Unhandled exception: type 'Null' is not a subtype of type 'String' in type cast

[dumabg]

Unhandled exception:
type 'Null' is not a subtype of type 'String' in type cast
#0 new CachedPackage.fromJson (file:///home/xxx/snap/flutter/common/flutter/.pub-cache/hosted/pub.dartlang.org/license_generator-1.0.3/bin/src/model/dto/config/cached_package.dart:26:38)
#1 new PackageConfig.fromJson. (file:///home/xxx/snap/flutter/common/flutter/.pub-cache/hosted/pub.dartlang.org/license_generator-1.0.3/bin/src/model/dto/config/package_config.dart:16:45)
#2 MappedListIterable.elementAt (dart:_internal/iterable.dart:413:31)
#3 ListIterator.moveNext (dart:_internal/iterable.dart:342:26)
#4 new _GrowableList._ofEfficientLengthIterable (dart:core-patch/growable_array.dart:189:27)
#5 new _GrowableList.of (dart:core-patch/growable_array.dart:150:28)
#6 new List.of (dart:core-patch/array_patch.dart:51:28)
#7 ListIterable.toList (dart:_internal/iterable.dart:213:44)
#8 new PackageConfig.fromJson (file:///home/xxx/snap/flutter/common/flutter/.pub-cache/hosted/pub.dartlang.org/license_generator-1.0.3/bin/src/model/dto/config/package_config.dart:17:12)
#9 ConfigService.getConfigData (file:///home/xxx/snap/flutter/common/flutter/.pub-cache/hosted/pub.dartlang.org/license_generator-1.0.3/bin/src/service/config_service.dart:31:41)
#10 LicenseRepository.getLicenseDataForDependency (file:///home/xxx/snap/flutter/common/flutter/.pub-cache/hosted/pub.dartlang.org/license_generator-1.0.3/bin/src/repo/license_repository.dart:58:32)

#11 GenerateCommand._getDependencyText (file:///home/xxx/snap/flutter/common/flutter/.pub-cache/hosted/pub.dartlang.org/license_generator-1.0.3/bin/src/command/generate_command.dart:101:25)

#12 GenerateCommand.generateLicenses (file:///home/xxx/snap/flutter/common/flutter/.pub-cache/hosted/pub.dartlang.org/license_generator-1.0.3/bin/src/command/generate_command.dart:87:13)

#13 LicenseGenerator.run (file:///home/xxx/snap/flutter/common/flutter/.pub-cache/hosted/pub.dartlang.org/license_generator-1.0.3/bin/src/license_generator.dart:84:9)

#14 main (file:///home/xxx/snap/flutter/common/flutter/.pub-cache/hosted/pub.dartlang.org/license_generator-1.0.3/bin/license_generator.dart:10:5)

pub finished with exit code 255

[vanlooverenkoen]

Is it possible to create a small reproducible project.

[dumabg]

I remember that It works ok on my project with Flutter 2.x. Now when I trying again, it appears this error, but now I'd migrated to Flutter 3.0.5. I don't known if is a problem with a Flutter version.

[vanlooverenkoen]

Hmm we are using flutter 3.x on all our projects without issues. It is linked to a package that can not be fully parsed. Can you share your pubspec & pubspec.lock?

[dumabg]

`
name: < PROJECT >
description: < PROJECT >
publish_to: "none"
version: 2.1.2+16

environment:
sdk: ">=2.17.1 <3.0.0"
flutter: ">=1.17.0"

dependencies:
dart_utils:
git:
url: https://gitlab+deploy-token-< TOKEN >@gitlab.com/< PROJECT >/lib-dart-dart_utils
flutter_utils:
git:
url: https://gitlab+deploy-token-< TOKEN >@gitlab.com/< PROJECT >/lib-flutter-flutter_utils
messaging_service:
git:
url: https://github.com/dumabg/messaging_service.git
bubble: ^1.2.1
country_picker: ^2.0.15
crypto: ^3.0.2
device_info_plus: ^4.0.0
extended_masked_text: ^2.3.1
firebase_analytics: ^9.1.8
firebase_auth: ^3.3.18
firebase_core: ^1.17.0
firebase_crashlytics: ^2.8.0
firebase_dynamic_links: ^4.2.4
#firebase_performance: ^0.8.0+5
firebase_storage: ^10.2.16
flutter:
sdk: flutter
flutter_colorful_tab: ^0.1.0
flutter_localizations:
sdk: flutter
flutter_svg: ^1.0.3
form_field_validator: ^1.1.0
google_api_availability: ^3.0.1
google_sign_in: ^5.3.1
http: ^0.13.4
intl: ^0.17.0
maps_launcher: ^2.0.1
package_info_plus: ^1.4.2
protobuf: ^2.0.1
select_form_field: ^2.2.0
share_plus: ^4.0.4
sign_in_with_apple: ^4.0.0
transparent_image: ^2.0.0
url_launcher: ^6.1.2
whatsapp_unilink: ^2.0.1+1
flutter_keyboard_visibility: ^5.2.0
firebase_messaging: ^11.4.0
badges: ^2.0.2
youtube_player_flutter: ^8.1.0

dev_dependencies:
flutter_launcher_icons: ^0.9.2
flutter_lints: ^2.0.1
flutter_test:
sdk: flutter
license_generator: ^1.0.3
mock_http:
git:
url: https://github.com/dumabg/mock_http.git

license_generator:
fail_fast: false

flutter_gen:
integrations:
flutter_svg: true
null_safety: true

flutter_native_splash:
color: "#ffffff"
image: assets/images/splash.jpg
fullscreen: true

flutter_icons:
image_path_android: "assets/images/icon-xxxhdpi.png"
image_path_ios: "assets/images/icon-xxxhdpi-ios.png"
android: true
ios: true
remove_alpha_ios: true

flutter:
generate: true
uses-material-design: true
assets:
- assets/images/
- assets/images/logo/
- assets/images/screen/login/
- assets/images/screen/payment/
fonts:
- family: AppIcons
fonts:
- asset: fonts/AppIcons.ttf

`

[rwillemsandroid]

Unable to reproduce so far.
Had to remove the two gitlab and Github dependencies in order to successfully run pub get with the provided pubspec.
Adding a random Gitlab hosted dependency did not cause any errors either at my side.

@dumabg Can you confirm that both private repositories are property setup with a version and LICENSE ? What OS are you using?

Please provide us with a minimum public accessible example to continue investigating this issue.

[mgwrd]

I'm having the same issue, here is a example to reproduce the error: https://github.com/mgwrd/license_generator_error
So far I did not try to remove dependencies to isolate the error, but maybe someone can debug the license generator.