Flutter Freezed Expected to find ')'

Question

After upgrading my Flutter, Freezed appears to generate files that have errors in them for my Bloc/Cubit files.

Pubspec.yaml has all the latest versions for the packages.

part of 'test_cubit.dart';

@freezed
abstract class TestState with _$TestState {
  const factory TestState.initial() = _Initial;
  const factory TestState.loaded(String someValue) = _Loaded;
}

Would be generated as (only excerpt where error occurs)

/// @nodoc
class _$TestStateTearOff {
  const _$TestStateTearOff();

_Initial initial() {
  return const  _Initial();
}
_Loaded loaded( String* someValue) {
  return  _Loaded(someValue,);
}

}

Image of the errors

When I delete the * it all works just fine. Can anyone shed some light on this please?

@AntoninGAVREL Is it an issue or is it something that I am doing wrong somewhere? — Pieter, Mar 24 '21 at 15:17
you are doing the right thing, but `Freezed` does not seem to be doing it right. — Antonin GAVREL, Mar 24 '21 at 15:50
Have you updated freezed packages and build runner as well in pubspec? — rkdupr0n, Apr 02 '21 at 13:51
The latest freezed package recommends we don't need abstract classes. https://github.com/rrousselGit/freezed/tree/master/packages/freezed#the-abstract-keyword Maybe that's the issue? — rkdupr0n, Apr 03 '21 at 06:38
@rkdupr0n No, that makes no difference. I will put the answer below - forgot about this question in all the madness. — Pieter, Apr 03 '21 at 10:38

score 1 · Accepted Answer · answered Apr 03 '21 at 10:46

This was answered on GitHub in the end. The issue was identified after running a check to ensure the the application was fully migrated to null-safety.

$ dart pub upgrade --null-safety
null-safety compatible versions do not exist for:
 - build_runner

When running flutter pub run build_runner build it yielded an error

Error: Cannot run with sound null safety, because the following dependencies don't support null safety:

 - package:build_runner_core
 - package:build_runner
 - package:build_config
 - package:build_daemon
 - package:code_builder

After editing the pubspec.yaml and setting a higher environment it worked. This was not automatically done as part of the upgrade (or new applications).

environment:
  sdk: ">=2.12.0-0 <3.0.0"

Ahh... Weird. I never had to run that command. I just changed my sdk version and it worked for me. — rkdupr0n, Apr 03 '21 at 11:30
@rkdupr0n I missed updating my SDK in the yaml file (I presumed it was changed as part of the upgrade) and those commands pointed at what was causing the issue. — Pieter, Apr 03 '21 at 14:58

Flutter Freezed Expected to find ')'

1 Answers1