of what the bug is.

════════ Exception caught by widgets library ═══════════════════════════════════ The following _TypeError was thrown building GroupedListView<Device, DeviceType>(dirty, state: _GroupedListViewState<Device, DeviceType>#01414): Null check operator used on a null value

The relevant error-causing widget was: GroupedListView<Device, DeviceType> GroupedListView:file:///C:/Users/94093/Documents/hpc/over_ip_pad/lib/settings/device_control_view.dart:27:26

When the exception was thrown, this was the stack: #0 _GroupedListViewState._sortElements. (package:grouped_list/grouped_list.dart:509:29) grouped_list.dart:509 #1 Sort._insertionSort (dart:_internal/sort.dart:69:36) sort.dart:69 #2 Sort._doSort (dart:_internal/sort.dart:58:7) sort.dart:58 #3 Sort.sort (dart:_internal/sort.dart:33:5) sort.dart:33 #4 ListBase.sort (dart:collection/list.dart:321:10) list.dart:321 #5 _GroupedListViewState._sortElements (package:grouped_list/grouped_list.dart:491:16) grouped_list.dart:491 #6 _GroupedListViewState.build (package:grouped_list/grouped_list.dart:312:23) grouped_list.dart:312 #7 StatefulElement.build (package:flutter/src/widgets/framework.dart:5729:27) framework.dart:5729 #8 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5617:15) framework.dart:5617 #9 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5780:11) framework.dart:5780 #10 Element.rebuild (package:flutter/src/widgets/framework.dart:5333:7) framework.dart:5333 #11 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:5599:5) framework.dart:5599 #12 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:5771:11) framework.dart:5771 #13 ComponentElement.mount (package:flutter/src/widgets/framework.dart:5593:5) framework.dart:5593 #14 Element.inflateWidget (package:flutter/src/widgets/framework.dart:4468:16) framework.dart:4468 #15 Element.updateChild (package:flutter/src/widgets/framework.dart:3957:20) framework.dart:3957 #16 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5642:16) framework.dart:5642 #17 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5780:11) framework.dart:5780 #18 Element.rebuild (package:flutter/src/widgets/framework.dart:5333:7) framework.dart:5333 #19 BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2693:15) framework.dart:2693 #20 BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2752:11) framework.dart:2752 #21 BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3048:18) framework.dart:3048 #22 WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1162:21) binding.dart:1162 #23 RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:468:5) binding.dart:468 #24 SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1397:15) binding.dart:1397 #25 SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1318:9) binding.dart:1318 #26 SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1176:5) binding.dart:1176 #27 _invoke (dart:ui/hooks.dart:312:13) hooks.dart:312 #28 PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:419:5) platform_dispatcher.dart:419 #29 _drawFrame (dart:ui/hooks.dart:283:31) hooks.dart:283

Expected behavior A clear and concise description of what you expected to happen.

I don't want the list to be reordered

Information:

• Dart version: 3.5
• Flutter version: 3.24.3
• Platform: Windows 11
• Package version: 6.0.0