dart migrate crashes in visitPrefixedIdentifier on dartdoc

[jcollins-g]

• Dart SDK Version (dart --version)
  Dart SDK version: 2.15.0-203.0.dev (dev) (Mon Oct 11 01:29:51 2021 -0700) on "macos_x64"
• Whether you are using Windows, MacOSX, or Linux (if applicable)
  MacOS X
• Whether you are using Chrome, Safari, Firefox, Edge (if applicable)
  n/a

Tested at dart-lang/dartdoc@b4fa868.

jcollins-macbookpro2:dartdoc jcollins$ dart migrate .
Migrating /Users/jcollins/dart/dartdoc

See https://dart.dev/go/null-safety-migration for a migration guide.

Analyzing project...
[----------------------------------------------------------------------------------------------------------------------------------------------------------------\]No analysis issues found.

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 (2.15.0-203.0.dev) in your bug report.

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

Exception details:

Null check operator used on a null value at offset 15 in /Users/jcollins/dart/dartdoc/test/mustachio/foo.dart (Renderer.forTest)

#0      EdgeBuilder._makeEdgeOrigin (package:nnbd_migration/src/edge_builder.dart:3267:24)
#1      EdgeBuilder._checkExpressionNotNull (package:nnbd_migration/src/edge_builder.dart:2065:18)
#2      EdgeBuilder._handleTarget (package:nnbd_migration/src/edge_builder.dart:3175:14)
#3      EdgeBuilder._handlePropertyAccess (package:nnbd_migration/src/edge_builder.dart:3098:20)
#4      EdgeBuilder.visitPrefixedIdentifier (package:nnbd_migration/src/edge_builder.dart:1566:14)
#5      PrefixedIdentifierImpl.accept (package:analyzer/src/dart/ast/ast.dart:8295:50)
#6      EdgeBuilder._dispatch (package:nnbd_migration/src/edge_builder.dart:2305:24)
#7      EdgeBuilder.visitAnnotation (package:nnbd_migration/src/edge_builder.dart:390:7)
#8      AnnotationImpl.accept (package:analyzer/src/dart/ast/ast.dart:298:50)
#9      EdgeBuilder._dispatch (package:nnbd_migration/src/edge_builder.dart:2305:24)
#10     EdgeBuilder._dispatchList (package:nnbd_migration/src/edge_builder.dart:2323:7)
#11     EdgeBuilder.visitLibraryDirective (package:nnbd_migration/src/edge_builder.dart:1287:5)
#12     LibraryDirectiveImpl.accept (package:analyzer/src/dart/ast/ast.dart:6653:50)
#13     EdgeBuilder._dispatch (package:nnbd_migration/src/edge_builder.dart:2305:24)
#14     EdgeBuilder.visitNode (package:nnbd_migration/src/edge_builder.dart:1501:9)
#15     GeneralizingAstVisitor.visitCompilationUnit (package:analyzer/dart/ast/visitor.dart:202:52)
#16     CompletenessTracker.visitCompilationUnit.<anonymous closure> (package:nnbd_migration/src/utilities/completeness_tracker.dart:52:24)
#17     PermissiveModeVisitor.reportExceptionsIfPermissive (package:nnbd_migration/src/utilities/permissive_mode.dart:26:24)
#18     CompletenessTracker.visitCompilationUnit (package:nnbd_migration/src/utilities/completeness_tracker.dart:43:5)
#19     CompilationUnitImpl.accept (package:analyzer/src/dart/ast/ast.dart:2076:50)
#20     NullabilityMigrationImpl.processInput (package:nnbd_migration/src/nullability_migration_impl.dart:231:12)
#21     NonNullableFix.processUnit (package:nnbd_migration/src/front_end/non_nullable_fix.dart:164:16)
#22     _FixCodeProcessor.runLaterPhases.<anonymous closure> (package:nnbd_migration/migration_cli.dart:1092:20)
#23     _FixCodeProcessor.runLaterPhases.<anonymous closure> (package:nnbd_migration/migration_cli.dart:1090:28)
#24     _FixCodeProcessor.processResources (package:nnbd_migration/migration_cli.dart:1024:26)
<asynchronous suspension>
#25     _FixCodeProcessor.runLaterPhases (package:nnbd_migration/migration_cli.dart:1090:5)
<asynchronous suspension>
#26     MigrationCliRunner.run (package:nnbd_migration/migration_cli.dart:697:24)
<asynchronous suspension>
#27     MigrateCommand.run (package:dartdev/src/commands/migrate.dart:37:7)
<asynchronous suspension>
#28     CommandRunner.runCommand (package:args/command_runner.dart:209:13)
<asynchronous suspension>
#29     DartdevRunner.runCommand (package:dartdev/dartdev.dart:223:18)
<asynchronous suspension>
#30     runDartdev (package:dartdev/dartdev.dart:66:16)
<asynchronous suspension>
#31     main (file:///opt/s/w/ir/cache/builder/sdk/pkg/dartdev/bin/dartdev.dart:11:3)
<asynchronous suspension>

[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.