example error

[kadirkos]

════════ Exception caught by gesture ═══════════════════════════════════════════
The following _TypeError was thrown while handling a gesture:
type 'List<Animal?>' is not a subtype of type 'List?' of 'value'

When the exception was thrown, this was the stack
#0 FormFieldState.didChange (package:flutter/src/widgets/form.dart)
#1 __MultiSelectDialogFieldViewState._showDialog..
#2 MultiSelectActions.onConfirmTap
#3 _MultiSelectDialogState.build.
#4 _InkResponseState._handleTap
#5 GestureRecognizer.invokeCallback
#6 TapGestureRecognizer.handleTapUp
#7 BaseTapGestureRecognizer._checkUp
#8 BaseTapGestureRecognizer.handlePrimaryPointer
#9 PrimaryPointerGestureRecognizer.handleEvent
#10 PointerRouter._dispatch
#11 PointerRouter._dispatchEventToRoutes.
#12 _LinkedHashMapMixin.forEach (dart:collection-patch/compact_hash.dart:539:8)
#13 PointerRouter._dispatchEventToRoutes
#14 PointerRouter.route
#15 GestureBinding.handleEvent
#16 GestureBinding.dispatchEvent
#17 RendererBinding.dispatchEvent
#18 GestureBinding._handlePointerEventImmediately
#19 GestureBinding.handlePointerEvent
#20 GestureBinding._flushPointerEventQueue
#21 GestureBinding._handlePointerDataPacket
#25 _invoke1 (dart:ui/hooks.dart:169:10)
#26 PlatformDispatcher._dispatchPointerDataPacket (dart:ui/platform_dispatcher.dart:293:7)
#27 _dispatchPointerDataPacket (dart:ui/hooks.dart:88:31)
(elided 3 frames from dart:async)
Handler: "onTap"
Recognizer: TapGestureRecognizer#d01fa
debugOwner: GestureDetector
state: possible
won arena
finalPosition: Offset(317.3, 638.4)
finalLocalPosition: Offset(35.5, 29.0)
button: 1
sent tap down
════════════════════════════════════════════════════════════════════════════════

[anglesen1120]

final _items = _animals
.map((animal) => MultiSelectItem<Animal?>(animal, animal.name))
.toList(); will be fix your issue

[GabrielLana]

I'm having the same issue, already tried this approach, but still getting the same error:

[GabrielLana]

Well now I solved my problem, I just did a cast to "values", and now its working.

[shinriyo]

final _items = _animals
    .map((animal) => MultiSelectItem<Animal?>(animal, animal.name))
    .toList();