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best-flutter / flutter_dropdown_menu

A dropdown menu for Flutter.
MIT License
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_ElementLifecycle.defunct': is not true. #14

Open ryanhz opened 5 years ago

ryanhz commented 5 years ago

Either the assertion indicates an error in the framework itself, or we should provide substantially more information in this error message to help you determine and fix the underlying cause. In either case, please report this assertion by filing a bug on GitHub: https://github.com/flutter/flutter/issues/new?template=BUG.md

When the exception was thrown, this was the stack: 2 Element.markNeedsBuild (package:flutter/src/widgets/framework.dart:3641:12) 3 State.setState (package:flutter/src/widgets/framework.dart:1161:14) 4 _DropdownMenuState._handleShow (package:dropdown_menu/_src/dropdown_menu.dart:316:5) 5 _DropdownMenuState.onShow (package:dropdown_menu/_src/dropdown_menu.dart:310:12) 6 _DropdownMenuState.onEvent (package:dropdown_menu/_src/dropdown_menu.dart:355:11) 7 DropdownState._onController (package:dropdown_menu/_src/drapdown_common.dart:189:5) 8 ChangeNotifier.notifyListeners (package:flutter/src/foundation/change_notifier.dart:206:21) 9 DropdownMenuController.show (package:dropdown_menu/_src/drapdown_common.dart:39:5) 10 _DropdownHeaderState.buildItem. (package:dropdown_menu/_src/dropdown_header.dart:88:24) 11 GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:182:24) 12 TapGestureRecognizer._checkUp (package:flutter/src/gestures/tap.dart:365:11) 13 TapGestureRecognizer.handlePrimaryPointer (package:flutter/src/gestures/tap.dart:275:7) 14 PrimaryPointerGestureRecognizer.handleEvent (package:flutter/src/gestures/recognizer.dart:455:9) 15 PointerRouter._dispatch (package:flutter/src/gestures/pointer_router.dart:75:13) 16 PointerRouter.route (package:flutter/src/gestures/pointer_router.dart:102:11) 17 _WidgetsFlutterBinding&BindingBase&GestureBinding.handleEvent (package:flutter/src/gestures/binding.dart:218:19) 18 _WidgetsFlutterBinding&BindingBase&GestureBinding.dispatchEvent (package:flutter/src/gestures/binding.dart:198:22) 19 _WidgetsFlutterBinding&BindingBase&GestureBinding._handlePointerEvent (package:flutter/src/gestures/binding.dart:156:7) 20 _WidgetsFlutterBinding&BindingBase&GestureBinding._flushPointerEventQueue (package:flutter/src/gestures/binding.dart:102:7) 21 _WidgetsFlutterBinding&BindingBase&GestureBinding._handlePointerDataPacket (package:flutter/src/gestures/binding.dart:86:7) 25 _invoke1 (dart:ui/hooks.dart:250:10) 26 _dispatchPointerDataPacket (dart:ui/hooks.dart:159:5) (elided 5 frames from class _AssertionError and package dart:async)

The DropdownMenuController sending notification was: Instance of 'DropdownMenuController'