Easy_localization: Unhandled Exception: NoSuchMethodError: The getter 'languageCode' was called on null.

[zl910627]

Version: 2.2.1
Platform: Android 10 Simulator
Support locales: en, fr
Stack:

E/flutter (15334): [ERROR:flutter/lib/ui/ui_dart_state.cc(157)] Unhandled Exception: NoSuchMethodError: The getter 'languageCode' was called on null.
E/flutter (15334): Receiver: null
E/flutter (15334): Tried calling: languageCode
E/flutter (15334): #0      Object.noSuchMethod (dart:core-patch/object_patch.dart:53:5)
E/flutter (15334): #1      _EasyLocalizationState._checkInitLocale (package:easy_localization/src/easy_localization_app.dart:113:48)
E/flutter (15334): #2      _EasyLocalizationState._init.<anonymous closure> (package:easy_localization/src/easy_localization_app.dart:98:23)
E/flutter (15334): #3      ListMixin.firstWhere (dart:collection/list.dart:144:15)
E/flutter (15334): #4      _EasyLocalizationState._init (package:easy_localization/src/easy_localization_app.dart:97:40)
E/flutter (15334): <asynchronous suspension>
E/flutter (15334): #5      _EasyLocalizationState.initState (package:easy_localization/src/easy_localization_app.dart:71:5)
E/flutter (15334): #6      StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:4355:58)
E/flutter (15334): #7      ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
E/flutter (15334): #8      Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
E/flutter (15334): #9      Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
E/flutter (15334): #10     RenderObjectToWidgetElement._rebuild (package:flutter/src/widgets/binding.dart:1028:16)
E/flutter (15334): #11     RenderObjectToWidgetElement.mount (package:flutter/src/widgets/binding.dart:999:5)
E/flutter (15334): #12     RenderObjectToWidgetAdapter.attachToRenderTree.<anonymous closure> (package:flutter/src/widgets/binding.dart:942:17)
E/flutter (15334): #13     BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2412:19)
E/flutter (15334): #14     RenderObjectToWidgetAdapter.attachToRenderTree (package:flutter/src/widgets/binding.dart:941:13)
E/flutter (15334): #15     WidgetsBinding.attachRootWidget (package:flutter/src/widgets/binding.dart:819:7)
E/flutter (15334): #16     WidgetsBinding.scheduleAttachRootWidget.<anonymous closure> (package:flutter/src/widgets/binding.dart:804:7)
E/flutter (15334): #17     _rootRun (dart:async/zone.dart:1122:38)
E/flutter (15334): #18     _CustomZone.run (dart:async/zone.dart:1023:19)
E/flutter (15334): #19     _CustomZone.runGuarded (dart:async/zone.dart:925:7)
E/flutter (15334): #20     _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:965:23)
E/flutter (15334): #21     _rootRun (dart:async/zone.dart:1126:13)
E/flutter (15334): #22     _CustomZone.run (dart:async/zone.dart:1023:19)
E/flutter (15334): #23     _CustomZone.bindCallback.<anonymous closure> (dart:async/zone.dart:949:23)
E/flutter (15334): #24     Timer._createTimer.<anonymous closure> (dart:async-patch/timer_patch.dart:23:15)
E/flutter (15334): #25     _Timer._runTimers (dart:isolate-patch/timer_impl.dart:384:19)
E/flutter (15334): #26     _Timer._handleMessage (dart:isolate-patch/timer_impl.dart:418:5)
E/flutter (15334): #27     _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:174:12)

[zl910627]

If we don't set startLocale, app will meet above issue.
But if set, app will start with startLocale regardless of system locale.

[hkndzdr]

@aissat, @Overman775,
It should set the language of the system when start locale isn't set. It's unreasonable for the application to start with a default language.
Because a global application starts in the language of the person who downloaded the application.

[aissat]

It should set the language of the system when start locale isn't set. It's unreasonable for the application to start with a default language.
Because a global application starts in the language of the person who downloaded the application.

yeah, it's like what u say, start locale it for the case when deves that require setting a default locale

[hkndzdr]

It should set the language of the system when start locale isn't set. It's unreasonable for the application to start with a default language.
Because a global application starts in the language of the person who downloaded the application.

yeah, it's like what u say, start locale it for the case when deves that require setting a default locale

But, If the start locale parameter is null, the default system language should be set. The above error should be corrected.

[zl910627]

if we did not set saveLocale=false and without startLocale library crashes above.
but saveLocale=false, app will load system locale.
there are niche exception with above variables.

[Overman775]

@zl910627 please send example code for reproduce bug

[zl910627]

final locales = [
  const Locale('en'),
  const Locale('fr'),
];
runApp(EasyLocalization(
  child: MyApp(),
  saveLocale: false,
  supportedLocales: locales,
  fallbackLocale: locales[0],
  path: 'assets/langs',
));

above code will never crash.
if you comment saveLocale: false, line, you will meet crash
if no saveLocale: false, and set startLocale: locales[0],, then app will not crash

[Overman775]

@aissat @zl910627 Bug confirm. Bug only if not set countryCode like in example upper

[aissat]

@zl910627 try easy_localization: 2.2.2-dev

[Overman775]

@zl910627 please recheck develop version. Bug fixed?

[zl910627]

Let me check today.
Thank you.

[zl910627]

thank you for your support!