Error in converting to apk

[Akul2010]

When I tried converting the code to an .apk file, it wouldn't work. Instead, it showed this:

PS C:\Users\materialsworld\Desktop\passwd-develop>   flutter build apk --target-platform android-arm --split-per-abi --obfuscate --split-debug-info=./debugInfo/apk

Building without sound null safety
For more information see https://dart.dev/null-safety/unsound-null-safety

/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/pinenacl-0.1.3/lib/src/api/base.dart:22:7: Error: 'Uint8List' is restricted and can't be extended or implemented.
class ByteList with ListMixin<int>, Encodable implements Uint8List {
      ^
.dart_tool/flutter_build/generated_main.dart:26:9: Error: Undefined name 'Win32BiometricStoragePlugin'.
        Win32BiometricStoragePlugin.registerWith();
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/biometric_storage-1.1.0+1/lib/src/biometric_storage_win32.dart:108:43: Error: The getter 'addressOf' isn't defined for the class 'CREDENTIAL'.
 - 'CREDENTIAL' is from 'package:win32/src/structs.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
      final result = CredWrite(credential.addressOf, 0);
                                          ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/biometric_storage-1.1.0+1/lib/src/biometric_storage_win32.dart:117:23: Error: The getter 'addressOf' isn't defined for the class 'CREDENTIAL'.
 - 'CREDENTIAL' is from 'package:win32/src/structs.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
      free(credential.addressOf);
                      ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/ffi-0.1.3/lib/src/utf8.dart:63:33: Error: The getter 'addressOf' isn't defined for the class 'Utf8'.
 - 'Utf8' is from 'package:ffi/src/utf8.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/ffi-0.1.3/lib/src/utf8.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
  String toString() => fromUtf8(addressOf);
                                ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart:1039:7: Error: The getter 'addressOf' isn't defined for the class 'LOGFONT'.
 - 'LOGFONT' is from 'package:win32/src/structs.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
      addressOf.cast<Uint8>().elementAt(28).cast<Utf16>();
      ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart:1084:29: Error: The getter 'addressOf' isn't defined for the class 'ENUMLOGFONTEX'.
 - 'ENUMLOGFONTEX' is from 'package:win32/src/structs.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
  LOGFONT get elfLogFont => addressOf.cast<LOGFONT>().ref;
                            ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart:1086:29: Error: The getter 'addressOf' isn't defined for the class 'ENUMLOGFONTEX'.
 - 'ENUMLOGFONTEX' is from 'package:win32/src/structs.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
  String get elfFullName => addressOf
                            ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart:1092:26: Error: The getter 'addressOf' isn't defined for the class 'ENUMLOGFONTEX'.
 - 'ENUMLOGFONTEX' is from 'package:win32/src/structs.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
  String get elfStyle => addressOf
                         ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart:1098:27: Error: The getter 'addressOf' isn't defined for the class 'ENUMLOGFONTEX'.
 - 'ENUMLOGFONTEX' is from 'package:win32/src/structs.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
  String get elfScript => addressOf
                          ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart:2660:7: Error: The getter 'addressOf' isn't defined for the class 'OSVERSIONINFO'.
 - 'OSVERSIONINFO' is from 'package:win32/src/structs.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
      addressOf.cast<Uint8>().elementAt(20).cast<Utf16>().unpackString(128);
      ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart:2671:11: Error: The getter 'addressOf' isn't defined for the class 'OSVERSIONINFO'.
 - 'OSVERSIONINFO' is from 'package:win32/src/structs.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
        ..addressOf.cast<Uint8>().elementAt(20).value = 0;
          ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart:2716:24: Error: The getter 'addressOf' isn't defined for the class 'BLUETOOTH_DEVICE_INFO'.
 - 'BLUETOOTH_DEVICE_INFO' is from 'package:win32/src/structs.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
  String get szName => addressOf
                       ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart:2809:7: Error: The getter 'addressOf' isn't defined for the class 'BLUETOOTH_PIN_INFO'.
 - 'BLUETOOTH_PIN_INFO' is from 'package:win32/src/structs.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
      addressOf.cast<Uint8>().elementAt(BTH_MAX_PIN_SIZE).value;
      ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart:2812:5: Error: The getter 'addressOf' isn't defined for the class 'BLUETOOTH_PIN_INFO'.
 - 'BLUETOOTH_PIN_INFO' is from 'package:win32/src/structs.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
    addressOf.cast<Uint8>().elementAt(BTH_MAX_PIN_SIZE).value =
    ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart:2817:28: Error: The getter 'addressOf' isn't defined for the class 'BLUETOOTH_PIN_INFO'.
 - 'BLUETOOTH_PIN_INFO' is from 'package:win32/src/structs.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
      String.fromCharCodes(addressOf.cast<Uint8>().asTypedList(pinLength));
                           ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart:2825:7: Error: The getter 'addressOf' isn't defined for the class 'BLUETOOTH_PIN_INFO'.
 - 'BLUETOOTH_PIN_INFO' is from 'package:win32/src/structs.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
      addressOf.cast<Uint8>().elementAt(idx).value = pinData[idx];
      ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/com/combase.dart:38:31: Error: The getter 'addressOf' isn't defined for the class 'GUID'.
 - 'GUID' is from 'package:win32/src/structs.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
  final iid = GUID.allocate().addressOf;
                              ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/com/combase.dart:56:33: Error: The getter 'addressOf' isn't defined for the class 'GUID'.
 - 'GUID' is from 'package:win32/src/structs.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
  final clsid = GUID.allocate().addressOf;
                                ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/winrt/winrt_helpers.dart:86:40: Error: The getter 'addressOf' isn't defined for the class 'GUID'.
 - 'GUID' is from 'package:win32/src/structs.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
  final riidCalendar = GUID.allocate().addressOf;
                                       ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/generated/IDesktopWallpaper.dart:197:38: Error: The getter 'addressOf' isn't defined for the class 'COMObject'.
 - 'COMObject' is from 'package:win32/src/com/combase.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/com/combase.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
    final ptr = COMObject.allocate().addressOf;
                                     ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/generated/IDesktopWallpaper.dart:200:49: Error: The getter 'addressOf' isn't defined for the class 'GUID'.
 - 'GUID' is from 'package:win32/src/structs.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
        GUID.fromString(CLSID_DesktopWallpaper).addressOf,
                                                ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/generated/IDesktopWallpaper.dart:203:48: Error: The getter 'addressOf' isn't defined for the class 'GUID'.
 - 'GUID' is from 'package:win32/src/structs.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
        GUID.fromString(IID_IDesktopWallpaper).addressOf,
                                               ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/generated/IFileOpenDialog.dart:58:38: Error: The getter 'addressOf' isn't defined for the class 'COMObject'.
 - 'COMObject' is from 'package:win32/src/com/combase.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/com/combase.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
    final ptr = COMObject.allocate().addressOf;
                                     ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/generated/IFileOpenDialog.dart:61:47: Error: The getter 'addressOf' isn't defined for the class 'GUID'.
 - 'GUID' is from 'package:win32/src/structs.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
        GUID.fromString(CLSID_FileOpenDialog).addressOf,
                                              ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/generated/IFileOpenDialog.dart:64:46: Error: The getter 'addressOf' isn't defined for the class 'GUID'.
 - 'GUID' is from 'package:win32/src/structs.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
        GUID.fromString(IID_IFileOpenDialog).addressOf,
                                             ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/generated/IFileSaveDialog.dart:99:38: Error: The getter 'addressOf' isn't defined for the class 'COMObject'.
 - 'COMObject' is from 'package:win32/src/com/combase.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/com/combase.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
    final ptr = COMObject.allocate().addressOf;
                                     ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/generated/IFileSaveDialog.dart:102:47: Error: The getter 'addressOf' isn't defined for the class 'GUID'.
 - 'GUID' is from 'package:win32/src/structs.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
        GUID.fromString(CLSID_FileSaveDialog).addressOf,
                                              ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/generated/IFileSaveDialog.dart:105:46: Error: The getter 'addressOf' isn't defined for the class 'GUID'.
 - 'GUID' is from 'package:win32/src/structs.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
        GUID.fromString(IID_IFileSaveDialog).addressOf,
                                             ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/generated/IKnownFolderManager.dart:164:38: Error: The getter 'addressOf' isn't defined for the class 'COMObject'.
 - 'COMObject' is from 'package:win32/src/com/combase.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/com/combase.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
    final ptr = COMObject.allocate().addressOf;
                                     ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/generated/IKnownFolderManager.dart:167:51: Error: The getter 'addressOf' isn't defined for the class 'GUID'.
 - 'GUID' is from 'package:win32/src/structs.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
        GUID.fromString(CLSID_KnownFolderManager).addressOf,
                                                  ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/generated/IKnownFolderManager.dart:170:50: Error: The getter 'addressOf' isn't defined for the class 'GUID'.
 - 'GUID' is from 'package:win32/src/structs.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
        GUID.fromString(IID_IKnownFolderManager).addressOf,
                                                 ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/generated/INetworkListManager.dart:128:38: Error: The getter 'addressOf' isn't defined for the class 'COMObject'.
 - 'COMObject' is from 'package:win32/src/com/combase.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/com/combase.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
    final ptr = COMObject.allocate().addressOf;
                                     ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/generated/INetworkListManager.dart:131:51: Error: The getter 'addressOf' isn't defined for the class 'GUID'.
 - 'GUID' is from 'package:win32/src/structs.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
        GUID.fromString(CLSID_NetworkListManager).addressOf,
                                                  ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/generated/INetworkListManager.dart:134:50: Error: The getter 'addressOf' isn't defined for the class 'GUID'.
 - 'GUID' is from 'package:win32/src/structs.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
        GUID.fromString(IID_INetworkListManager).addressOf,
                                                 ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/generated/IWbemLocator.dart:82:38: Error: The getter 'addressOf' isn't defined for the class 'COMObject'.
 - 'COMObject' is from 'package:win32/src/com/combase.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/com/combase.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
    final ptr = COMObject.allocate().addressOf;
                                     ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/generated/IWbemLocator.dart:84:68: Error: The getter 'addressOf' isn't defined for the class 'GUID'.
 - 'GUID' is from 'package:win32/src/structs.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
    final hr = CoCreateInstance(GUID.fromString(CLSID_WbemLocator).addressOf,
                                                                   ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/generated/IWbemLocator.dart:85:64: Error: The getter 'addressOf' isn't defined for the class 'GUID'.
 - 'GUID' is from 'package:win32/src/structs.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
        nullptr, CLSCTX_ALL, GUID.fromString(IID_IWbemLocator).addressOf, ptr);
                                                               ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/path_provider_windows-0.0.4+1/lib/src/path_provider_windows_real.dart:126:25: Error: The getter 'addressOf' isn't defined for the class 'GUID'.
 - 'GUID' is from 'package:win32/src/structs.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
          knownFolderID.addressOf, KF_FLAG_DEFAULT, NULL, pathPtrPtr);
                        ^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/platform-3.0.0-nullsafety.4/lib/src/interface/local_platform.dart:46:19: Error: Member not found: 'packageRoot'.
      io.Platform.packageRoot; // ignore: deprecated_member_use
                  ^^^^^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart:2971:7: Error: Struct 'NLM_SIMULATED_PROFILE_INFO' is empty. Empty structs and unions are undefined behavior.
class NLM_SIMULATED_PROFILE_INFO extends Struct {}
      ^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart:2964:7: Error: Struct 'STATSTG' is empty. Empty structs and unions are undefined behavior.
      ^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart:2957:7: Error: Struct 'CLSID' is empty. Empty structs and unions are undefined behavior.
class CLSID extends Struct {}
      ^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart:2950:7: Error: Struct 'SAFEARRAY' is empty. Empty structs and unions are undefined behavior.
class SAFEARRAY extends Struct {}
      ^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart:2945:7: Error: Struct 'PROPVARIANT' is empty. Empty structs and unions are undefined behavior.
class PROPVARIANT extends Struct {}
      ^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart:2938:7: Error: Struct 'PROPERTYKEY' is empty. Empty structs and unions are undefined behavior.
class PROPERTYKEY extends Struct {}
      ^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart:2932:7: Error: Struct 'EXCEPINFO' is empty. Empty structs and unions are undefined behavior.
class EXCEPINFO extends Struct {}
      ^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart:2807:7: Error: Struct 'BLUETOOTH_PIN_INFO' is empty. Empty structs and unions are undefined behavior.
class BLUETOOTH_PIN_INFO extends Struct {
      ^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/win32-1.7.3/lib/src/structs.dart:1083:7: Error: Struct 'ENUMLOGFONTEX' is empty. Empty structs and unions are undefined behavior.
class ENUMLOGFONTEX extends Struct {
      ^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/ffi-0.1.3/lib/src/utf16.dart:16:7: Error: Struct 'Utf16' is empty. Empty structs and unions are undefined behavior.
class Utf16 extends Struct {
      ^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/ffi-0.1.3/lib/src/utf8.dart:23:7: Error: Struct 'Utf8' is empty. Empty structs and unions are undefined behavior.
class Utf8 extends Struct {
      ^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/ffi-0.1.3/lib/src/allocation.dart:47:33: Error: Expected type 'T' to be a valid and instantiated subtype of 'NativeType'.
  final int totalSize = count * sizeOf<T>();
                                ^

FAILURE: Build failed with an exception.

* Where:
Script 'C:\src\flutter\packages\flutter_tools\gradle\flutter.gradle' line: 1102

* What went wrong:
Execution failed for task ':app:compileFlutterBuildRelease'.
> Process 'command 'C:\src\flutter\bin\flutter.bat'' finished with non-zero exit value 1

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 31s
Running Gradle task 'assembleRelease'...                           32.9s
Gradle task assembleRelease failed with exit code 1

Please do help with this.

Thank you.

[gargakshit]

The app hasn't been tested with flutter 2.x and 3.x, and dart:ffi changed its API in 2.x so this is expected. Contributions to fix the same are welcome

[Akul2010]

I don't recall seeing any usage of dart:ffi in the code. Can you please specify where it is used exactly?

[ghost]

I don't recall seeing any usage of dart:ffi in the code. Can you please specify where it is used exactly?

**_/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/ffi-0.1.3/lib/src/utf8.dart:63:33: Error: The getter 'addressOf' isn't defined for the class 'Utf8'.
 - 'Utf8' is from 'package:ffi/src/utf8.dart' ('/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/ffi-0.1.3/lib/src/utf8.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'addressOf'.
  String toString() => fromUtf8(addressOf);_**

I think that @gargakshit is referring to this block of code

[gargakshit]

Might be a transitive dependency. I do not recall a direct use of dart:ffi

[mawoka-myblock]

This error occurs also while building for linux. I think that many/all dependencies should be updated, which could solve the problem and up-to-date dependencies are never bad.

[gargakshit]

These are breaking changes and upgrading would be a huge undertaking. I, unfortunately, do not have the time and energy to do that. Although you are welcome to do it and send a PR

[mawoka-myblock]

These are breaking changes and upgrading would be a huge undertaking. I, unfortunately, do not have the time and energy to do that. Although you are welcome to do it and send a PR

I've tried, but I started replacing dependency-pinns with any, but the dependency-issues kept going and going. I honestly would love to help you, but unfortunately not really with dart/flutter.

[gargakshit]

These are breaking changes and upgrading would be a huge undertaking. I, unfortunately, do not have the time and energy to do that. Although you are welcome to do it and send a PR

I've tried, but I started replacing dependency-pinns with any, but the dependency-issues kept going and going. I honestly would love to help you, but unfortunately not really with dart/flutter.

any won't work as most dependencies had a major upgrade which breaks the API

[Akul2010]

Maybe try switching dependencies? For example, we could use local_auth. I usually use that library.

[gargakshit]

Maybe try switching dependencies? For example, we could use local_auth. I usually use that library.

That would be a bigger change than upgrading the existing dependencies. Also local_auth doesn't fit the usecase.

[Mecharev16]

what version of flutter should i use in order to build this?

[Akul2010]

flutter 1.x i believe

The app hasn't been tested with flutter 2.x and 3.x