Exception thrown by the migration tool

[mjimaz]

Please include the SDK version (2.19.473941130-edge+google3-v2) 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 591 in /google/src/cloud/mjimaz/dart_migration/google3/blaze-bin/ads/awapps2/video/simple/construction/language_selector/testing/lib/language_selector_po.g.dart (PageLoaderElement $root)

#0 EdgeBuilder._handleFieldOverriddenDeclaration (package:nnbd_migration/src/edge_builder.dart:2854:63)
#1 EdgeBuilder.visitVariableDeclarationList (package:nnbd_migration/src/edge_builder.dart:2030:11)
#2 VariableDeclarationListImpl.accept (package:analyzer/src/dart/ast/ast.dart:13160:15)
#3 EdgeBuilder._dispatch (package:nnbd_migration/src/edge_builder.dart:2363:24)
#4 EdgeBuilder.visitNode (package:nnbd_migration/src/edge_builder.dart:1555:9)
#5 GeneralizingAstVisitor.visitAnnotatedNode (package:analyzer/dart/ast/visitor.dart:135:48)
#6 GeneralizingAstVisitor.visitDeclaration (package:analyzer/dart/ast/visitor.dart:251:44)
#7 GeneralizingAstVisitor.visitClassMember (package:analyzer/dart/ast/visitor.dart:197:44)
#8 GeneralizingAstVisitor.visitFieldDeclaration (package:analyzer/dart/ast/visitor.dart:318:54)
#9 FieldDeclarationImpl.accept (package:analyzer/src/dart/ast/ast.dart:4697:50)
#10 EdgeBuilder._dispatch (package:nnbd_migration/src/edge_builder.dart:2363:24)
#11 EdgeBuilder._dispatchList (package:nnbd_migration/src/edge_builder.dart:2381:7)
#12 EdgeBuilder.visitClassOrMixinOrExtensionDeclaration (package:nnbd_migration/src/edge_builder.dart:705:7)
#13 EdgeBuilder.visitClassDeclaration (package:nnbd_migration/src/edge_builder.dart:663:5)
#14 ClassDeclarationImpl.accept (package:analyzer/src/dart/ast/ast.dart:1888:50)
#15 EdgeBuilder._dispatch (package:nnbd_migration/src/edge_builder.dart:2363:24)
#16 EdgeBuilder.visitNode (package:nnbd_migration/src/edge_builder.dart:1555:9)
#17 GeneralizingAstVisitor.visitCompilationUnit (package:analyzer/dart/ast/visitor.dart:213:52)
#18 CompletenessTracker.visitCompilationUnit. (package:nnbd_migration/src/utilities/completeness_tracker.dart:52:24)
#19 PermissiveModeVisitor.reportExceptionsIfPermissive (package:nnbd_migration/src/utilities/permissive_mode.dart:26:24)
#20 CompletenessTracker.visitCompilationUnit (package:nnbd_migration/src/utilities/completeness_tracker.dart:43:5)
#21 CompilationUnitImpl.accept (package:analyzer/src/dart/ast/ast.dart:2396:50)
#22 NullabilityMigrationImpl.processInput (package:nnbd_migration/src/nullability_migration_impl.dart:223:12)
#23 NonNullableFix.processUnit (package:nnbd_migration/src/front_end/non_nullable_fix.dart:162:16)
#24 _FixCodeProcessor.runLaterPhases. (package:nnbd_migration/migration_cli.dart:1088:19)
#25 _FixCodeProcessor.processResources (package:nnbd_migration/migration_cli.dart:1020:26)

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

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

#28 startMigrationTool (package:dart.null_safety.migration/src/migration_runner.dart:416:5)

#29 main (package:dart.null_safety.migration/migration.dart:70:3)

#30 main (google3:///dart/null_safety/migration/bin/migration.dart:7:5)

Unhandled error: Instance of 'MigrationExit'
#0 MigrationCliRunner.onException (package:nnbd_migration/migration_cli.dart:583:9)
#1 NullabilityMigrationAdapter.reportException (package:nnbd_migration/src/front_end/non_nullable_fix.dart:549:21)
#2 PermissiveModeVisitor.reportExceptionsIfPermissive (package:nnbd_migration/src/utilities/permissive_mode.dart:28:19)
#3 CompletenessTracker.visitCompilationUnit (package:nnbd_migration/src/utilities/completeness_tracker.dart:43:5)
#4 CompilationUnitImpl.accept (package:analyzer/src/dart/ast/ast.dart:2396:50)
#5 NullabilityMigrationImpl.processInput (package:nnbd_migration/src/nullability_migration_impl.dart:223:12)
#6 NonNullableFix.processUnit (package:nnbd_migration/src/front_end/non_nullable_fix.dart:162:16)
#7 _FixCodeProcessor.runLaterPhases. (package:nnbd_migration/migration_cli.dart:1088:19)
#8 _FixCodeProcessor.processResources (package:nnbd_migration/migration_cli.dart:1020:26)

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

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

#11 startMigrationTool (package:dart.null_safety.migration/src/migration_runner.dart:416:5)

#12 main (package:dart.null_safety.migration/migration.dart:70:3)

#13 main (google3:///dart/null_safety/migration/bin/migration.dart:7:5)

[yanok]

@mjimaz I believe I've fixed this one, could you please verify?

[stereotype441]

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.