ffi error with Dart 3

[jodinathan]

when trying to run a console app:

posix-4.1.0/lib/src/pwd.dart:322:35: Error: Field 'name' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external ffi.Pointer<ffi.Int8>? name;

dart version
Dart SDK version: 3.0.0-263.0.dev (dev) (Tue Feb 21 17:59:38 2023 -0800) on "macos_x64"

[nikage]

I'm encountering the same issue with compilation error when running $ pub global activate get_cli. The error message is as follows:

../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/string/string.dart:885:35: Error: Field '_unique___names_item_12' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external ffi.Pointer<ffi.Int8>? _unique___names_item_12;

$ flutter --version
Flutter 3.9.0-0.2.pre • channel beta • https://github.com/flutter/flutter.git
Framework • revision 0df8557c56 (9 days ago) • 2023-03-23 22:02:01 -0500
Engine • revision 1cc4b2d280
Tools • Dart 3.0.0 (build 3.0.0-290.3.beta) • DevTools 2.22.2

I use MBP m1

$ sw_vers
ProductName:	macOS
ProductVersion:	12.6
BuildVersion:	21G115

Full error log

Failed to build get_cli:get:
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/pwd.dart:322:35: Error: Field 'name' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external ffi.Pointer<ffi.Int8>? name;
                                  ^
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/pwd.dart:326:35: Error: Field 'password' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external ffi.Pointer<ffi.Int8>? password;
                                  ^
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/pwd.dart:330:17: Error: Field 'uid' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external int? uid;
                ^
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/pwd.dart:334:17: Error: Field 'gid' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external int? gid;
                ^
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/pwd.dart:337:35: Error: Field 'gecos' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external ffi.Pointer<ffi.Int8>? gecos;
                                  ^
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/pwd.dart:340:35: Error: Field 'dir' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external ffi.Pointer<ffi.Int8>? dir;
                                  ^
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/pwd.dart:343:35: Error: Field 'shell' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external ffi.Pointer<ffi.Int8>? shell;
                                  ^
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/grp.dart:369:35: Error: Field 'name' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external ffi.Pointer<ffi.Int8>? name;
                                  ^
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/grp.dart:372:35: Error: Field 'passwd' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external ffi.Pointer<ffi.Int8>? passwd;
                                  ^
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/grp.dart:376:17: Error: Field 'gid' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external int? gid;
                ^
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/grp.dart:379:48: Error: Field 'mem' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external ffi.Pointer<ffi.Pointer<ffi.Int8>>? mem;
                                               ^
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/string/string.dart:830:38: Error: Field '_unique___locales_item_0' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external ffi.Pointer<locale_data>? _unique___locales_item_0;
                                     ^
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/string/string.dart:832:38: Error: Field '_unique___locales_item_1' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external ffi.Pointer<locale_data>? _unique___locales_item_1;
                                     ^
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/string/string.dart:834:38: Error: Field '_unique___locales_item_2' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external ffi.Pointer<locale_data>? _unique___locales_item_2;
                                     ^
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/string/string.dart:836:38: Error: Field '_unique___locales_item_3' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external ffi.Pointer<locale_data>? _unique___locales_item_3;
                                     ^
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/string/string.dart:838:38: Error: Field '_unique___locales_item_4' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external ffi.Pointer<locale_data>? _unique___locales_item_4;
                                     ^
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/string/string.dart:840:38: Error: Field '_unique___locales_item_5' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external ffi.Pointer<locale_data>? _unique___locales_item_5;
                                     ^
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/string/string.dart:842:38: Error: Field '_unique___locales_item_6' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external ffi.Pointer<locale_data>? _unique___locales_item_6;
                                     ^
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/string/string.dart:844:38: Error: Field '_unique___locales_item_7' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external ffi.Pointer<locale_data>? _unique___locales_item_7;
                                     ^
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/string/string.dart:846:38: Error: Field '_unique___locales_item_8' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external ffi.Pointer<locale_data>? _unique___locales_item_8;
                                     ^
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/string/string.dart:848:38: Error: Field '_unique___locales_item_9' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external ffi.Pointer<locale_data>? _unique___locales_item_9;
                                     ^
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/string/string.dart:850:38: Error: Field '_unique___locales_item_10' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external ffi.Pointer<locale_data>? _unique___locales_item_10;
                                     ^
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/string/string.dart:852:38: Error: Field '_unique___locales_item_11' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external ffi.Pointer<locale_data>? _unique___locales_item_11;
                                     ^
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/string/string.dart:854:38: Error: Field '_unique___locales_item_12' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external ffi.Pointer<locale_data>? _unique___locales_item_12;
                                     ^
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/string/string.dart:861:35: Error: Field '_unique___names_item_0' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external ffi.Pointer<ffi.Int8>? _unique___names_item_0;
                                  ^
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/string/string.dart:863:35: Error: Field '_unique___names_item_1' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external ffi.Pointer<ffi.Int8>? _unique___names_item_1;
                                  ^
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/string/string.dart:865:35: Error: Field '_unique___names_item_2' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external ffi.Pointer<ffi.Int8>? _unique___names_item_2;
                                  ^
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/string/string.dart:867:35: Error: Field '_unique___names_item_3' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external ffi.Pointer<ffi.Int8>? _unique___names_item_3;
                                  ^
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/string/string.dart:869:35: Error: Field '_unique___names_item_4' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external ffi.Pointer<ffi.Int8>? _unique___names_item_4;
                                  ^
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/string/string.dart:871:35: Error: Field '_unique___names_item_5' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external ffi.Pointer<ffi.Int8>? _unique___names_item_5;
                                  ^
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/string/string.dart:873:35: Error: Field '_unique___names_item_6' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external ffi.Pointer<ffi.Int8>? _unique___names_item_6;
                                  ^
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/string/string.dart:875:35: Error: Field '_unique___names_item_7' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external ffi.Pointer<ffi.Int8>? _unique___names_item_7;
                                  ^
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/string/string.dart:877:35: Error: Field '_unique___names_item_8' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external ffi.Pointer<ffi.Int8>? _unique___names_item_8;
                                  ^
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/string/string.dart:879:35: Error: Field '_unique___names_item_9' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external ffi.Pointer<ffi.Int8>? _unique___names_item_9;
                                  ^
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/string/string.dart:881:35: Error: Field '_unique___names_item_10' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external ffi.Pointer<ffi.Int8>? _unique___names_item_10;
                                  ^
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/string/string.dart:883:35: Error: Field '_unique___names_item_11' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external ffi.Pointer<ffi.Int8>? _unique___names_item_11;
                                  ^
../.pub-cache/hosted/pub.dev/posix-4.1.0/lib/src/string/string.dart:885:35: Error: Field '_unique___names_item_12' cannot be nullable or have type 'Null', it must be `int`, `double`, `Pointer`, or a subtype of `Struct` or `Union`.
  external ffi.Pointer<ffi.Int8>? _unique___names_item_12;

[shamblett]

I'm seeing these errors also, +1

[Skycoder42]

The 4.2.0 tag seems to work when directly referencing it as git tag. Why has it not been released on pub.dev yet?

[bsutton]

So the problem was layered

1. I had a circular dependency issue with dcli.
   So I started on breaking dcli into multiple smaller package to remove this sort of problem.
2. my laptop died so my evening work on dcli halted until I came to the realization that I need to buy a new
   laptop as my old one wasn't retrievable.
3. By the time I got the new lap top I got distracted by the dcli work and completely forgot that I hadn't released this version.

:<

[bsutton]

I will try to get a release happening over the weekend.

[shamblett]

Great, thanks

[bsutton]

dart_posix 5.0.0 has now being published.
This appears to resolve the problem.

Please take it for a spin and let me know how it goes.

[Skycoder42]

Works for me, thank you :)

[shamblett]

And me, thanks