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LateInitializationError on Flutter 3.7.0 (solution included)

Open TeoVogel opened this issue 3 years ago • 12 comments

After upgrading to Flutter 3.7.0 an error popped on a specific scenario using the StaggeredGridView:

  @override
  Widget build(BuildContext context) {
    return StaggeredGrid.count(
      crossAxisCount: 7,
      mainAxisSpacing: 1,
      crossAxisSpacing: 1,
      children: [
        StaggeredGridTile.count(
          crossAxisCellCount: 7,
          mainAxisCellCount: 1,
          child: FittedBox(
            fit: BoxFit.contain,
            child: Padding(
              padding: const EdgeInsets.all(8.0),
              child: Text(DateFormat(DateFormat.MONTH).format(DateTime.now())),
            ),
          ),
        )
      ],
    );
  }

Throws:

══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════
The following LateError was thrown building PixelsCalendar:
LateInitializationError: Field '_children@38042623' has not been initialized.

The relevant error-causing widget was:
  PixelsCalendar
  PixelsCalendar:file:///Users/teovogel/Documents/GitHub/pixels_flutter/lib/core/main/pixels/pixels_screen.dart:34:19

When the exception was thrown, this was the stack:
#0      MultiChildRenderObjectElement._children (package:flutter/src/widgets/framework.dart)
#1      MultiChildRenderObjectElement.visitChildren (package:flutter/src/widgets/framework.dart:6473:33)
#2      Element.debugDescribeChildren (package:flutter/src/widgets/framework.dart:4576:5)
#3      DiagnosticableTreeNode.getChildren (package:flutter/src/foundation/diagnostics.dart:3003:48)
#4      TextTreeRenderer._debugRender (package:flutter/src/foundation/diagnostics.dart:1219:43)
#5      TextTreeRenderer.render (package:flutter/src/foundation/diagnostics.dart:1151:14)
#6      DiagnosticsNode.toStringDeep.<anonymous closure> (package:flutter/src/foundation/diagnostics.dart:1816:9)
#7      DiagnosticsNode.toStringDeep (package:flutter/src/foundation/diagnostics.dart:1823:6)
#8      DiagnosticsNode.toString.<anonymous closure> (package:flutter/src/foundation/diagnostics.dart:1734:18)
#9      DiagnosticsNode.toString (package:flutter/src/foundation/diagnostics.dart:1746:6)
#10     Diagnosticable.toString.<anonymous closure> (package:flutter/src/foundation/diagnostics.dart:3131:78)
#11     Diagnosticable.toString (package:flutter/src/foundation/diagnostics.dart:3133:6)
#12     _StringBase._interpolate (dart:core-patch/string_patch.dart:851:19)
#13     Scrollable.of.<anonymous closure> (package:flutter/src/widgets/scrollable.dart:336:27)
#14     Scrollable.of (package:flutter/src/widgets/scrollable.dart:348:6)
#15     StaggeredGrid.createRenderObject (package:flutter_staggered_grid_view/src/widgets/staggered_grid.dart:85:22)
#16     RenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5817:52)
#17     MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6519:11)
...     Normal element mounting (13 frames)
#30     Element.inflateWidget (package:flutter/src/widgets/framework.dart:3953:16)
#31     MultiChildRenderObjectElement.inflateWidget (package:flutter/src/widgets/framework.dart:6512:36)
#32     MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6524:32)
...     Normal element mounting (25 frames)
#57     Element.inflateWidget (package:flutter/src/widgets/framework.dart:3953:16)
#58     MultiChildRenderObjectElement.inflateWidget (package:flutter/src/widgets/framework.dart:6512:36)
#59     MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6524:32)
...     Normal element mounting (111 frames)
#170    SingleChildWidgetElementMixin.mount (package:nested/nested.dart:222:11)
...     Normal element mounting (49 frames)
#219    Element.inflateWidget (package:flutter/src/widgets/framework.dart:3953:16)
#220    MultiChildRenderObjectElement.inflateWidget (package:flutter/src/widgets/framework.dart:6512:36)
#221    MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6524:32)
...     Normal element mounting (142 frames)
#363    Element.inflateWidget (package:flutter/src/widgets/framework.dart:3953:16)
#364    MultiChildRenderObjectElement.inflateWidget (package:flutter/src/widgets/framework.dart:6512:36)
#365    MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6524:32)
...     Normal element mounting (172 frames)
#537    Element.inflateWidget (package:flutter/src/widgets/framework.dart:3953:16)
#538    MultiChildRenderObjectElement.inflateWidget (package:flutter/src/widgets/framework.dart:6512:36)
#539    MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6524:32)
...     Normal element mounting (492 frames)
#1031   SingleChildWidgetElementMixin.mount (package:nested/nested.dart:222:11)
...     Normal element mounting (7 frames)
#1038   _InheritedProviderScopeElement.mount (package:provider/src/inherited_provider.dart:411:11)
...     Normal element mounting (7 frames)
#1045   SingleChildWidgetElementMixin.mount (package:nested/nested.dart:222:11)
...     Normal element mounting (7 frames)
#1052   _NestedHookElement.mount (package:nested/nested.dart:187:11)
...     Normal element mounting (7 frames)
#1059   _InheritedProviderScopeElement.mount (package:provider/src/inherited_provider.dart:411:11)
...     Normal element mounting (7 frames)
#1066   SingleChildWidgetElementMixin.mount (package:nested/nested.dart:222:11)
...     Normal element mounting (7 frames)
#1073   _NestedHookElement.mount (package:nested/nested.dart:187:11)
...     Normal element mounting (7 frames)
#1080   _InheritedProviderScopeElement.mount (package:provider/src/inherited_provider.dart:411:11)
...     Normal element mounting (7 frames)
#1087   SingleChildWidgetElementMixin.mount (package:nested/nested.dart:222:11)
...     Normal element mounting (7 frames)
#1094   _NestedHookElement.mount (package:nested/nested.dart:187:11)
...     Normal element mounting (7 frames)
#1101   _InheritedProviderScopeElement.mount (package:provider/src/inherited_provider.dart:411:11)
...     Normal element mounting (7 frames)
#1108   SingleChildWidgetElementMixin.mount (package:nested/nested.dart:222:11)
...     Normal element mounting (7 frames)
#1115   _NestedHookElement.mount (package:nested/nested.dart:187:11)
...     Normal element mounting (7 frames)
#1122   _InheritedProviderScopeElement.mount (package:provider/src/inherited_provider.dart:411:11)
...     Normal element mounting (7 frames)
#1129   SingleChildWidgetElementMixin.mount (package:nested/nested.dart:222:11)
...     Normal element mounting (7 frames)
#1136   _NestedHookElement.mount (package:nested/nested.dart:187:11)
...     Normal element mounting (7 frames)
#1143   _InheritedProviderScopeElement.mount (package:provider/src/inherited_provider.dart:411:11)
...     Normal element mounting (7 frames)
#1150   SingleChildWidgetElementMixin.mount (package:nested/nested.dart:222:11)
...     Normal element mounting (7 frames)
#1157   _NestedHookElement.mount (package:nested/nested.dart:187:11)
...     Normal element mounting (7 frames)
#1164   SingleChildWidgetElementMixin.mount (package:nested/nested.dart:222:11)
...     Normal element mounting (7 frames)
#1171   Element.inflateWidget (package:flutter/src/widgets/framework.dart:3953:16)
#1172   Element.updateChild (package:flutter/src/widgets/framework.dart:3682:18)
#1173   RenderObjectToWidgetElement._rebuild (package:flutter/src/widgets/binding.dart:1176:16)
#1174   RenderObjectToWidgetElement.mount (package:flutter/src/widgets/binding.dart:1145:5)
#1175   RenderObjectToWidgetAdapter.attachToRenderTree.<anonymous closure> (package:flutter/src/widgets/binding.dart:1092:18)
#1176   BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2682:19)
#1177   RenderObjectToWidgetAdapter.attachToRenderTree (package:flutter/src/widgets/binding.dart:1091:13)
#1178   WidgetsBinding.attachRootWidget (package:flutter/src/widgets/binding.dart:926:7)
#1179   WidgetsBinding.scheduleAttachRootWidget.<anonymous closure> (package:flutter/src/widgets/binding.dart:906:7)
#1183   _RawReceivePort._handleMessage (dart:isolate-patch/isolate_patch.dart:192:26)
(elided 3 frames from class _Timer and dart:async-patch)

════════════════════════════════════════════════════════════════════════════════════════════════════

SOLUTION

Adding the parameter "axisDirection" solves the issue. Maybe it should be a required parameter from now on?

@override
Widget build(BuildContext context) {
  return StaggeredGrid.count(
    axisDirection: AxisDirection.down, // <----- Add this line
    crossAxisCount: 7,
    mainAxisSpacing: 1,
    crossAxisSpacing: 1,
    children: [
      StaggeredGridTile.count(
        crossAxisCellCount: 7,
        mainAxisCellCount: 1,
        child: FittedBox(
          fit: BoxFit.contain,
          child: Padding(
            padding: const EdgeInsets.all(8.0),
            child: Text(DateFormat(DateFormat.MONTH).format(DateTime.now())),
          ),
        ),
      )
    ],
  );
}

TeoVogel avatar Jan 25 '23 17:01 TeoVogel

So much time saved, thanks for taking the time to post the solution. Just for future reference, how did you figure that solution out? I was completely lost...

tiger5226 avatar Feb 03 '23 20:02 tiger5226

@tiger5226 Glad it helped! I discovered it by pure chance, I was using the grid view with that parameter in other part of my app, where it wasn't crashing

TeoVogel avatar Feb 04 '23 21:02 TeoVogel

Great solution! Thank you!

dkarakay avatar Mar 07 '23 21:03 dkarakay

nice info brow

naneps avatar Mar 12 '23 14:03 naneps

you save my day

nantaphop-kkp avatar Mar 22 '23 06:03 nantaphop-kkp

Very nice brow 🤙

umbrellait-andrey-sosnovyy avatar Mar 22 '23 14:03 umbrellait-andrey-sosnovyy

Encountered the same error. Would be nice, if the parameter would be required for newer flutter versions. :)

Wegi avatar Mar 29 '23 13:03 Wegi

I might love you

MarcoMedri avatar Apr 02 '23 17:04 MarcoMedri

Love you!

programmingCris avatar Apr 05 '23 12:04 programmingCris

I don't reproduce with Flutter 3.7.10, do you?

letsar avatar Apr 14 '23 19:04 letsar

Thankyou for this solution

AliLaqa avatar Jun 01 '23 20:06 AliLaqa

nice

naneps avatar Jun 04 '23 16:06 naneps