game_template has navigation error

[craiglabenz]

After pressing the AppBar's Back button from the level screen, the following logs appear:

SEVERE: 2022-05-28 10:54:16.715: GoRouter: Exception during GoRouter navigation
SEVERE: 2022-05-28 10:54:16.715: GoRouter: Exception during GoRouter navigation

And the screen looks like this:

[glsee]

In my case, the AppBar is already disabled and hidden from view in the template. I'm unable to trigger the error.

[ChristianEdwardPadilla]

I can repro this on web (doesn't repro on mobile).

Steps:

1. Navigate to a level and win.
2. Wait for confetti animation to end and press "continue".
3. Try to navigate back.
4. Observe error.

On mobile, step 3 leads back to the initial app screen.

Stack trace:

══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════
The following TypeErrorImpl was thrown building Builder(dependencies:
[_InheritedProviderScope<Palette?>]):
Unexpected null value.

The relevant error-causing widget was:
  Builder
  ub.dev/go_router-7.1.1/lib/src/builder.dart:93:7

When the exception was thrown, this was the stack:
dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/errors.dart 288:49      throw_
dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/operations.dart 606:63  nullCheck
packages/game_template/main.dart 161:46                                           <fn>
packages/go_router/src/builder.dart 354:25                                        [_buildPageForGoRoute]
packages/go_router/src/builder.dart 212:14                                        [_buildRecursive]
packages/go_router/src/builder.dart 220:7                                         [_buildRecursive]
packages/go_router/src/builder.dart 220:7                                         [_buildRecursive]
packages/go_router/src/builder.dart 153:7                                         [_buildPages]
packages/go_router/src/builder.dart 132:9                                         tryBuild
packages/go_router/src/builder.dart 98:35                                         <fn>
packages/flutter/src/widgets/basic.dart 7531:48                                   build
packages/flutter/src/widgets/framework.dart 5156:22                               build
packages/flutter/src/widgets/framework.dart 5086:15                               performRebuild
packages/flutter/src/widgets/framework.dart 4805:7                                rebuild
packages/flutter/src/widgets/framework.dart 5162:5                                update
packages/flutter/src/widgets/framework.dart 3686:14                               updateChild
packages/flutter/src/widgets/framework.dart 5111:16                               performRebuild
packages/flutter/src/widgets/framework.dart 4805:7                                rebuild
packages/flutter/src/widgets/framework.dart 5417:5                                update
packages/flutter/src/widgets/inherited_notifier.dart 107:11                       update
packages/flutter/src/widgets/framework.dart 3686:14                               updateChild
packages/flutter/src/widgets/framework.dart 5111:16                               performRebuild
packages/flutter/src/widgets/framework.dart 4805:7                                rebuild
packages/flutter/src/widgets/framework.dart 5162:5                                update
packages/flutter/src/widgets/framework.dart 3686:14                               updateChild
packages/flutter/src/widgets/framework.dart 5111:16                               performRebuild
packages/flutter/src/widgets/framework.dart 4805:7                                rebuild
packages/flutter/src/widgets/framework.dart 5417:5                                update
packages/flutter/src/widgets/framework.dart 3686:14                               updateChild
packages/flutter/src/widgets/framework.dart 5111:16                               performRebuild
packages/flutter/src/widgets/framework.dart 4805:7                                rebuild
packages/flutter/src/widgets/framework.dart 5417:5                                update
packages/flutter/src/widgets/framework.dart 3686:14                               updateChild
packages/flutter/src/widgets/framework.dart 5111:16                               performRebuild
packages/flutter/src/widgets/framework.dart 5251:11                               performRebuild
packages/flutter/src/widgets/framework.dart 4805:7                                rebuild
packages/flutter/src/widgets/framework.dart 2780:18                               buildScope
packages/flutter/src/widgets/binding.dart 903:9                                   drawFrame
packages/flutter/src/rendering/binding.dart 358:5                                 [_handlePersistentFrameCallback]
packages/flutter/src/scheduler/binding.dart 1284:15                               [_invokeFrameCallback]
packages/flutter/src/scheduler/binding.dart 1214:9                                handleDrawFrame
packages/flutter/src/scheduler/binding.dart 1072:5                                [_handleDrawFrame]
dart-sdk/lib/async/zone.dart 1399:13                                              _rootRun
dart-sdk/lib/async/zone.dart 1301:19                                              run
dart-sdk/lib/async/zone.dart 1209:7                                               runGuarded
lib/_engine/engine/platform_dispatcher.dart 1238:9                                invoke
lib/_engine/engine/platform_dispatcher.dart 244:5                                 invokeOnDrawFrame
lib/_engine/engine/initialization.dart 190:45                                     <fn>

[domesticmouse]

PTAL @filiph

[filiph]

Just confirming I'm on this. Thanks for your patience!