Hive: RangeError running TypeAdapterGenerator with Uint8List

[jesusmartinoza]

Steps to Reproduce
When trying to generate a TypeAdapter with a Uint8list inside it throws the following error.
$ flutter packages pub run build_runner build --delete-conflicting-outputs -v

Error running TypeAdapterGenerator
RangeError (index): Invalid value: Valid value range is empty: 0
dart:core                                                               List.[]
package:hive_generator/src/class_builder.dart 86:38                     ClassBuilder._castIterable
package:hive_generator/src/class_builder.dart 69:36                     ClassBuilder._cast
package:hive_generator/src/class_builder.dart 59:34                     ClassBuilder.buildRead
package:hive_generator/src/type_adapter_generator.dart 24:19            TypeAdapterGenerator.generateForAnnotatedElement
package:source_gen/src/generator_for_annotation.dart 47:30              GeneratorForAnnotation.generate
package:source_gen/src/builder.dart 280:35                              _generate
package:source_gen/src/builder.dart 73:15                               _Builder._generateForLibrary
package:source_gen/src/builder.dart 67:11                               _Builder.build
package:build                                                           runBuilder
package:build_runner_core/src/generate/build_impl.dart 477:19           _SingleBuild._runForInput.<fn>.<fn>.<fn>
package:build_runner_core/src/generate/performance_tracker.dart 300:15  _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 475:23           _SingleBuild._runForInput.<fn>.<fn>
package:timing/src/timing.dart 222:44                                   NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 434:22           _SingleBuild._runForInput.<fn>
package:pool/pool.dart 127:28                                           Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 430:17           _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 378:38           _SingleBuild._runBuilder.<fn>
dart:async                                                              Future.wait
package:build_runner_core/src/generate/build_impl.dart 377:36           _SingleBuild._runBuilder
dart:async                                                              _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 375:40           _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 323:20           _SingleBuild._runPhases.<fn>.<fn>
dart:async                                                              _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart                  _SingleBuild._matchingPrimaryInputs

[SEVERE] Build:
Failed after 604ms
pub finished with exit code 1

#0      throwToolExit (package:flutter_tools/src/base/common.dart:28:3)
#1      pubInteractively (package:flutter_tools/src/dart/pub.dart:191:5)
<asynchronous suspension>
#2      PackagesPassthroughCommand.runCommand (package:flutter_tools/src/commands/packages.dart:227:11)
<asynchronous suspension>
#3      FlutterCommand.verifyThenRunCommand (package:flutter_tools/src/runner/flutter_command.dart:490:18)
#4      _asyncThenWrapperHelper.<anonymous closure> (dart:async-patch/async_patch.dart:71:64)
#5      _rootRunUnary (dart:async/zone.dart:1132:38)
#6      _CustomZone.runUnary (dart:async/zone.dart:1029:19)
#7      _FutureListener.handleValue (dart:async/future_impl.dart:137:18)
#8      Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:678:45)
#9      Future._propagateToListeners (dart:async/future_impl.dart:707:32)
#10     Future._completeWithValue (dart:async/future_impl.dart:522:5)
#11     Future._asyncComplete.<anonymous closure> (dart:async/future_impl.dart:552:7)
#12     _rootRun (dart:async/zone.dart:1124:13)
#13     _CustomZone.run (dart:async/zone.dart:1021:19)
#14     _CustomZone.runGuarded (dart:async/zone.dart:923:7)
#15     _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:963:23)
#16     _microtaskLoop (dart:async/schedule_microtask.dart:41:21)
#17     _startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5)
#18     _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:116:13)
#19     _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:173:5)

Code sample

part 'ThumbnailPicture.g.dart';

class ThumbnailPicture extends StatefulWidget {

  @HiveField(0)
  Uint8List byteData; 

  @override
  _ThumbnailPictureState createState() => _ThumbnailPictureState();
}

Version

• Platform: MacOS Mojave 10.14.6 (18G95)
• Flutter version: v1.9.1+hotfix.2
• Hive Generator version: 0.5.1
• Build Runner version : 1.7.0

[leisim]

Thanks for reporting this. The bug is fixed with the newest version of hive_generator.

[jesusmartinoza]

Thanks Leism for the fast response! :)