报错：'Logger.onLevelChanged' is defined here.

[caoshouling]

PS D:\workspace\mobileSpace\flutter_githubclient_app> flutter packages pub run json_model
Flutter assets will be downloaded from https://storage.flutter-io.cn. Make sure you trust this source!
Failed to build json_model:json_model:
/C:/Users/Administrator/AppData/Local/Pub/Cache/hosted/pub.flutter-io.cn/build_runner_core-7.2.2/lib/src/logging/build_for_input_logger.dart:13:7: Error: The non-abstract class 'BuildForInputLogger' is missing implementations for these members:

• Logger.onLevelChanged
  Try to either
• provide an implementation,
• mark the class as abstract, or
• provide a 'noSuchMethod' implementation.

class BuildForInputLogger implements Logger {
^^^^^^^^^^^^^^^^^^^
/C:/Users/Administrator/AppData/Local/Pub/Cache/hosted/pub.flutter-io.cn/logging-1.2.0/lib/src/logger.dart:162:22: Context: 'Logger.onLevelChanged' is defined here.
Stream<Level?> get onLevelChanged {
^^^^^^^^^^^^^^

[Stronglittleboy]

我解决了这个问题，删除pubspec.lock文件，然后dart pub upgrade，应该就解决了

[JieHaoCai]

我也遇到了这个问题

[JieHaoCai]

我解决了这个问题，删除pubspec.lock文件，然后dart pub upgrade，应该就解决了

不行

[pingia]

I resolved the same error by following the below link:
dart-lang/build#3519 (comment)