Locale null countryCode in flutter internationalization

[pq]

From @MarkBriggs2 on April 17, 2018 14:40

Question about #internationalization
Working through the tutorial at https://flutter.io/tutorials/internationalization/

Source at:
https://github.com/flutter/website/tree/master/_includes/code/internationalization/intl/

If supportedLocales parameter to MaterialApp constructor is as follows:

supportedLocales: [
    const Locale('en', 'US'), 
    const Locale('es', 'ES'), 
  ],

this initially works. If country codes are omitted:

supportedLocales: [
    const Locale('en'), 
    const Locale('es'), 
  ],

then the countryCode getter of the Locale object passed to DemoLocalizations.load() or GlobalMaterializations._computeLocaleName(Locale locale) (material_localizations.dart line 134) will be null so any attempt to access locale.countryCode.isEmpty will generate a NoSuchMethodError.
Is this as intended?
Thanks

Copied from original issue: flutter/flutter-intellij#2093

[MarkBriggs2]

Locale constructor is:

const Locale(this._languageCode, [ this._countryCode ]) : assert(_languageCode != null);

If altering member _countryCode to default to empty string is not recommended, then perhaps the solution may be to alter GlobalMaterializations._computeLocaleName(Locale locale) (from material_localizations.dart) to check for null. Then modify the tutorial so that the app specific localization instance's load() does the same.
Just a suggestion...:)

[hyochan]

I am facing below error in real device. don't know why.

Xcode build done.
Installing and launching...
Traceback (most recent call last):
  File "<input>", line 1, in <module>
  File "/usr/local/Cellar/python@2/2.7.14_3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/copy.py", line 52, in <module>
    import weakref
  File "/usr/local/Cellar/python@2/2.7.14_3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/weakref.py", line 14, in <module>
    from _weakref import (
ImportError: cannot import name _remove_dead_weakref
flutter: locale: en_US
flutter: locale: ko_KR
Syncing files to device 장효찬의 iPhone...
flutter: Load en
[VERBOSE-2:dart_error.cc(16)] Unhandled exception:

[cbracken]

@dooboolab do you mean the Python error? If so, I believe that should be fixed via #19281. It should make it to the next beta release. You can verify that on dev channel via flutter channel dev (flutter channel beta to switch back to beta channel).

If you mean the unhandled exception below that, it looks like the exception and any stack trace were truncated from your post. If you're still seeing this, would you mind opening a new bug with a verbose log (flutter --verbose run ...)?

[github-actions]

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