Projeto com Modular não completa o build_runner build

Neo

Olá, estou fazendo um projeto somente para fins de estudo.
Estou utilizando os seguintes pacotes: flutter_mobx, mobx, flutter_modular, modular_codegen, mobx_codegen, build_runner.
Estou tentando rodar o comando flutter pub run build_runner build --delete-conflicting-outputs mas o comando nunca completa a execução:

C:\src\flutter\bin\cache\pkg\sky_engine\lib\ui\channel_buffers.dart:119:41 - This requires the 'non-nullable' language feature to be enabled.   
C:\src\flutter\bin\cache\pkg\sky_engine\lib\ui\channel_buffers.dart:133:32 - This requires the 'non-nullable' language feature to be enabled.   
C:\src\flutter\bin\cache\pkg\sky_engine\lib\ui\channel_buffers.dart:186:51 - This requires the 'non-nullable' language feature to be enabled.   
C:\src\flutter\bin\cache\pkg\sky_engine\lib\ui\channel_buffers.dart:88:62 - This requires the 'non-nullable' language feature to be enabled.    
C:\src\flutter\bin\cache\pkg\sky_engine\lib\ui\channel_buffers.dart:153:38 - This requires the 'non-nullable' language feature to be enabled.   
C:\src\flutter\bin\cache\pkg\sky_engine\lib\ui\channel_buffers.dart:64:4 - This requires the 'non-nullable' language feature to be enabled.     
C:\src\flutter\bin\cache\pkg\sky_engine\lib\ui\channel_buffers.dart:154:25 - This requires the 'non-nullable' language feature to be enabled.   
C:\src\flutter\bin\cache\pkg\sky_engine\lib\ui\channel_buffers.dart:18:17 - This requires the 'non-nullable' language feature to be enabled.    
C:\src\flutter\bin\cache\pkg\sky_engine\lib\ui\channel_buffers.dart:118:48 - This requires the 'non-nullable' language feature to be enabled.   
C:\src\flutter\bin\cache\pkg\sky_engine\lib\ui\channel_buffers.dart:132:37 - This requires the 'non-nullable' language feature to be enabled.   
C:\src\flutter\bin\cache\pkg\sky_engine\lib\ui\channel_buffers.dart:19:11 - This requires the 'non-nullable' language feature to be enabled.    
C:\src\flutter\bin\cache\pkg\sky_engine\lib\ui\channel_buffers.dart:159:38 - This requires the 'non-nullable' language feature to be enabled.   
C:\src\flutter\bin\cache\pkg\sky_engine\lib\ui\channel_buffers.dart:168:32 - This requires the 'non-nullable' language feature to be enabled.   
C:\src\flutter\bin\cache\pkg\sky_engine\lib\ui\channel_buffers.dart:47:14 - This requires the 'non-nullable' language feature to be enabled.    
[SEVERE] mobx_codegen:mobx_generator on lib/app/app_controller.dart:

Bad state: Unexpected diagnostics:
C:\src\flutter\bin\cache\pkg\sky_engine\lib\ui\channel_buffers.dart:152:17 - This requires the 'non-nullable' language feature to be enabled.   
C:\src\flutter\bin\cache\pkg\sky_engine\lib\ui\channel_buffers.dart:119:41 - This requires the 'non-nullable' language feature to be enabled.   
C:\src\flutter\bin\cache\pkg\sky_engine\lib\ui\channel_buffers.dart:133:32 - This requires the 'non-nullable' language feature to be enabled.   
C:\src\flutter\bin\cache\pkg\sky_engine\lib\ui\channel_buffers.dart:186:51 - This requires the 'non-nullable' language feature to be enabled.   
C:\src\flutter\bin\cache\pkg\sky_engine\lib\ui\channel_buffers.dart:88:62 - This requires the 'non-nullable' language feature to be enabled.    
C:\src\flutter\bin\cache\pkg\sky_engine\lib\ui\channel_buffers.dart:153:38 - This requires the 'non-nullable' language feature to be enabled.   
C:\src\flutter\bin\cache\pkg\sky_engine\lib\ui\channel_buffers.dart:64:4 - This requires the 'non-nullable' language feature to be enabled.     
C:\src\flutter\bin\cache\pkg\sky_engine\lib\ui\channel_buffers.dart:154:25 - This requires the 'non-nullable' language feature to be enabled.   
C:\src\flutter\bin\cache\pkg\sky_engine\lib\ui\channel_buffers.dart:18:17 - This requires the 'non-nullable' language feature to be enabled.    
C:\src\flutter\bin\cache\pkg\sky_engine\lib\ui\channel_buffers.dart:118:48 - This requires the 'non-nullable' language feature to be enabled.   
C:\src\flutter\bin\cache\pkg\sky_engine\lib\ui\channel_buffers.dart:132:37 - This requires the 'non-nullable' language feature to be enabled.   
C:\src\flutter\bin\cache\pkg\sky_engine\lib\ui\channel_buffers.dart:19:11 - This requires the 'non-nullable' language feature to be enabled.    
C:\src\flutter\bin\cache\pkg\sky_engine\lib\ui\channel_buffers.dart:159:38 - This requires the 'non-nullable' language feature to be enabled.   
C:\src\flutter\bin\cache\pkg\sky_engine\lib\ui\channel_buffers.dart:168:32 - This requires the 'non-nullable' language feature to be enabled.   
C:\src\flutter\bin\cache\pkg\sky_engine\lib\ui\channel_buffers.dart:47:14 - This requires the 'non-nullable' language feature to be enabled.    
[INFO] 2.9s elapsed, 1/17 actions completed.
[INFO] 4.0s elapsed, 1/17 actions completed.
[INFO] 5.1s elapsed, 1/17 actions completed.
[INFO] 6.2s elapsed, 1/17 actions completed.
[INFO] 7.3s elapsed, 1/17 actions completed.
[INFO] 8.4s elapsed, 1/17 actions completed.
[INFO] 9.5s elapsed, 1/17 actions completed.
[INFO] 10.6s elapsed, 1/17 actions completed.
[INFO] 11.7s elapsed, 1/17 actions completed.
[INFO] 12.8s elapsed, 1/17 actions completed.
[INFO] 13.8s elapsed, 1/17 actions completed.
[INFO] 14.9s elapsed, 1/17 actions completed.
[INFO] 15.9s elapsed, 1/17 actions completed.
[WARNING] No actions completed for 15.1s, waiting on:
  - mobx_codegen:mobx_generator on lib/app/app_module.dart
  - mobx_codegen:mobx_generator on lib/app/app_widget.dart
  - mobx_codegen:mobx_generator on lib/app/modules/custom_dio/custom_dio.dart
  - mobx_codegen:mobx_generator on lib/app/modules/custom_dio/interceptors.dart
  - mobx_codegen:mobx_generator on lib/app/modules/home/home_controller.dart
  .. and 11 more

Alguém sabe me explicar como resolvo?

Bwolf

Mano isso é um problema dos packages, coloca eles nessas versoes:

dev_dependencies:
  flutter_test:
    sdk: flutter
  build_runner: 1.10.2
  flutter_launcher_icons: ^0.7.5
  mobx_codegen: ^1.1.0+2
  mockito: ^4.1.1
  modular_codegen: ^2.0.0+1
  pedantic: ^1.8.0

Depois roda um: flutter pub upgrade

Neo

tá usando com qual versão do flutter? estava na 1.22.4 e tinha dado esse problema com essas versões:

ependencies:
  rive: ^0.6.3
  dio: ^3.0.10
  flutter_mobx: ^1.1.0+2
  mobx: ^1.2.1+4
  flutter_modular: ^2.0.1
  flutter:
    sdk: flutter

  # The following adds the Cupertino Icons font to your application.
  # Use with the CupertinoIcons class for iOS style icons.

dev_dependencies:
  modular_codegen: ^2.0.1
  mobx_codegen: ^1.1.2
  build_runner: ^1.10.4
  flutter_test:
    sdk: flutter

fiz o downgrade para o flutter 1.22.2 e voltou a funcionar.
sabe dizer se vai funcionar com a 1.22.4 com as versões dos packages que vc indicou?