NoSuchMethodError: The getter 'definingUnit' was called on null.

[FabioPagano]

Using flutter 1.22.3, when I run "flutter pub run build_runner build" I receive the following:

[SEVERE] json_serializable:json_serializable on lib/arguments/customers_screen_arguments.dart:

NoSuchMethodError: The getter 'definingUnit' was called on null.
Receiver: null
Tried calling: definingUnit
#0      Object.noSuchMethod (dart:core-patch/object_patch.dart:51:5)
#1      LinkedElementFactory.isLibraryUri (package:analyzer/src/summary2/linked_element_factory.dart:133:28)
#2      LibraryContext.isLibraryUri (package:analyzer/src/dart/analysis/library_context.dart:97:27)
#3      LibraryAnalyzer._isLibrarySource (package:analyzer/src/dart/analysis/library_analyzer.dart:522:25)
#4      LibraryAnalyzer._resolveDirectives (package:analyzer/src/dart/analysis/library_analyzer.dart:562:36)
#5      LibraryAnalyzer.analyzeSync (package:analyzer/src/dart/analysis/library_analyzer.dart:136:5)
#6      LibraryAnalyzer.analyze (package:analyzer/src/dart/analysis/library_analyzer.dart:107:12)
#7      AnalysisDriver._computeAnalysisResult2.<anonymous closure> (package:analyzer/src/dart/analysis/driver.dart:1317:63)
#8      PerformanceLog.run (package:analyzer/src/dart/analysis/performance_logger.dart:32:15)
#9      AnalysisDriver._computeAnalysisResult2 (package:analyzer/src/dart/analysis/driver.dart:1294:20)
#10     AnalysisDriver._computeAnalysisResult.<anonymous closure> (package:analyzer/src/dart/analysis/driver.dart:1247:14)
#11     _rootRun (dart:async/zone.dart:1190:13)
#12     _CustomZone.run (dart:async/zone.dart:1093:19)
#13     _runZoned (dart:async/zone.dart:1630:10)
#14     runZoned (dart:async/zone.dart:1550:10)
#15     NullSafetyUnderstandingFlag.enableNullSafetyTypes (package:analyzer/dart/element/null_safety_understanding_flag.dart:42:12)
#16     AnalysisDriver._computeAnalysisResult (package:analyzer/src/dart/analysis/driver.dart:1246:40)
#17     AnalysisDriver._computeErrors (package:analyzer/src/dart/analysis/driver.dart:1372:41)
#18     AnalysisDriver.performWork (package:analyzer/src/dart/analysis/driver.dart:979:20)
#19     AnalysisDriverScheduler._run (package:analyzer/src/dart/analysis/driver.dart:2013:24)
<asynchronous suspension>
#20     AnalysisDriverScheduler.start (package:analyzer/src/dart/analysis/driver.dart:1936:5)
#21     analysisDriver (package:build_resolvers/src/analysis_driver.dart:62:13)
#22     AnalyzerResolvers._ensureInitialized.<anonymous closure> (package:build_resolvers/src/resolver.dart:306:26)
<asynchronous suspension>
#23     AnalyzerResolvers._ensureInitialized.<anonymous closure> (package:build_resolvers/src/resolver.dart)
#24     AnalyzerResolvers._ensureInitialized (package:build_resolvers/src/resolver.dart:309:6)
#25     AnalyzerResolvers.get (package:build_resolvers/src/resolver.dart:314:11)
#26     PerformanceTrackingResolvers.get.<anonymous closure> (package:build_runner_core/src/performance_tracking/performance_tracking_resolvers.dart:19:58)
#27     _NoOpBuilderActionTracker.trackStage (package:build_runner_core/src/generate/performance_tracker.dart:302:15)
#28     PerformanceTrackingResolvers.get (package:build_runner_core/src/performance_tracking/performance_tracking_resolvers.dart:19:16)
#29     BuildStepImpl.resolver (package:build/src/builder/build_step_impl.dart:74:54)
#30     _Builder.build (package:source_gen/src/builder.dart:72:32)
#31     runBuilder.buildForInput (package:build/src/generate/run_builder.dart:55:21)
#32     MappedListIterable.elementAt (dart:_internal/iterable.dart:417:31)
#33     ListIterator.moveNext (dart:_internal/iterable.dart:343:26)
#34     Future.wait (dart:async/future.dart:406:26)
#35     runBuilder.<anonymous closure> (package:build/src/generate/run_builder.dart:61:36)
#36     _rootRun (dart:async/zone.dart:1190:13)
#37     _CustomZone.run (dart:async/zone.dart:1093:19)
#38     _runZoned (dart:async/zone.dart:1630:10)
#39     runZonedGuarded (dart:async/zone.dart:1618:12)
#40     runZoned (dart:async/zone.dart:1547:12)
#41     scopeLogAsync (package:build/src/builder/logging.dart:26:3)
#42     runBuilder (package:build/src/generate/run_builder.dart:61:9)
#43     _SingleBuild._runForInput.<anonymous closure>.<anonymous closure>.<anonymous closure> (package:build_runner_core/src/generate/build_impl.dart:485:19)
#44     _NoOpBuilderActionTracker.trackStage (package:build_runner_core/src/generate/performance_tracker.dart:302:15)
#45     _SingleBuild._runForInput.<anonymous closure>.<anonymous closure> (package:build_runner_core/src/generate/build_impl.dart:483:23)
<asynchronous suspension>
#46     _SingleBuild._runForInput.<anonymous closure>.<anonymous closure> (package:build_runner_core/src/generate/build_impl.dart)
#47     NoOpTimeTracker.track (package:timing/src/timing.dart:222:44)
#48     _SingleBuild._runForInput.<anonymous closure> (package:build_runner_core/src/generate/build_impl.dart:440:22)
#49     Pool.withResource (package:pool/pool.dart:127:28)
<asynchronous suspension>
#50     _SingleBuild._runForInput (package:build_runner_core/src/generate/build_impl.dart:436:17)
#51     _SingleBuild._runBuilder.<anonymous closure> (package:build_runner_core/src/generate/build_impl.dart:374:38)
#52     MappedIterator.moveNext (dart:_internal/iterable.dart:392:20)
#53     Future.wait (dart:async/future.dart:406:26)
#54     _SingleBuild._runBuilder (package:build_runner_core/src/generate/build_impl.dart:373:36)
#55     _SingleBuild._runPhases.<anonymous closure>.<anonymous closure> (package:build_runner_core/src/generate/build_impl.dart:319:20)
<asynchronous suspension>
#56     _SingleBuild._runPhases.<anonymous closure>.<anonymous closure> (package:build_runner_core/src/generate/build_impl.dart)
#57     _NoOpBuildPerformanceTracker.trackBuildPhase (package:build_runner_core/src/generate/performance_tracker.dart:184:15)
#58     _SingleBuild._runPhases.<anonymous closure> (package:build_runner_core/src/generate/build_impl.dart:315:47)
#59     NoOpTimeTracker.track (package:timing/src/timing.dart:222:44)
#60     _SingleBuild._runPhases (package:build_runner_core/src/generate/build_impl.dart:309:32)
#61     logTimedAsync (package:build_runner_core/src/logging/logging.dart:25:30)
#62     _SingleBuild._safeBuild.<anonymous closure> (package:build_runner_core/src/generate/build_impl.dart:266:26)
#63     _rootRun (dart:async/zone.dart:1190:13)
#64     _CustomZone.run (dart:async/zone.dart:1093:19)
#65     _runZoned (dart:async/zone.dart:1630:10)
#66     runZonedGuarded (dart:async/zone.dart:1618:12)
#67     runZoned (dart:async/zone.dart:1547:12)
#68     _SingleBuild._safeBuild (package:build_runner_core/src/generate/build_impl.dart:261:5)
#69     _SingleBuild.run (package:build_runner_core/src/generate/build_impl.dart:208:24)
#70     BuildImpl.run (package:build_runner_core/src/generate/build_impl.dart:94:56)
#71     BuildRunner.run (package:build_runner_core/src/generate/build_runner.dart:25:14)
#72     build (package:build_runner/src/generate/build.dart:107:21)
<asynchronous suspension>
#73     BuildCommand._run (package:build_runner/src/entrypoint/build.dart:35:24)
#74     BuildCommand.run.<anonymous closure> (package:build_runner/src/entrypoint/build.dart:31:15)
#75     _rootRun (dart:async/zone.dart:1190:13)
#76     _CustomZone.run (dart:async/zone.dart:1093:19)
#77     _runZoned (dart:async/zone.dart:1630:10)
#78     runZoned (dart:async/zone.dart:1550:10)
#79     withEnabledExperiments (package:build/src/experiments.dart:18:5)
#80     BuildCommand.run (package:build_runner/src/entrypoint/build.dart:30:12)
#81     CommandRunner.runCommand (package:args/command_runner.dart:197:27)
#82     CommandRunner.run.<anonymous closure> (package:args/command_runner.dart:112:25)
#83     new Future.sync (dart:async/future.dart:223:31)
#84     CommandRunner.run (package:args/command_runner.dart:112:14)
#85     run (package:build_runner/src/entrypoint/run.dart:25:31)
<asynchronous suspension>
#86     main (file:///C:/_eic/app/eic_app_front/.dart_tool/build/entrypoint/build.dart:27:22)
#87     _startIsolate.<anonymous closure> (dart:isolate-patch/isolate_patch.dart:297:32)
#88     _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:168:12)

package:analyzer/src/dart/analysis/driver.dart 1347:9                                         AnalysisDriver._computeAnalysisResult2.<fn>
package:analyzer/src/dart/analysis/performance_logger.dart 32:15                              PerformanceLog.run
package:analyzer/src/dart/analysis/driver.dart 1294:20                                        AnalysisDriver._computeAnalysisResult2
package:analyzer/src/dart/analysis/driver.dart 1247:14                                        AnalysisDriver._computeAnalysisResult.<fn>
dart:async                                                                                    runZoned
package:analyzer/dart/element/null_safety_understanding_flag.dart 42:12                       NullSafetyUnderstandingFlag.enableNullSafetyTypes
package:analyzer/src/dart/analysis/driver.dart 1246:40                                        AnalysisDriver._computeAnalysisResult
package:analyzer/src/dart/analysis/driver.dart 1372:41                                        AnalysisDriver._computeErrors
package:analyzer/src/dart/analysis/driver.dart 979:20                                         AnalysisDriver.performWork
package:analyzer/src/dart/analysis/driver.dart 2013:24                                        AnalysisDriverScheduler._run
package:analyzer/src/dart/analysis/driver.dart 1936:5                                         AnalysisDriverScheduler.start
package:build_resolvers/src/analysis_driver.dart 62:13                                        analysisDriver
package:build_resolvers/src/resolver.dart 306:26                                              AnalyzerResolvers._ensureInitialized.<fn>
package:build_resolvers/src/resolver.dart                                                     AnalyzerResolvers._ensureInitialized.<fn>
package:build_resolvers/src/resolver.dart 309:6                                               AnalyzerResolvers._ensureInitialized
package:build_resolvers/src/resolver.dart 314:11                                              AnalyzerResolvers.get
package:build_runner_core/src/performance_tracking/performance_tracking_resolvers.dart 19:58  PerformanceTrackingResolvers.get.<fn>
package:build_runner_core/src/generate/performance_tracker.dart 302:15                        _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/performance_tracking/performance_tracking_resolvers.dart 19:16  PerformanceTrackingResolvers.get
package:build                                                                                 BuildStepImpl.resolver
package:source_gen/src/builder.dart 72:32                                                     _Builder.build
package:build                                                                                 runBuilder
package:build_runner_core/src/generate/build_impl.dart 485:19                                 _SingleBuild._runForInput.<fn>.<fn>.<fn>
package:build_runner_core/src/generate/performance_tracker.dart 302:15                        _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 483:23                                 _SingleBuild._runForInput.<fn>.<fn>
package:build_runner_core/src/generate/build_impl.dart                                        _SingleBuild._runForInput.<fn>.<fn>
package:timing/src/timing.dart 222:44                                                         NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 440:22                                 _SingleBuild._runForInput.<fn>
package:pool/pool.dart 127:28                                                                 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 436:17                                 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 374:38                                 _SingleBuild._runBuilder.<fn>
dart:async                                                                                    Future.wait
package:build_runner_core/src/generate/build_impl.dart 373:36                                 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 319:20                                 _SingleBuild._runPhases.<fn>.<fn>
package:build_runner_core/src/generate/build_impl.dart                                        _SingleBuild._runPhases.<fn>.<fn>
package:build_runner_core/src/generate/performance_tracker.dart 184:15                        _NoOpBuildPerformanceTracker.trackBuildPhase
package:build_runner_core/src/generate/build_impl.dart 315:47                                 _SingleBuild._runPhases.<fn>
package:timing/src/timing.dart 222:44                                                         NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 309:32                                 _SingleBuild._runPhases
package:build_runner_core/src/logging/logging.dart 25:30                                      logTimedAsync
package:build_runner_core/src/generate/build_impl.dart 266:26                                 _SingleBuild._safeBuild.<fn>
dart:async                                                                                    runZoned
package:build_runner_core/src/generate/build_impl.dart 261:5                                  _SingleBuild._safeBuild
package:build_runner_core/src/generate/build_impl.dart 208:24                                 _SingleBuild.run
package:build_runner_core/src/generate/build_impl.dart 94:56                                  BuildImpl.run
package:build_runner_core/src/generate/build_runner.dart 25:14                                BuildRunner.run
package:build_runner                                                                          BuildCommand.run
package:args/command_runner.dart 197:27                                                       CommandRunner.runCommand
package:args/command_runner.dart 112:25                                                       CommandRunner.run.<fn>
dart:async                                                                                    new Future.sync
package:args/command_runner.dart 112:14                                                       CommandRunner.run
package:build_runner                                                                          run
.dart_tool\build\entrypoint\build.dart 27:22                                                  main

This is the code of "customers_screen_arguments.dart":

enum CallingAction { Customers1, CustomersOfAdministrator }

class CustomersScreenArguments {
  final CallingAction callingAction;
  final int administratorCode;
  CustomersScreenArguments(this.callingAction, {this.administratorCode});
}

This is the result of "flutter --version:

Flutter 1.22.3 • channel stable • https://github.com/flutter/flutter.git
Framework • revision 8874f21e79 (3 days ago) • 2020-10-29 14:14:35 -0700
Engine • revision a1440ca392
Tools • Dart 2.10.3

This is the pubspec.yaml:

version: 1.0.0+1

environment:
  sdk: ">=2.7.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter
  provider: ^4.0.5
  http: ^0.12.0+2
  shared_preferences: ^0.5.6+3
  json_annotation: ^3.0.0
  material_design_icons_flutter: 4.0.5345
   flutter_icons: ^1.1.0 
  url_launcher: ^5.4.10
  
  cupertino_icons: ^0.1.2

  package_info: ^0.4.1

dev_dependencies:
  flutter_test:
    sdk: flutter
  json_serializable: ^3.3.0
  build_runner: ^1.6.7
  sqflite: ^1.3.0
  path: ^1.6.4

flutter:

  uses-material-design: true
  assets:
    - assets/collaboration.png
```

Thank you.

[Alex-911]

still working on it.

[mulieriq]

I am getting the same error

[Alex-911]

try with Analyzer: 0.40.5 as dependency if it work 🤞.

[FabioPagano]

I've put in the pubspec.yaml the override:
dependency_overrides: analyzer: 0.40.5
but the error is the same.

[kevmoo]

@FabioPagano – would you include the full contents of pubspec.lock here?

[FabioPagano]

Here is the pubspec.lock:

# Generated by pub

packages:
  _fe_analyzer_shared:
    dependency: transitive
    description:
      name: _fe_analyzer_shared
      url: "https://pub.dartlang.org"
    source: hosted
    version: "12.0.0"
  analyzer:
    dependency: "direct overridden"
    description:
      name: analyzer
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.40.5"
  args:
    dependency: transitive
    description:
      name: args
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.6.0"
  async:
    dependency: transitive
    description:
      name: async
      url: "https://pub.dartlang.org"
    source: hosted
    version: "2.5.0-nullsafety.1"
  boolean_selector:
    dependency: transitive
    description:
      name: boolean_selector
      url: "https://pub.dartlang.org"
    source: hosted
    version: "2.1.0-nullsafety.1"
  build:
    dependency: transitive
    description:
      name: build
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.5.0"
  build_config:
    dependency: transitive
    description:
      name: build_config
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.4.2"
  build_daemon:
    dependency: transitive
    description:
      name: build_daemon
      url: "https://pub.dartlang.org"
    source: hosted
    version: "2.1.4"
  build_resolvers:
    dependency: transitive
    description:
      name: build_resolvers
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.4.3"
  build_runner:
    dependency: "direct dev"
    description:
      name: build_runner
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.10.4"
  build_runner_core:
    dependency: transitive
    description:
      name: build_runner_core
      url: "https://pub.dartlang.org"
    source: hosted
    version: "6.0.3"
  built_collection:
    dependency: transitive
    description:
      name: built_collection
      url: "https://pub.dartlang.org"
    source: hosted
    version: "4.3.2"
  built_value:
    dependency: transitive
    description:
      name: built_value
      url: "https://pub.dartlang.org"
    source: hosted
    version: "7.1.0"
  characters:
    dependency: transitive
    description:
      name: characters
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.1.0-nullsafety.3"
  charcode:
    dependency: transitive
    description:
      name: charcode
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.2.0-nullsafety.1"
  checked_yaml:
    dependency: transitive
    description:
      name: checked_yaml
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.0.2"
  cli_util:
    dependency: transitive
    description:
      name: cli_util
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.2.0"
  clock:
    dependency: transitive
    description:
      name: clock
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.1.0-nullsafety.1"
  code_builder:
    dependency: transitive
    description:
      name: code_builder
      url: "https://pub.dartlang.org"
    source: hosted
    version: "3.5.0"
  collection:
    dependency: transitive
    description:
      name: collection
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.15.0-nullsafety.3"
  convert:
    dependency: transitive
    description:
      name: convert
      url: "https://pub.dartlang.org"
    source: hosted
    version: "2.1.1"
  crypto:
    dependency: transitive
    description:
      name: crypto
      url: "https://pub.dartlang.org"
    source: hosted
    version: "2.1.5"
  cupertino_icons:
    dependency: "direct main"
    description:
      name: cupertino_icons
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.1.3"
  dart_style:
    dependency: transitive
    description:
      name: dart_style
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.3.9"
  fake_async:
    dependency: transitive
    description:
      name: fake_async
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.2.0-nullsafety.1"
  ffi:
    dependency: transitive
    description:
      name: ffi
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.1.3"
  file:
    dependency: transitive
    description:
      name: file
      url: "https://pub.dartlang.org"
    source: hosted
    version: "5.2.1"
  fixnum:
    dependency: transitive
    description:
      name: fixnum
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.10.11"
  flutter:
    dependency: "direct main"
    description: flutter
    source: sdk
    version: "0.0.0"
  flutter_icons:
    dependency: "direct main"
    description:
      name: flutter_icons
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.1.0"
  flutter_test:
    dependency: "direct dev"
    description: flutter
    source: sdk
    version: "0.0.0"
  flutter_web_plugins:
    dependency: transitive
    description: flutter
    source: sdk
    version: "0.0.0"
  glob:
    dependency: transitive
    description:
      name: glob
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.2.0"
  graphs:
    dependency: transitive
    description:
      name: graphs
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.2.0"
  http:
    dependency: "direct main"
    description:
      name: http
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.12.2"
  http_multi_server:
    dependency: transitive
    description:
      name: http_multi_server
      url: "https://pub.dartlang.org"
    source: hosted
    version: "2.2.0"
  http_parser:
    dependency: transitive
    description:
      name: http_parser
      url: "https://pub.dartlang.org"
    source: hosted
    version: "3.1.4"
  intl:
    dependency: transitive
    description:
      name: intl
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.16.1"
  io:
    dependency: transitive
    description:
      name: io
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.3.4"
  js:
    dependency: transitive
    description:
      name: js
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.6.2"
  json_annotation:
    dependency: "direct main"
    description:
      name: json_annotation
      url: "https://pub.dartlang.org"
    source: hosted
    version: "3.1.0"
  json_serializable:
    dependency: "direct dev"
    description:
      name: json_serializable
      url: "https://pub.dartlang.org"
    source: hosted
    version: "3.5.0"
  logging:
    dependency: transitive
    description:
      name: logging
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.11.4"
  matcher:
    dependency: transitive
    description:
      name: matcher
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.12.10-nullsafety.1"
  material_design_icons_flutter:
    dependency: "direct main"
    description:
      name: material_design_icons_flutter
      url: "https://pub.dartlang.org"
    source: hosted
    version: "4.0.5345"
  meta:
    dependency: transitive
    description:
      name: meta
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.3.0-nullsafety.3"
  mime:
    dependency: transitive
    description:
      name: mime
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.9.7"
  nested:
    dependency: transitive
    description:
      name: nested
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.0.4"
  node_interop:
    dependency: transitive
    description:
      name: node_interop
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.2.0"
  node_io:
    dependency: transitive
    description:
      name: node_io
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.1.1"
  package_config:
    dependency: transitive
    description:
      name: package_config
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.9.3"
  package_info:
    dependency: "direct main"
    description:
      name: package_info
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.4.3"
  path:
    dependency: "direct dev"
    description:
      name: path
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.8.0-nullsafety.1"
  path_provider_linux:
    dependency: transitive
    description:
      name: path_provider_linux
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.0.1+2"
  path_provider_platform_interface:
    dependency: transitive
    description:
      name: path_provider_platform_interface
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.0.3"
  path_provider_windows:
    dependency: transitive
    description:
      name: path_provider_windows
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.0.4+1"
  pedantic:
    dependency: transitive
    description:
      name: pedantic
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.9.2"
  platform:
    dependency: transitive
    description:
      name: platform
      url: "https://pub.dartlang.org"
    source: hosted
    version: "2.2.1"
  plugin_platform_interface:
    dependency: transitive
    description:
      name: plugin_platform_interface
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.0.3"
  pool:
    dependency: transitive
    description:
      name: pool
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.4.0"
  process:
    dependency: transitive
    description:
      name: process
      url: "https://pub.dartlang.org"
    source: hosted
    version: "3.0.13"
  provider:
    dependency: "direct main"
    description:
      name: provider
      url: "https://pub.dartlang.org"
    source: hosted
    version: "4.3.2+2"
  pub_semver:
    dependency: transitive
    description:
      name: pub_semver
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.4.4"
  pubspec_parse:
    dependency: transitive
    description:
      name: pubspec_parse
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.1.5"
  quiver:
    dependency: transitive
    description:
      name: quiver
      url: "https://pub.dartlang.org"
    source: hosted
    version: "2.1.4+1"
  shared_preferences:
    dependency: "direct main"
    description:
      name: shared_preferences
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.5.12+2"
  shared_preferences_linux:
    dependency: transitive
    description:
      name: shared_preferences_linux
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.0.2+2"
  shared_preferences_macos:
    dependency: transitive
    description:
      name: shared_preferences_macos
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.0.1+10"
  shared_preferences_platform_interface:
    dependency: transitive
    description:
      name: shared_preferences_platform_interface
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.0.4"
  shared_preferences_web:
    dependency: transitive
    description:
      name: shared_preferences_web
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.1.2+7"
  shared_preferences_windows:
    dependency: transitive
    description:
      name: shared_preferences_windows
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.0.1+1"
  shelf:
    dependency: transitive
    description:
      name: shelf
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.7.9"
  shelf_web_socket:
    dependency: transitive
    description:
      name: shelf_web_socket
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.2.3"
  sky_engine:
    dependency: transitive
    description: flutter
    source: sdk
    version: "0.0.99"
  source_gen:
    dependency: transitive
    description:
      name: source_gen
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.9.8"
  source_span:
    dependency: transitive
    description:
      name: source_span
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.8.0-nullsafety.2"
  sqflite:
    dependency: "direct dev"
    description:
      name: sqflite
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.3.2+1"
  sqflite_common:
    dependency: transitive
    description:
      name: sqflite_common
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.0.2+1"
  stack_trace:
    dependency: transitive
    description:
      name: stack_trace
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.10.0-nullsafety.1"
  stream_channel:
    dependency: transitive
    description:
      name: stream_channel
      url: "https://pub.dartlang.org"
    source: hosted
    version: "2.1.0-nullsafety.1"
  stream_transform:
    dependency: transitive
    description:
      name: stream_transform
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.2.0"
  string_scanner:
    dependency: transitive
    description:
      name: string_scanner
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.1.0-nullsafety.1"
  synchronized:
    dependency: transitive
    description:
      name: synchronized
      url: "https://pub.dartlang.org"
    source: hosted
    version: "2.2.0+2"
  term_glyph:
    dependency: transitive
    description:
      name: term_glyph
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.2.0-nullsafety.1"
  test_api:
    dependency: transitive
    description:
      name: test_api
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.2.19-nullsafety.2"
  timing:
    dependency: transitive
    description:
      name: timing
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.1.1+2"
  typed_data:
    dependency: transitive
    description:
      name: typed_data
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.3.0-nullsafety.3"
  url_launcher:
    dependency: "direct main"
    description:
      name: url_launcher
      url: "https://pub.dartlang.org"
    source: hosted
    version: "5.7.8"
  url_launcher_linux:
    dependency: transitive
    description:
      name: url_launcher_linux
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.0.1+3"
  url_launcher_macos:
    dependency: transitive
    description:
      name: url_launcher_macos
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.0.1+8"
  url_launcher_platform_interface:
    dependency: transitive
    description:
      name: url_launcher_platform_interface
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.0.9"
  url_launcher_web:
    dependency: transitive
    description:
      name: url_launcher_web
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.1.5"
  url_launcher_windows:
    dependency: transitive
    description:
      name: url_launcher_windows
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.0.1+1"
  vector_math:
    dependency: transitive
    description:
      name: vector_math
      url: "https://pub.dartlang.org"
    source: hosted
    version: "2.1.0-nullsafety.3"
  watcher:
    dependency: transitive
    description:
      name: watcher
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.9.7+15"
  web_socket_channel:
    dependency: transitive
    description:
      name: web_socket_channel
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.1.0"
  win32:
    dependency: transitive
    description:
      name: win32
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.7.3"
  xdg_directories:
    dependency: transitive
    description:
      name: xdg_directories
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.1.2"
  yaml:
    dependency: transitive
    description:
      name: yaml
      url: "https://pub.dartlang.org"
    source: hosted
    version: "2.2.1"
sdks:
  dart: ">=2.10.2 <2.11.0"
  flutter: ">=1.22.2 <2.0.0"

Thank you.

[Alex-911]

remove the version number from build_runner and run the command again
flutter pub run build_runner build --delete-conflicting-outputs

its wired but works for me.

[mulieriq]

try with Analyzer: 0.40.5 as dependency if it work 🤞.

Awesome it worked

[FabioPagano]

@Alex-911

remove the version number from build_runner and run the command again
flutter pub run build_runner build --delete-conflicting-outputs

its wired but works for me.

Don't know if I've done right: in pubspec.yaml I've changed (in section "dev_dependencies") the dependency "build_runner: ^1.6.7" to "build_runner:" (without the number), but I've had the same error "The getter 'definingUnit' was called on null". Please advise if I had to do something different.

If needed, I have no problem to send the full source code for analysis.

Thank you.

[FabioPagano]

@EricRootLee

try with Analyzer: 0.40.5 as dependency if it work 🤞.

Awesome it worked

Please Eric may you kindly share your pubspec.yaml and pubspec.lock?

Thank you.

[ashgarg143]

try with Analyzer: 0.40.5 as dependency if it work crossed_fingers.

Awesome it worked

Hey got the same error after flutter upgrade and tried this by adding analyzer: ^0.40.6 in dependencies but still getting same error. Can you please help.
If nothing works i am thinking of degrading my flutter version.
Thanks in advance

[iktakahiro]

same error here, my solution is downgrading build_runner: 1.10.2

[JDLegaspi]

same error here, my solution is downgrading build_runner: 1.10.2

Thanks @iktakahiro worked for me on: Flutter (Channel master, 1.24.0-8.0.pre.111, on Mac OS X 10.15.7)

I had to run the following for it to work:

flutter clean 
flutter upgrade
flutter packages pub upgrade 
flutter pub run build_runner build

[kevmoo]

Any thoughts here @jakemac53 and @natebosch ?

[natebosch]

cc @scheglov

I'm having a hard time following what we've learned so far, are there definite versions of analyzer where this does and doesn't work? I would not expect the build_runner version to impact this, except for the indirect ways it influences which version of analyzer get chosen. It's possible that different versions of build_resolvers have an effect here, but I would be a little surprised.

If this is working on the latest analyzer I think the solution is to get folks upgraded to that.