BUg in dart migration tool, version 2.19.0

[mboyanna]

Attempted to use the dart migration tool for null safety enforcement.

Generating migration suggestions...
[--------------------------------------------\ ]Aborting migration due to an exception. This most likely is due to a
bug in the migration tool. Please consider filing a bug report at:

https://github.com/dart-lang/sdk/issues/new
Please include the SDK version (2.19.0) in your bug report.

To attempt to perform migration anyway, you may re-run with
--ignore-exceptions.

Exception details:

type 'MixinElementImpl' is not a subtype of type 'ClassElement' in type cast at offset 1543 in /Users/mboyanna/Documents/fa-ver0.1-test/debate-ai/lib/views/auth/login_view.dart (@OverRide void dispose() {_signInEmailController.dispose(); _signInPasswordController.dispose(); _singInEmailFocusNode.dispose(); _signInPasswordFocusNode.dispose(); super.dispose();})

#0 EdgeBuilder._handleExecutableOverriddenDeclaration (package:nnbd_migration/src/edge_builder.dart:2774:62)
#1 EdgeBuilder._handleExecutableDeclaration (package:nnbd_migration/src/edge_builder.dart:2694:13)
#2 EdgeBuilder.visitMethodDeclaration (package:nnbd_migration/src/edge_builder.dart:1393:5)
#3 MethodDeclarationImpl.accept (package:analyzer/src/dart/ast/ast.dart:8533:50)
#4 EdgeBuilder._dispatch (package:nnbd_migration/src/edge_builder.dart:2375:24)
#5 EdgeBuilder._dispatchList (package:nnbd_migration/src/edge_builder.dart:2393:7)
#6 EdgeBuilder.visitClassOrMixinOrExtensionDeclaration (package:nnbd_migration/src/edge_builder.dart:717:7)
#7 EdgeBuilder.visitClassDeclaration (package:nnbd_migration/src/edge_builder.dart:676:5)
#8 ClassDeclarationImpl.accept (package:analyzer/src/dart/ast/ast.dart:2000:50)
#9 EdgeBuilder._dispatch (package:nnbd_migration/src/edge_builder.dart:2375:24)
#10 EdgeBuilder.visitNode (package:nnbd_migration/src/edge_builder.dart:1567:9)
#11 GeneralizingAstVisitor.visitCompilationUnit (package:analyzer/dart/ast/visitor.dart:216:52)
#12 CompletenessTracker.visitCompilationUnit. (package:nnbd_migration/src/utilities/completeness_tracker.dart:52:24)
#13 PermissiveModeVisitor.reportExceptionsIfPermissive (package:nnbd_migration/src/utilities/permissive_mode.dart:26:24)
#14 CompletenessTracker.visitCompilationUnit (package:nnbd_migration/src/utilities/completeness_tracker.dart:43:5)
#15 CompilationUnitImpl.accept (package:analyzer/src/dart/ast/ast.dart:2501:50)
#16 NullabilityMigrationImpl.processInput (package:nnbd_migration/src/nullability_migration_impl.dart:224:12)
#17 NonNullableFix.processUnit (package:nnbd_migration/src/front_end/non_nullable_fix.dart:162:16)
#18 _FixCodeProcessor.runLaterPhases. (package:nnbd_migration/migration_cli.dart:1088:19)
#19 _FixCodeProcessor.processResources (package:nnbd_migration/migration_cli.dart:1020:26)

#20 _FixCodeProcessor.runLaterPhases (package:nnbd_migration/migration_cli.dart:1086:5)

#21 MigrationCliRunner.run (package:nnbd_migration/migration_cli.dart:695:24)

#22 MigrateCommand.run (package:dartdev/src/commands/migrate.dart:37:7)

#23 CommandRunner.runCommand (package:args/command_runner.dart:212:13)

#24 DartdevRunner.runCommand (package:dartdev/dartdev.dart:241:18)

#25 runDartdev (package:dartdev/dartdev.dart:65:18)

#26 main (file:///opt/s/w/ir/x/w/sdk/pkg/dartdev/bin/dartdev.dart:11:3)

[mboyanna]

$ flutter --version
Flutter 3.7.0 • channel unknown • unknown source
Framework • revision b06b8b2710 (11 months ago) • 2023-01-23 16:55:55 -0800
Engine • revision b24591ed32
Tools • Dart 2.19.0 • DevTools 2.20.1

[lrhn]

As of 1c7fe71, the null safety migration tool has been removed from active development and retired. No further work on the tool is planned.

If you still need help, or you believe this issue has been closed in error, please feel free to reopen.