NPE in ParameterAssignments lint #27545
Description
There are two issues here. One is that the lint contains a bug. The other is that a bug in a lint rule caused the GenerateLintsTask to fail.
Dart analysis server, SDK version 1.20.0-dev.10.1, server version 1.17.0, error: Task failed: GenerateLintsTask for source x.dart
Unexpected exception while performing GenerateLintsTask for source x.dart
#0 AnalysisTask._safelyPerform (package:analyzer/task/model.dart:351)
#1 AnalysisTask.perform (package:analyzer/task/model.dart:238)
#2 AnalysisDriver.performWorkItem (package:analyzer/src/task/driver.dart:284)
#3 AnalysisDriver.performAnalysisTask (package:analyzer/src/task/driver.dart:255)
#4 AnalysisContextImpl.performAnalysisTask. (package:analyzer/src/context/context.dart:1184)
#5 _PerformanceTagImpl.makeCurrentWhile (package:analyzer/src/generated/utilities_general.dart:212)
#6 AnalysisContextImpl.performAnalysisTask (package:analyzer/src/context/context.dart:1182)
#7 PerformAnalysisOperation.perform (package:analysis_server/src/operation/operation_analysis.dart:362)
#8 AnalysisServer.performOperation (package:analysis_server/src/analysis_server.dart:894)
#9 Future.Future. (dart:async/future.dart:118)
#10 _rootRun (dart:async/zone.dart:1146)
#11 _CustomZone.run (dart:async/zone.dart:1026)
#12 _CustomZone.runGuarded (dart:async/zone.dart:924)
#13 _CustomZone.bindCallback. (dart:async/zone.dart:951)
#14 _rootRun (dart:async/zone.dart:1150)
#15 _CustomZone.run (dart:async/zone.dart:1026)
#16 _CustomZone.runGuarded (dart:async/zone.dart:924)
#17 _CustomZone.bindCallback. (dart:async/zone.dart:951)
#18 Timer._createTimer. (dart:async-patch/timer_patch.dart:16)
#19 _Timer._runTimers (dart:isolate-patch/timer_impl.dart:385)
#20 _Timer._handleMessage (dart:isolate-patch/timer_impl.dart:414)
#21 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:148)
Caused by The null object does not have a getter 'parameters'.
NoSuchMethodError: method not found: 'parameters'
Receiver: null
Arguments: []
#0 Object._noSuchMethod (dart:core-patch/object_patch.dart:44)
#1 Object.noSuchMethod (dart:core-patch/object_patch.dart:47)
#2 _Visitor.visitMethodDeclaration (package:linter/src/rules/parameter_assignments.dart:81)
#3 DelegatingAstVisitor.visitMethodDeclaration. (package:analyzer/dart/ast/visitor.dart:597)
#4 List.forEach (dart:core-patch/growable_array.dart:258)
#5 DelegatingAstVisitor.visitMethodDeclaration (package:analyzer/dart/ast/visitor.dart:597)
#6 MethodDeclarationImpl.accept (package:analyzer/src/dart/ast/ast.dart:7226)
#7 NodeListImpl.accept (package:analyzer/src/dart/ast/ast.dart:7743)
#8 ClassDeclarationImpl.visitChildren (package:analyzer/src/dart/ast/ast.dart:1920)
#9 DelegatingAstVisitor.visitClassDeclaration (package:analyzer/dart/ast/visitor.dart:224)
#10 ClassDeclarationImpl.accept (package:analyzer/src/dart/ast/ast.dart:1852)
#11 NodeListImpl.accept (package:analyzer/src/dart/ast/ast.dart:7743)
#12 CompilationUnitImpl.visitChildren (package:analyzer/src/dart/ast/ast.dart:2452)
#13 DelegatingAstVisitor.visitCompilationUnit (package:analyzer/dart/ast/visitor.dart:252)
#14 CompilationUnitImpl.accept (package:analyzer/src/dart/ast/ast.dart:2445)
#15 GenerateLintsTask.internalPerform (package:analyzer/src/task/dart.dart:3262)
#16 AnalysisTask._safelyPerform (package:analyzer/task/model.dart:339)
#17 AnalysisTask.perform (package:analyzer/task/model.dart:238)
#18 AnalysisDriver.performWorkItem (package:analyzer/src/task/driver.dart:284)
#19 AnalysisDriver.performAnalysisTask (package:analyzer/src/task/driver.dart:255)
#20 AnalysisContextImpl.performAnalysisTask. (package:analyzer/src/context/context.dart:1184)
#21 _PerformanceTagImpl.makeCurrentWhile (package:analyzer/src/generated/utilities_general.dart:212)
#22 AnalysisContextImpl.performAnalysisTask (package:analyzer/src/context/context.dart:1182)
#23 PerformAnalysisOperation.perform (package:analysis_server/src/operation/operation_analysis.dart:362)
#24 AnalysisServer.performOperation (package:analysis_server/src/analysis_server.dart:894)
#25 Future.Future. (dart:async/future.dart:118)
#26 _rootRun (dart:async/zone.dart:1146)
#27 _CustomZone.run (dart:async/zone.dart:1026)
#28 _CustomZone.runGuarded (dart:async/zone.dart:924)
#29 _CustomZone.bindCallback. (dart:async/zone.dart:951)
#30 _rootRun (dart:async/zone.dart:1150)
#31 _CustomZone.run (dart:async/zone.dart:1026)
#32 _CustomZone.runGuarded (dart:async/zone.dart:924)
#33 _CustomZone.bindCallback. (dart:async/zone.dart:951)
#34 Timer._createTimer. (dart:async-patch/timer_patch.dart:16)
#35 _Timer._runTimers (dart:isolate-patch/timer_impl.dart:385)
#36 _Timer._handleMessage (dart:isolate-patch/timer_impl.dart:414)
#37 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:148)