flutter packages pub run build_runner build [SEVERE] Failed after 30.4s

[greatbaedee]

I am new to flutter, I don't know it is failing.

$ flutter packages pub run build_runner build
[INFO] Generating build script...
[INFO] Generating build script completed, took 478ms

[INFO] Initializing inputs
[INFO] Reading cached asset graph...
[INFO] Reading cached asset graph completed, took 147ms

[INFO] Checking for updates since last build...
[INFO] Checking for updates since last build completed, took 1.2s

[WARNING] Invalidating asset graph due to build script update!
[INFO] Cleaning up outputs from previous builds....
[INFO] Cleaning up outputs from previous builds. completed, took 5.1s

[INFO] Generating build script...
[INFO] Generating build script completed, took 161ms

[INFO] Creating build script snapshot......
[INFO] Creating build script snapshot... completed, took 26.5s

[INFO] Initializing inputs
[INFO] Building new asset graph...
[INFO] Building new asset graph completed, took 1.4s

[INFO] Checking for unexpected pre-existing outputs....
[INFO] Checking for unexpected pre-existing outputs. completed, took 1ms

[INFO] Running build...
[SEVERE] json_serializable:json_serializable on lib/Screens/Home/home_screen copy 3.dart:

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
[SEVERE] json_serializable:json_serializable on lib/Screens/Home/home_screen copy.dart:

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
[SEVERE] json_serializable:json_serializable on lib/Screens/Home/home_screen copy 2.dart:

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
[INFO] 1.5s elapsed, 4/20 actions completed.
[INFO] 2.7s elapsed, 6/22 actions completed.
[SEVERE] json_serializable:json_serializable on lib/Screens/Login/login_screen copy.dart:

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
[INFO] 4.5s elapsed, 9/25 actions completed.
[INFO] 5.6s elapsed, 9/25 actions completed.
[SEVERE] json_serializable:json_serializable on lib/Screens/Login/login_screen copy 2.dart:

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
[INFO] 7.9s elapsed, 10/26 actions completed.
[INFO] 15.6s elapsed, 11/26 actions completed.
[SEVERE] json_serializable:json_serializable on lib/Screens/Login/login_screen copy 3.dart:

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
[INFO] 17.6s elapsed, 29/42 actions completed.
[SEVERE] json_serializable:json_serializable on lib/Screens/Files/files copy 2.dart:

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
[SEVERE] json_serializable:json_serializable on lib/Screens/Files/files copy.dart:

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
[SEVERE] json_serializable:json_serializable on lib/Screens/Task/task copy.dart:

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
[SEVERE] json_serializable:json_serializable on lib/Screens/Resources/resources copy.dart:

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
[SEVERE] json_serializable:json_serializable on lib/Screens/Files/files copy 3.dart:

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
[SEVERE] json_serializable:json_serializable on lib/Screens/Inventory/article copy.dart:

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
[SEVERE] json_serializable:json_serializable on lib/Screens/Inventory/inventory copy.dart:

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
[SEVERE] json_serializable:json_serializable on lib/Screens/Inventory/inventory copy 2.dart:

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
[SEVERE] json_serializable:json_serializable on lib/Screens/Inventory/article copy 2.dart:

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
[INFO] 19.5s elapsed, 63/79 actions completed.
[SEVERE] json_serializable:json_serializable on lib/models/ShippingDetail copy.dart:

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
[SEVERE] json_serializable:json_serializable on lib/app copy.dart:

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
[INFO] 21.7s elapsed, 155/171 actions completed.
[INFO] 22.8s elapsed, 155/171 actions completed.
[INFO] 23.8s elapsed, 171/171 actions completed.
[INFO] 24.9s elapsed, 177/182 actions completed.
[INFO] 26.0s elapsed, 177/182 actions completed.
[SEVERE] chopper_generator:chopper_generator on lib/Screens/Home/home_screen copy 3.dart:

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
[SEVERE] chopper_generator:chopper_generator on lib/Screens/Home/home_screen copy.dart:

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
[SEVERE] chopper_generator:chopper_generator on lib/Screens/Home/home_screen copy 2.dart:

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
[SEVERE] chopper_generator:chopper_generator on lib/Screens/Login/login_screen copy.dart:

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
[SEVERE] chopper_generator:chopper_generator on lib/Screens/Login/login_screen copy 2.dart:

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
[SEVERE] chopper_generator:chopper_generator on lib/Screens/Files/files copy.dart:

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
[SEVERE] chopper_generator:chopper_generator on lib/Screens/Files/files copy 2.dart:

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
[SEVERE] chopper_generator:chopper_generator on lib/Screens/Login/login_screen copy 3.dart:

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
[SEVERE] chopper_generator:chopper_generator on lib/Screens/Task/task copy.dart:

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
[SEVERE] chopper_generator:chopper_generator on lib/Screens/Resources/resources copy.dart:

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
[SEVERE] chopper_generator:chopper_generator on lib/Screens/Files/files copy 3.dart:

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
[SEVERE] chopper_generator:chopper_generator on lib/Screens/Inventory/inventory copy.dart:

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
[SEVERE] chopper_generator:chopper_generator on lib/Screens/Inventory/inventory copy 2.dart:

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
[SEVERE] chopper_generator:chopper_generator on lib/Screens/Inventory/article copy.dart:

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
[SEVERE] chopper_generator:chopper_generator on lib/Screens/Inventory/article copy 2.dart:

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
[SEVERE] chopper_generator:chopper_generator on lib/models/ShippingDetail copy.dart:

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
[SEVERE] chopper_generator:chopper_generator on lib/app copy.dart:

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
[INFO] Running build completed, took 28.2s

[INFO] Caching finalized dependency graph...
[INFO] 29.2s elapsed, 315/315 actions completed.
[INFO] 30.3s elapsed, 315/315 actions completed.
[INFO] Caching finalized dependency graph completed, took 2.2s

[SEVERE] Failed after 30.4s

[kevmoo]

CC @natebosch @jakemac53

[jakemac53]

@greatbaedee can you run with --verbose? That should give stack traces.

[natebosch]

I'm curious if a pub upgrade would help - the message strikes me as something that might happen if there is a bad version of analyzer or similar.

[greatbaedee]

@natebosch I have run flutter pub upgrade and that didn't help.

$ flutter pub upgrade
Running "flutter pub upgrade" in greatbaedee... 9.1s

[greatbaedee]

@jakemac53 this is the response

package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] chopper_generator:chopper_generator on lib/Screens/Home/home_screen copy.dart (cached):

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
dart:core Object.noSuchMethod
package:analyzer/src/dart/analysis/driver.dart 634:23 AnalysisDriver.getLibraryByUri
package:build_resolvers/src/resolver.dart 104:20 AnalyzerResolver.libraryFor
package:build_resolvers/src/resolver.dart 73:17 PerActionResolver.libraryFor
package:build BuildStepImpl.inputLibrary
package:source_gen/src/builder.dart 66:33 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 491:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 300:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 489:23 _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 446:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 442:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 380:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] chopper_generator:chopper_generator on lib/Screens/Home/home_screen copy.dart (cached):

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
dart:core Object.noSuchMethod
package:analyzer/src/dart/analysis/driver.dart 634:23 AnalysisDriver.getLibraryByUri
package:build_resolvers/src/resolver.dart 104:20 AnalyzerResolver.libraryFor
package:build_resolvers/src/resolver.dart 73:17 PerActionResolver.libraryFor
package:build BuildStepImpl.inputLibrary
package:source_gen/src/builder.dart 66:33 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 491:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 300:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 489:23 _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 446:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 442:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 380:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] chopper_generator:chopper_generator on lib/Screens/Inventory/inventory copy.dart (cached):

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
dart:core Object.noSuchMethod
package:analyzer/src/dart/analysis/driver.dart 634:23 AnalysisDriver.getLibraryByUri
package:build_resolvers/src/resolver.dart 104:20 AnalyzerResolver.libraryFor
package:build_resolvers/src/resolver.dart 73:17 PerActionResolver.libraryFor
package:build BuildStepImpl.inputLibrary
package:source_gen/src/builder.dart 66:33 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 491:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 300:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 489:23 _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 446:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 442:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 380:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] chopper_generator:chopper_generator on lib/Screens/Inventory/inventory copy.dart (cached):

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
dart:core Object.noSuchMethod
package:analyzer/src/dart/analysis/driver.dart 634:23 AnalysisDriver.getLibraryByUri
package:build_resolvers/src/resolver.dart 104:20 AnalyzerResolver.libraryFor
package:build_resolvers/src/resolver.dart 73:17 PerActionResolver.libraryFor
package:build BuildStepImpl.inputLibrary
package:source_gen/src/builder.dart 66:33 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 491:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 300:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 489:23 _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 446:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 442:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 380:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] json_serializable:json_serializable on lib/Screens/Inventory/article copy.dart (cached):

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
dart:core Object.noSuchMethod
package:analyzer/src/dart/analysis/driver.dart 634:23 AnalysisDriver.getLibraryByUri
package:build_resolvers/src/resolver.dart 104:20 AnalyzerResolver.libraryFor
package:build_resolvers/src/resolver.dart 73:17 PerActionResolver.libraryFor
package:build BuildStepImpl.inputLibrary
package:source_gen/src/builder.dart 66:33 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 491:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 300:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 489:23 _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 446:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 442:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 380:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] json_serializable:json_serializable on lib/Screens/Inventory/article copy.dart (cached):

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
dart:core Object.noSuchMethod
package:analyzer/src/dart/analysis/driver.dart 634:23 AnalysisDriver.getLibraryByUri
package:build_resolvers/src/resolver.dart 104:20 AnalyzerResolver.libraryFor
package:build_resolvers/src/resolver.dart 73:17 PerActionResolver.libraryFor
package:build BuildStepImpl.inputLibrary
package:source_gen/src/builder.dart 66:33 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 491:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 300:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 489:23 _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 446:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 442:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 380:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] chopper_generator:chopper_generator on lib/Screens/Home/home_screen copy 2.dart (cached):

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
dart:core Object.noSuchMethod
package:analyzer/src/dart/analysis/driver.dart 634:23 AnalysisDriver.getLibraryByUri
package:build_resolvers/src/resolver.dart 104:20 AnalyzerResolver.libraryFor
package:build_resolvers/src/resolver.dart 73:17 PerActionResolver.libraryFor
package:build BuildStepImpl.inputLibrary
package:source_gen/src/builder.dart 66:33 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 491:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 300:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 489:23 _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 446:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 442:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 380:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] chopper_generator:chopper_generator on lib/Screens/Home/home_screen copy 2.dart (cached):

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
dart:core Object.noSuchMethod
package:analyzer/src/dart/analysis/driver.dart 634:23 AnalysisDriver.getLibraryByUri
package:build_resolvers/src/resolver.dart 104:20 AnalyzerResolver.libraryFor
package:build_resolvers/src/resolver.dart 73:17 PerActionResolver.libraryFor
package:build BuildStepImpl.inputLibrary
package:source_gen/src/builder.dart 66:33 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 491:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 300:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 489:23 _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 446:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 442:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 380:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] chopper_generator:chopper_generator on lib/Screens/Home/home_screen copy 3.dart (cached):

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
dart:core Object.noSuchMethod
package:analyzer/src/dart/analysis/driver.dart 634:23 AnalysisDriver.getLibraryByUri
package:build_resolvers/src/resolver.dart 104:20 AnalyzerResolver.libraryFor
package:build_resolvers/src/resolver.dart 73:17 PerActionResolver.libraryFor
package:build BuildStepImpl.inputLibrary
package:source_gen/src/builder.dart 66:33 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 491:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 300:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 489:23 _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 446:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 442:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 380:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] chopper_generator:chopper_generator on lib/Screens/Home/home_screen copy 3.dart (cached):

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
dart:core Object.noSuchMethod
package:analyzer/src/dart/analysis/driver.dart 634:23 AnalysisDriver.getLibraryByUri
package:build_resolvers/src/resolver.dart 104:20 AnalyzerResolver.libraryFor
package:build_resolvers/src/resolver.dart 73:17 PerActionResolver.libraryFor
package:build BuildStepImpl.inputLibrary
package:source_gen/src/builder.dart 66:33 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 491:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 300:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 489:23 _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 446:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 442:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 380:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] chopper_generator:chopper_generator on lib/models/ShippingDetail copy.dart (cached):

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
dart:core Object.noSuchMethod
package:analyzer/src/dart/analysis/driver.dart 634:23 AnalysisDriver.getLibraryByUri
package:build_resolvers/src/resolver.dart 104:20 AnalyzerResolver.libraryFor
package:build_resolvers/src/resolver.dart 73:17 PerActionResolver.libraryFor
package:build BuildStepImpl.inputLibrary
package:source_gen/src/builder.dart 66:33 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 491:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 300:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 489:23 _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 446:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 442:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 380:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] chopper_generator:chopper_generator on lib/models/ShippingDetail copy.dart (cached):

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
dart:core Object.noSuchMethod
package:analyzer/src/dart/analysis/driver.dart 634:23 AnalysisDriver.getLibraryByUri
package:build_resolvers/src/resolver.dart 104:20 AnalyzerResolver.libraryFor
package:build_resolvers/src/resolver.dart 73:17 PerActionResolver.libraryFor
package:build BuildStepImpl.inputLibrary
package:source_gen/src/builder.dart 66:33 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 491:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 300:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 489:23 _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 446:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 442:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 380:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] chopper_generator:chopper_generator on lib/app copy.dart (cached):

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
dart:core Object.noSuchMethod
package:analyzer/src/dart/analysis/driver.dart 634:23 AnalysisDriver.getLibraryByUri
package:build_resolvers/src/resolver.dart 104:20 AnalyzerResolver.libraryFor
package:build_resolvers/src/resolver.dart 73:17 PerActionResolver.libraryFor
package:build BuildStepImpl.inputLibrary
package:source_gen/src/builder.dart 66:33 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 491:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 300:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 489:23 _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 446:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 442:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 380:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] chopper_generator:chopper_generator on lib/app copy.dart (cached):

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
dart:core Object.noSuchMethod
package:analyzer/src/dart/analysis/driver.dart 634:23 AnalysisDriver.getLibraryByUri
package:build_resolvers/src/resolver.dart 104:20 AnalyzerResolver.libraryFor
package:build_resolvers/src/resolver.dart 73:17 PerActionResolver.libraryFor
package:build BuildStepImpl.inputLibrary
package:source_gen/src/builder.dart 66:33 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 491:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 300:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 489:23 _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 446:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 442:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 380:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] chopper_generator:chopper_generator on lib/Screens/Resources/resources copy.dart (cached):

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
dart:core Object.noSuchMethod
package:analyzer/src/dart/analysis/driver.dart 634:23 AnalysisDriver.getLibraryByUri
package:build_resolvers/src/resolver.dart 104:20 AnalyzerResolver.libraryFor
package:build_resolvers/src/resolver.dart 73:17 PerActionResolver.libraryFor
package:build BuildStepImpl.inputLibrary
package:source_gen/src/builder.dart 66:33 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 491:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 300:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 489:23 _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 446:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 442:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 380:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] chopper_generator:chopper_generator on lib/Screens/Resources/resources copy.dart (cached):

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
dart:core Object.noSuchMethod
package:analyzer/src/dart/analysis/driver.dart 634:23 AnalysisDriver.getLibraryByUri
package:build_resolvers/src/resolver.dart 104:20 AnalyzerResolver.libraryFor
package:build_resolvers/src/resolver.dart 73:17 PerActionResolver.libraryFor
package:build BuildStepImpl.inputLibrary
package:source_gen/src/builder.dart 66:33 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 491:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 300:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 489:23 _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 446:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 442:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 380:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] chopper_generator:chopper_generator on lib/Screens/Login/login_screen copy 2.dart (cached):

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
dart:core Object.noSuchMethod
package:analyzer/src/dart/analysis/driver.dart 634:23 AnalysisDriver.getLibraryByUri
package:build_resolvers/src/resolver.dart 104:20 AnalyzerResolver.libraryFor
package:build_resolvers/src/resolver.dart 73:17 PerActionResolver.libraryFor
package:build BuildStepImpl.inputLibrary
package:source_gen/src/builder.dart 66:33 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 491:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 300:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 489:23 _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 446:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 442:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 380:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] chopper_generator:chopper_generator on lib/Screens/Login/login_screen copy 2.dart (cached):

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
dart:core Object.noSuchMethod
package:analyzer/src/dart/analysis/driver.dart 634:23 AnalysisDriver.getLibraryByUri
package:build_resolvers/src/resolver.dart 104:20 AnalyzerResolver.libraryFor
package:build_resolvers/src/resolver.dart 73:17 PerActionResolver.libraryFor
package:build BuildStepImpl.inputLibrary
package:source_gen/src/builder.dart 66:33 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 491:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 300:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 489:23 _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 446:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 442:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 380:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] chopper_generator:chopper_generator on lib/Screens/Inventory/article copy 2.dart (cached):

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
dart:core Object.noSuchMethod
package:analyzer/src/dart/analysis/driver.dart 634:23 AnalysisDriver.getLibraryByUri
package:build_resolvers/src/resolver.dart 104:20 AnalyzerResolver.libraryFor
package:build_resolvers/src/resolver.dart 73:17 PerActionResolver.libraryFor
package:build BuildStepImpl.inputLibrary
package:source_gen/src/builder.dart 66:33 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 491:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 300:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 489:23 _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 446:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 442:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 380:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] chopper_generator:chopper_generator on lib/Screens/Inventory/article copy 2.dart (cached):

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
dart:core Object.noSuchMethod
package:analyzer/src/dart/analysis/driver.dart 634:23 AnalysisDriver.getLibraryByUri
package:build_resolvers/src/resolver.dart 104:20 AnalyzerResolver.libraryFor
package:build_resolvers/src/resolver.dart 73:17 PerActionResolver.libraryFor
package:build BuildStepImpl.inputLibrary
package:source_gen/src/builder.dart 66:33 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 491:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 300:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 489:23 _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 446:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 442:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 380:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] json_serializable:json_serializable on lib/app copy.dart (cached):

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
dart:core Object.noSuchMethod
package:analyzer/src/dart/analysis/driver.dart 634:23 AnalysisDriver.getLibraryByUri
package:build_resolvers/src/resolver.dart 104:20 AnalyzerResolver.libraryFor
package:build_resolvers/src/resolver.dart 73:17 PerActionResolver.libraryFor
package:build BuildStepImpl.inputLibrary
package:source_gen/src/builder.dart 66:33 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 491:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 300:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 489:23 _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 446:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 442:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 380:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] json_serializable:json_serializable on lib/app copy.dart (cached):

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
dart:core Object.noSuchMethod
package:analyzer/src/dart/analysis/driver.dart 634:23 AnalysisDriver.getLibraryByUri
package:build_resolvers/src/resolver.dart 104:20 AnalyzerResolver.libraryFor
package:build_resolvers/src/resolver.dart 73:17 PerActionResolver.libraryFor
package:build BuildStepImpl.inputLibrary
package:source_gen/src/builder.dart 66:33 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 491:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 300:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 489:23 _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 446:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 442:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 380:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] chopper_generator:chopper_generator on lib/Screens/Inventory/article copy.dart (cached):

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
dart:core Object.noSuchMethod
package:analyzer/src/dart/analysis/driver.dart 634:23 AnalysisDriver.getLibraryByUri
package:build_resolvers/src/resolver.dart 104:20 AnalyzerResolver.libraryFor
package:build_resolvers/src/resolver.dart 73:17 PerActionResolver.libraryFor
package:build BuildStepImpl.inputLibrary
package:source_gen/src/builder.dart 66:33 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 491:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 300:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 489:23 _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 446:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 442:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 380:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] chopper_generator:chopper_generator on lib/Screens/Inventory/article copy.dart (cached):

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
dart:core Object.noSuchMethod
package:analyzer/src/dart/analysis/driver.dart 634:23 AnalysisDriver.getLibraryByUri
package:build_resolvers/src/resolver.dart 104:20 AnalyzerResolver.libraryFor
package:build_resolvers/src/resolver.dart 73:17 PerActionResolver.libraryFor
package:build BuildStepImpl.inputLibrary
package:source_gen/src/builder.dart 66:33 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 491:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 300:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 489:23 _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 446:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 442:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 380:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] chopper_generator:chopper_generator on lib/Screens/Task/task copy.dart (cached):

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
dart:core Object.noSuchMethod
package:analyzer/src/dart/analysis/driver.dart 634:23 AnalysisDriver.getLibraryByUri
package:build_resolvers/src/resolver.dart 104:20 AnalyzerResolver.libraryFor
package:build_resolvers/src/resolver.dart 73:17 PerActionResolver.libraryFor
package:build BuildStepImpl.inputLibrary
package:source_gen/src/builder.dart 66:33 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 491:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 300:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 489:23 _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 446:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 442:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 380:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] chopper_generator:chopper_generator on lib/Screens/Task/task copy.dart (cached):

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
dart:core Object.noSuchMethod
package:analyzer/src/dart/analysis/driver.dart 634:23 AnalysisDriver.getLibraryByUri
package:build_resolvers/src/resolver.dart 104:20 AnalyzerResolver.libraryFor
package:build_resolvers/src/resolver.dart 73:17 PerActionResolver.libraryFor
package:build BuildStepImpl.inputLibrary
package:source_gen/src/builder.dart 66:33 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 491:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 300:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 489:23 _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 446:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 442:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 380:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] json_serializable:json_serializable on lib/Screens/Task/task copy.dart (cached):

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
dart:core Object.noSuchMethod
package:analyzer/src/dart/analysis/driver.dart 634:23 AnalysisDriver.getLibraryByUri
package:build_resolvers/src/resolver.dart 104:20 AnalyzerResolver.libraryFor
package:build_resolvers/src/resolver.dart 73:17 PerActionResolver.libraryFor
package:build BuildStepImpl.inputLibrary
package:source_gen/src/builder.dart 66:33 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 491:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 300:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 489:23 _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 446:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 442:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 380:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] json_serializable:json_serializable on lib/Screens/Task/task copy.dart (cached):

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
dart:core Object.noSuchMethod
package:analyzer/src/dart/analysis/driver.dart 634:23 AnalysisDriver.getLibraryByUri
package:build_resolvers/src/resolver.dart 104:20 AnalyzerResolver.libraryFor
package:build_resolvers/src/resolver.dart 73:17 PerActionResolver.libraryFor
package:build BuildStepImpl.inputLibrary
package:source_gen/src/builder.dart 66:33 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 491:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 300:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 489:23 _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 446:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 442:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 380:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] chopper_generator:chopper_generator on lib/Screens/Files/files copy 3.dart (cached):

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
dart:core Object.noSuchMethod
package:analyzer/src/dart/analysis/driver.dart 634:23 AnalysisDriver.getLibraryByUri
package:build_resolvers/src/resolver.dart 104:20 AnalyzerResolver.libraryFor
package:build_resolvers/src/resolver.dart 73:17 PerActionResolver.libraryFor
package:build BuildStepImpl.inputLibrary
package:source_gen/src/builder.dart 66:33 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 491:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 300:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 489:23 _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 446:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 442:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 380:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] chopper_generator:chopper_generator on lib/Screens/Files/files copy 3.dart (cached):

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
dart:core Object.noSuchMethod
package:analyzer/src/dart/analysis/driver.dart 634:23 AnalysisDriver.getLibraryByUri
package:build_resolvers/src/resolver.dart 104:20 AnalyzerResolver.libraryFor
package:build_resolvers/src/resolver.dart 73:17 PerActionResolver.libraryFor
package:build BuildStepImpl.inputLibrary
package:source_gen/src/builder.dart 66:33 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 491:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 300:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 489:23 _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 446:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 442:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 380:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] json_serializable:json_serializable on lib/Screens/Files/files copy 3.dart (cached):

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
dart:core Object.noSuchMethod
package:analyzer/src/dart/analysis/driver.dart 634:23 AnalysisDriver.getLibraryByUri
package:build_resolvers/src/resolver.dart 104:20 AnalyzerResolver.libraryFor
package:build_resolvers/src/resolver.dart 73:17 PerActionResolver.libraryFor
package:build BuildStepImpl.inputLibrary
package:source_gen/src/builder.dart 66:33 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 491:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 300:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 489:23 _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 446:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 442:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 380:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] json_serializable:json_serializable on lib/Screens/Files/files copy 3.dart (cached):

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
dart:core Object.noSuchMethod
package:analyzer/src/dart/analysis/driver.dart 634:23 AnalysisDriver.getLibraryByUri
package:build_resolvers/src/resolver.dart 104:20 AnalyzerResolver.libraryFor
package:build_resolvers/src/resolver.dart 73:17 PerActionResolver.libraryFor
package:build BuildStepImpl.inputLibrary
package:source_gen/src/builder.dart 66:33 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 491:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 300:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 489:23 _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 446:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 442:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 380:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] chopper_generator:chopper_generator on lib/Screens/Inventory/inventory copy 2.dart (cached):

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
dart:core Object.noSuchMethod
package:analyzer/src/dart/analysis/driver.dart 634:23 AnalysisDriver.getLibraryByUri
package:build_resolvers/src/resolver.dart 104:20 AnalyzerResolver.libraryFor
package:build_resolvers/src/resolver.dart 73:17 PerActionResolver.libraryFor
package:build BuildStepImpl.inputLibrary
package:source_gen/src/builder.dart 66:33 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 491:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 300:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 489:23 _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 446:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 442:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 380:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] chopper_generator:chopper_generator on lib/Screens/Inventory/inventory copy 2.dart (cached):

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
dart:core Object.noSuchMethod
package:analyzer/src/dart/analysis/driver.dart 634:23 AnalysisDriver.getLibraryByUri
package:build_resolvers/src/resolver.dart 104:20 AnalyzerResolver.libraryFor
package:build_resolvers/src/resolver.dart 73:17 PerActionResolver.libraryFor
package:build BuildStepImpl.inputLibrary
package:source_gen/src/builder.dart 66:33 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 491:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 300:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 489:23 _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 446:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 442:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 380:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] json_serializable:json_serializable on lib/Screens/Inventory/inventory copy 2.dart (cached):

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
dart:core Object.noSuchMethod
package:analyzer/src/dart/analysis/driver.dart 634:23 AnalysisDriver.getLibraryByUri
package:build_resolvers/src/resolver.dart 104:20 AnalyzerResolver.libraryFor
package:build_resolvers/src/resolver.dart 73:17 PerActionResolver.libraryFor
package:build BuildStepImpl.inputLibrary
package:source_gen/src/builder.dart 66:33 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 491:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 300:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 489:23 _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 446:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 442:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 380:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] json_serializable:json_serializable on lib/Screens/Inventory/inventory copy 2.dart (cached):

NoSuchMethodError: The getter 'element' was called on null.
Receiver: null
Tried calling: element
dart:core Object.noSuchMethod
package:analyzer/src/dart/analysis/driver.dart 634:23 AnalysisDriver.getLibraryByUri
package:build_resolvers/src/resolver.dart 104:20 AnalyzerResolver.libraryFor
package:build_resolvers/src/resolver.dart 73:17 PerActionResolver.libraryFor
package:build BuildStepImpl.inputLibrary
package:source_gen/src/builder.dart 66:33 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 491:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 300:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 489:23 _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 446:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 442:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 380:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 379:36 _SingleBuild._runBuilder
dart:async _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 377:40 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 325:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

[SEVERE] Build:
Failed after 1.4s
[SEVERE] Build:
Failed after 1.4s
[WARNING] run:
Skipping script run due to build failure
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)

#2 PackagesPassthroughCommand.runCommand (package:flutter_tools/src/commands/packages.dart:227:11)

#3 FlutterCommand.verifyThenRunCommand (package:flutter_tools/src/runner/flutter_command.dart:490:18)
#4 _asyncThenWrapperHelper. (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. (dart:async/future_impl.dart:552:7)
#12 _rootRun (dart:async/zone.dart:1124:13)
#13 _CustomZone.run (dart:async/zone.dart:1021:19)

[jakemac53]

One thing I noticed is all these files that are failing appear to have a space in the file names, if you remove those spaces does that solve the problem?

[jakemac53]

@greatbaedee

[greatbaedee]

@jakemac53

My article Dart code:

import 'package:json_annotation/json_annotation.dart';
part'article.g.dart';
@JsonSerializable()
class BaseResponse extends Object{

  BaseResponse({this.$id, this.ProjectId, this.ShipmentID, this.Message, this.NbrItems, this.Categories});


 final String $id;
  final  num ProjectId;
  final  num ShipmentID;
  final  String Message;
  final  num NbrItems;
  final List<Categoriess> Categories;

 
 factory BaseResponse.fromJson(Map<String, dynamic> json) => 
 _$BaseResponseFromJson(json);
}
@JsonSerializable()
class Categoriess extends Object{
   Categoriess({this.$id, this.CategoryName, this.Items});  


 final String $id;
 final String CategoryName;
  final List<Itemss> Items;

 
  factory Categoriess.fromJson(Map<String, dynamic> json) => 
  _$CategoriessFromJson(json);
}
@JsonSerializable()
class Itemss extends Object{

  Itemss({
    this.$id,
    this.ThisItemID,
    this.Quantity_Shipped,
    this.Item_Nbr,
    this.INVENTORY_ID,
    this.Item_Name,
    this.Item_Description,
    this.Sub_Category,
    this.Location,
    this.Weight,
    this.Dimensions_LxWxH_,
    this.Dim__Weight,
    this.Item_Note,
    this.ItemCost,
    this.ItemPrice,
    this.ItemMarkup,
    this.imagePath,
    this.FullSizeImage,
    this.MidSizeImage,
    this.Thumbnail,
    this.AdditionalItems
    });


 final String $id;
  final  num ThisItemID;
  final  num Quantity_Shipped;
   final String Item_Nbr;
  final  num INVENTORY_ID;
   final String Item_Name;
   final String Item_Description;
  final  String Sub_Category;
  final  String Location;
  final  String Weight;
  final  String Dimensions_LxWxH_;
  final  String Dim__Weight;
  final  String Item_Note;
  final  num ItemCost;
   final num ItemPrice;
  final  num ItemMarkup;
  final  String imagePath;
   final String FullSizeImage;
  final  String MidSizeImage;
 final   String Thumbnail;
  final  String AdditionalItems;

  
    factory Itemss.fromJson(Map<String, dynamic> json) => 
    _$ItemssFromJson(json);
}

My article.g.dart Dart code:

// GENERATED CODE - DO NOT MODIFY BY HAND

part of 'article.dart';

// **************************************************************************
// JsonSerializableGenerator
// **************************************************************************

BaseResponse _$BaseResponseFromJson(Map<String, dynamic> json) {
  return BaseResponse(
    $id: json[r'$id'] as String,
    ProjectId: json['ProjectId'] as num,
    ShipmentID: json['ShipmentID'] as num,
    Message: json['Message'] as String,
    NbrItems: json['NbrItems'] as num,
    Categories: (json['Categories'] as List)
        ?.map((e) =>
            e == null ? null : Categoriess.fromJson(e as Map<String, dynamic>))
        ?.toList(),
  );
}

Map<String, dynamic> _$BaseResponseToJson(BaseResponse instance) =>
    <String, dynamic>{
      r'$id': instance.$id,
      'ProjectId': instance.ProjectId,
      'ShipmentID': instance.ShipmentID,
      'Message': instance.Message,
      'NbrItems': instance.NbrItems,
      'Categories': instance.Categories,
    };

Categoriess _$CategoriessFromJson(Map<String, dynamic> json) {
  return Categoriess(
    $id: json[r'$id'] as String,
    CategoryName: json['CategoryName'] as String,
    Items: (json['Items'] as List)
        ?.map((e) =>
            e == null ? null : Itemss.fromJson(e as Map<String, dynamic>))
        ?.toList(),
  );
}

Map<String, dynamic> _$CategoriessToJson(Categoriess instance) =>
    <String, dynamic>{
      r'$id': instance.$id,
      'CategoryName': instance.CategoryName,
      'Items': instance.Items,
    };

Itemss _$ItemssFromJson(Map<String, dynamic> json) {
  return Itemss(
    $id: json[r'$id'] as String,
    ThisItemID: json['ThisItemID'] as num,
    Quantity_Shipped: json['Quantity_Shipped'] as num,
    Item_Nbr: json['Item_Nbr'] as String,
    INVENTORY_ID: json['INVENTORY_ID'] as num,
    Item_Name: json['Item_Name'] as String,
    Item_Description: json['Item_Description'] as String,
    Sub_Category: json['Sub_Category'] as String,
    Location: json['Location'] as String,
    Weight: json['Weight'] as String,
    Dimensions_LxWxH_: json['Dimensions_LxWxH_'] as String,
    Dim__Weight: json['Dim__Weight'] as String,
    Item_Note: json['Item_Note'] as String,
    ItemCost: json['ItemCost'] as num,
    ItemPrice: json['ItemPrice'] as num,
    ItemMarkup: json['ItemMarkup'] as num,
    imagePath: json['imagePath'] as String,
    FullSizeImage: json['FullSizeImage'] as String,
    MidSizeImage: json['MidSizeImage'] as String,
    Thumbnail: json['Thumbnail'] as String,
    AdditionalItems: json['AdditionalItems'] as String,
  );
}

Map<String, dynamic> _$ItemssToJson(Itemss instance) => <String, dynamic>{
      r'$id': instance.$id,
      'ThisItemID': instance.ThisItemID,
      'Quantity_Shipped': instance.Quantity_Shipped,
      'Item_Nbr': instance.Item_Nbr,
      'INVENTORY_ID': instance.INVENTORY_ID,
      'Item_Name': instance.Item_Name,
      'Item_Description': instance.Item_Description,
      'Sub_Category': instance.Sub_Category,
      'Location': instance.Location,
      'Weight': instance.Weight,
      'Dimensions_LxWxH_': instance.Dimensions_LxWxH_,
      'Dim__Weight': instance.Dim__Weight,
      'Item_Note': instance.Item_Note,
      'ItemCost': instance.ItemCost,
      'ItemPrice': instance.ItemPrice,
      'ItemMarkup': instance.ItemMarkup,
      'imagePath': instance.imagePath,
      'FullSizeImage': instance.FullSizeImage,
      'MidSizeImage': instance.MidSizeImage,
      'Thumbnail': instance.Thumbnail,
      'AdditionalItems': instance.AdditionalItems,
    };

My screen Dart code:

import 'dart:convert';

import 'package:flutter/material.dart';
import 'package:great/article.dart';
import 'package:http/http.dart'
as http;

class Inventory extends StatefulWidget {

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

class _InventoryState extends State < Inventory > {
  List < BaseResponse > pEShippingDetail = [];
  Future loadMessageList() async {
    http.Response response = await http.get('http://www.efwebservice.com/Public/api/ShipmentItems/GetShippingDetails?token=XE9QZEA5ZLRJ64FLO4210&projectid=1010408');
    //await Future.delayed(Duration(seconds: 3));

    String content = response.body;
    List collection = json.decode(content);
    List < BaseResponse > _messages = collection.map((json) => BaseResponse.fromJson(json)).toList();

    setState(() {
      pEShippingDetail = _messages;
    });
  }

  void initState() {
    loadMessageList();
    super.initState();

  }


  Widget project() {
    return Container(
      padding: EdgeInsets.all(18.0),
      child: Row(
        children: < Widget > [
          Expanded(
            child: Text('Inventory',
              textAlign: TextAlign.center,
              style: TextStyle(
                fontWeight: FontWeight.bold,
                fontSize: 18.0,
                color: Color(0xFFe16226)
              )
            ),
          ),
        ],
      ),
    );
  }


  Widget info() {
    return Expanded(
      child: Container(
        margin: EdgeInsets.only(top: 5.0, bottom: 5.0),
        padding: EdgeInsets.symmetric(horizontal: 10.0, vertical: 10.0),
        child: ListView.builder(
          itemCount: pEShippingDetail == null ? 0 : pEShippingDetail.length,
          itemBuilder: (context, i) {
            item_Name(){
              if(pEShippingDetail[0].Categories[i].CategoryName != null){
                return new Text(pEShippingDetail[0].Categories[i].CategoryName);
              }
            }
            // sub_Category(){
            //   if(pEShippingDetail[i].Sub_Category != null){
            //     return new Text(pEShippingDetail[i].Sub_Category);
            //   }
            // }
            // location(){
            //   if(pEShippingDetail[i].Location != null){
            //     return new Text(pEShippingDetail[i].Location);
            //   }
            // }
            // weight(){
            //   if(pEShippingDetail[i].Dim__Weight != null){
            //     return new Text(pEShippingDetail[i].Dim__Weight);
            //   }
            // }
            return GestureDetector(
              onTap: () {
                
              },
              child: Container(
              margin: const EdgeInsets.symmetric(
                vertical: 16.0,
                horizontal: 24.0
              ),
              child: new Stack(
                children: <Widget>[
                   new Container(
                    height: 124.0,
                    margin: new EdgeInsets.only(left: 46.0),
                    decoration: new BoxDecoration(
                      color: new Color(0xFFe16226),
                      shape: BoxShape.rectangle,
                      borderRadius: new BorderRadius.circular(8.0),
                      boxShadow: <BoxShadow>[
                        new BoxShadow(  
                          color: Colors.black12,
                          blurRadius: 10.0,
                          offset: new Offset(0.0, 10.0),
                        ),
                      ],
                    ),
                    child: new Container(
                      margin: new EdgeInsets.fromLTRB(76.0, 16.0, 16.0, 16.0),
                      constraints: new BoxConstraints.expand(),
                      child: new Column(
                        crossAxisAlignment: CrossAxisAlignment.start,
                        children: <Widget>[
                          new Container(height: 4.0),
                          item_Name(),
                          new Container(height: 10.0),
                          new Text(pEShippingDetail[0].Categories[i].CategoryName),
                          new Container(
                            margin: new EdgeInsets.symmetric(vertical: 8.0),
                            height: 2.0,
                            width: 18.0,
                            color: new Color(0xFF8A8A8D)
                          ),
                          new Row(
                            children: <Widget>[
                             // new Image.asset("assets/img/ic_distance.png", height: 12.0),
                              new Container(width: 8.0),
                              //location(),
                              Spacer(),
                              new Container(width: 24.0),
                              //new Image.asset("assets/img/ic_gravity.png", height: 12.0),
                              new Container(width: 8.0),
                              //weight()
                            ],
                          ),
                        ],
                      ),
                    ),
                  ),
                ],
              )
              ),
            );
          }
        ),
      ),
    );

  }


  @override
  Widget build(BuildContext context) {
    return  Scaffold(
        appBar: AppBar(
          backgroundColor: Color(0xFFe16226),
          centerTitle: true,
        ),
        body: Container(
          padding: EdgeInsets.all(10.0),
          child: Column(
            children: < Widget > [
              project(),
              info()
            ],
          ),
        ),
    );
  }
}

[greatbaedee]

@jakemac53 I created new flutter app and those are the code for each dart files and still the same error massage

[greatbaedee]

Thank you for some reason the error is gone.

[kevmoo]

Great to hear @greatbaedee !

[papalardo]

@natebosch I have run flutter pub upgrade and that didn't help.

$ flutter pub upgrade
Running "flutter pub upgrade" in greatbaedee... 9.1s

This works with me