Json_serializable.dart: fail: flutter packages pub run build_runner build --verbose

[hatjs880328s]

flutter packages pub run build_runner build --verbose
[INFO] Generating build script...
[INFO] Generating build script completed, took 355ms

[INFO] BuildDefinition:Initializing inputs
[INFO] BuildDefinition:Building new asset graph...
[INFO] BuildDefinition:Building new asset graph completed, took 661ms

[INFO] BuildDefinition:Checking for unexpected pre-existing outputs....
[INFO] BuildDefinition:Found 7 declared outputs which already exist on disk. This is likely because the.dart_tool/build folder was deleted, or you are submitting generated files to your source repository.
[SEVERE] BuildDefinition:
Conflicting outputs were detected and the build is unable to prompt for permission to remove them. These outputs must be removed manually or the build can be run with --delete-conflicting-outputs. The outputs are: lib/Model/user.g.dart
lib/Model/IIExcMODELS/IIExcMainListModel.g.dart
lib/Model/IIExcMODELS/IIExcFolderModel.g.dart
lib/Model/IIExcMODELS/IIExcSidebarList.g.dart
lib/Model/LoginToken.g.dart
lib/Model/MoveCar/MoveCarModel.g.dart
lib/Model/MoveCar/MoveCarSmallModel.g.dart
pub finished with exit code 78

0 throwToolExit (package:flutter_tools/src/base/common.dart:24:3)

1 pubInteractively (package:flutter_tools/src/dart/pub.dart:186:5)

2 PackagesPassthroughCommand.runCommand (package:flutter_tools/src/commands/packages.dart:148:11)

3 FlutterCommand.verifyThenRunCommand (package:flutter_tools/src/runner/flutter_command.dart:545:18)

4 _asyncThenWrapperHelper. (dart:async/runtime/libasync_patch.dart:77:64)

5 _rootRunUnary (dart:async/zone.dart:1132:38)

6 _CustomZone.runUnary (dart:async/zone.dart:1029:19)

7 _FutureListener.handleValue (dart:async/future_impl.dart:126:18)

8 Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:639:45)

9 Future._propagateToListeners (dart:async/future_impl.dart:668:32)

10 Future._complete (dart:async/future_impl.dart:473:7)

11 _SyncCompleter.complete (dart:async/future_impl.dart:51:12)

12 _AsyncAwaitCompleter.complete. (dart:async/runtime/libasync_patch.dart:33:20)

13 _rootRun (dart:async/zone.dart:1124:13)

14 _CustomZone.run (dart:async/zone.dart:1021:19)

15 _CustomZone.bindCallback. (dart:async/zone.dart:947:23)

16 _microtaskLoop (dart:async/schedule_microtask.dart:41:21)

17 _startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5)

18 _runPendingImmediateCallback (dart:isolate/runtime/libisolate_patch.dart:115:13)

19 _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:172:5)

[kevmoo]

did you try to run build_runner clean and then your build again?

[anztrax]

thanks that's works for me @kevmoo 🎉

[ImranSefat]

I have the same problem. Ran flutter packages pub run build_runner clean then flutter packages pub run build_runner build but didn't work