인프런 커뮤니티 질문&답변

Error: Cannot run with sound null safety, because the following dependencies

don't support null safety:

- package:provider

For solutions, see https://dart.dev/go/unsound-null-safety

/D:/flutter%20sdk/flutter/.pub-cache/hosted/pub.dartlang.org/provider-3.2.0/lib/src/delegate_widget.dart:194:18: Error: Superclass has no method named 'inheritFromElement'.

return super.inheritFromElement(ancestor, aspect: aspect); ^^^^^^^^^^^^^^^^^^

/D:/flutter%20sdk/flutter/.pub-cache/hosted/pub.dartlang.org/provider-3.2.0/lib/src/provider.dart:259:19: Error: The method 'inheritFromWidgetOfExactType' isn't defined for the class 'BuildContext'.

- 'BuildContext' is from 'package:flutter/src/widgets/framework.dart' ('/D:/flutter%20sdk/flutter/packages/flutter/lib/src/widgets/framework.dart'). package:flutter/…/widgets/framework.dart:1

Try correcting the name to the name of an existing method, or defining a method named 'inheritFromWidgetOfExactType'. ? context.inheritFromWidgetOfExactType(type) as InheritedProvider<T> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^

/D:/flutter%20sdk/flutter/.pub-cache/hosted/pub.dartlang.org/provider-3.2.0/lib/src/provider.dart:260:19: Error: The method 'ancestorInheritedElementForWidgetOfExactType' isn't defined for the class 'BuildContext'.

- 'BuildContext' is from 'package:flutter/src/widgets/framework.dart' ('/D:/flutter%20sdk/flutter/packages/flutter/lib/src/widgets/framework.dart'). package:flutter/…/widgets/framework.dart:1

Try correcting the name to the name of an existing method, or defining a method named 'ancestorInheritedElementForWidgetOfExactType'. : context.ancestorInheritedElementForWidgetOfExactType(type)?.widget ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^