flutter: ══╡ EXCEPTION CAUGHT BY ANIMATION LIBRARY ╞═════════════════════════════════════════════════════════
flutter: The following assertion was thrown while notifying status listeners for AnimationController:
flutter: Cannot reuse a MaterialPageRoute<dynamic> after disposing it.
flutter: 'package:flutter/src/widgets/routes.dart': Failed assertion: line 218 pos 12:
flutter: '!_transitionCompleter.isCompleted'
flutter:
flutter: Either the assertion indicates an error in the framework itself, or we should provide substantially
flutter: more information in this error message to help you determine and fix the underlying cause.
flutter: In either case, please report this assertion by filing a bug on GitHub:
flutter:   https://github.com/flutter/flutter/issues/new?template=BUG.md
flutter:
flutter: When the exception was thrown, this was the stack:
flutter: #2      TransitionRoute.didPopNext (package:flutter/src/widgets/routes.dart:218:12)
flutter: #3      NavigatorState.pop (package:flutter/src/widgets/navigator.dart:1944:23)
flutter: #4      _CupertinoBackGestureController._handleStatusChanged (package:flutter/src/cupertino/route.dart:651:17)
flutter: #5      _AnimationController&Animation&AnimationEagerListenerMixin&AnimationLocalListenersMixin&AnimationLocalStatusListenersMixin.notifyStatusListeners (package:flutter/src/animation/listener_helpers.dart:192:19)
flutter: #6      AnimationController._checkStatusChanged (package:flutter/src/animation/animation_controller.dart:736:7)
flutter: #7      AnimationController._tick (package:flutter/src/animation/animation_controller.dart:752:5)
flutter: #8      Ticker._tick (package:flutter/src/scheduler/ticker.dart:228:5)
flutter: #9      _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:990:15)
flutter: #10     _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding.handleBeginFrame.<anonymous closure> (package:flutter/src/scheduler/binding.dart:906:11)
flutter: #11     __InternalLinkedHashMap&_HashVMBase&MapMixin&_LinkedHashMapMixin.forEach (dart:collection/runtime/libcompact_hash.dart:367:8)
flutter: #12     _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding.handleBeginFrame (package:flutter/src/scheduler/binding.dart:904:17)
flutter: #13     _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding._handleBeginFrame (package:flutter/src/scheduler/binding.dart:834:5)
flutter: #17     _invoke1 (dart:ui/hooks.dart:203:10)
flutter: #18     _beginFrame (dart:ui/hooks.dart:156:3)
flutter: (elided 5 frames from class _AssertionError and package dart:async)
flutter:
flutter: The AnimationController notifying status listeners was:
flutter:   AnimationController#f0974(⏮ 0.000; paused; DISPOSED; for
flutter:   MaterialPageRoute<dynamic>(/cupertino/alert))
flutter: ════════════════════════════════════════════════════════════════════════════════════════════════════
flutter: Another exception was thrown: 'package:flutter/src/widgets/navigator.dart': Failed assertion: line 1507 pos 12: '!_debugLocked': is not true.
flutter: Another exception was thrown: 'package:flutter/src/widgets/navigator.dart': Failed assertion: line 1507 pos 12: '!_debugLocked': is not true.
flutter: Another exception was thrown: 'package:flutter/src/widgets/navigator.dart': Failed assertion: line 1507 pos 12: '!_debugLocked': is not true.
flutter: Another exception was thrown: 'package:flutter/src/widgets/navigator.dart': Failed assertion: line 1507 pos 12: '!_debugLocked': is not true.
flutter: Another exception was thrown: 'package:flutter/src/widgets/navigator.dart': Failed assertion: line 1507 pos 12: '!_debugLocked': is not true.
flutter: Another exception was thrown: 'package:flutter/src/widgets/navigator.dart': Failed assertion: line 1507 pos 12: '!_debugLocked': is not true.
flutter: Another exception was thrown: 'package:flutter/src/widgets/navigator.dart': Failed assertion: line 1507 pos 12: '!_debugLocked': is not true.
flutter: Another exception was thrown: 'package:flutter/src/widgets/navigator.dart': Failed assertion: line 1507 pos 12: '!_debugLocked': is not true.
flutter: Another exception was thrown: 'package:flutter/src/widgets/navigator.dart': Failed assertion: line 1507 pos 12: '!_debugLocked': is not true.

Analyzing flutter_gallery...
No issues found! (ran in 5.6s)

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