analysis server crash

[gururangan77]

Analysis server version: 1.21.1
Dart SDK: 2.1.1-dev.0.1.flutter-ec86471ccc (Thu Jan 3 22:43:43 2019 +0000) on "windows_x64"
Android Studio 3.3.1 on Windows,

Stopped recognizing a particular type. Issue persisted even after multiple restarts, and crashed when used Ctrl+X to see if the problem goes away. The name of the type having problem is at the top of the stack trace below, pasting the type definition here if it helps..

class SwaraTarget{
static final int groupStartMarker = -1000;
static final int groupEndMarker = -2000;
final int group;
final int index;
final int swara;
final int ticks;
SwaraTarget(this.swara, {this.group, this.index, this.ticks} );
}

Exceptions
Exceptions from the analysis server.

Exception Exception: Element not found in summary: package:practice_app/main.dart;package:practice_app/graders.dart;SwaraTarget #0 SummaryResynthesizer.getElement (package:analyzer/src/summary/resynthesize.dart:314:9) #1 ElementHandle.actualElement (package:analyzer/src/dart/element/handle.dart:353:42) #2 ClassElementHandle.actualElement (package:analyzer/src/dart/element/handle.dart:34:43) #3 ClassElementHandle.type (package:analyzer/src/dart/element/handle.dart:113:29) #4 _ReferenceInfo._buildType (package:analyzer/src/summary/resynthesize.dart:1006:24) #5 _ReferenceInfo.type (package:analyzer/src/summary/resynthesize.dart:952:15) #6 _ReferenceInfo.buildType (package:analyzer/src/summary/resynthesize.dart:977:15) #7 _UnitResynthesizer.buildType (package:analyzer/src/summary/resynthesize.dart:1372:28) #8 _UnitResynthesizer.buildType.getTypeArgument (package:analyzer/src/summary/resynthesize.dart:1360:18) #9 _ReferenceInfo._buildTypeArguments (package:analyzer/src/summary/resynthesize.dart:1140:43) #10 _ReferenceInfo._buildType (package:analyzer/src/summary/resynthesize.dart:1008:25) #11 _ReferenceInfo.buildType (package:analyzer/src/summary/resynthesize.dart:978:15) #12 _UnitResynthesizer.buildType (package:analyzer/src/summary/resynthesize.dart:1372:28) #13 SummaryResynthesizerContext.resolveTypeRef (package:analyzer/src/summary/resynthesize.dart:472:30) #14 NonParameterVariableElementImpl.type (package:analyzer/src/dart/element/element.dart:6744:12) #15 PropertyInducingElementImpl.type (package:analyzer/src/dart/element/element.dart:7629:18) #16 DeclarationResolver.visitVariableDeclarationList (package:analyzer/src/generated/declaration_resolver.dart:474:56) #17 VariableDeclarationListImpl.accept (package:analyzer/src/dart/ast/ast.dart:11610:15) #18 FieldDeclarationImpl.visitChildren (package:analyzer/src/dart/ast/ast.dart:4395:17) #19 RecursiveAstVisitor.visitFieldDeclaration (package:analyzer/dart/ast/visitor.dart:835:10) #20 DeclarationResolver.visitFieldDeclaration (package:analyzer/src/generated/declaration_resolver.dart:195:11) #21 FieldDeclarationImpl.accept (package:analyzer/src/dart/ast/ast.dart:4390:49) #22 NodeListImpl.accept (package:analyzer/src/dart/ast/ast.dart:8366:20) #23 ClassDeclarationImpl.visitChildren (package:analyzer/src/dart/ast/ast.dart:1795:13) #24 RecursiveAstVisitor.visitClassDeclaration (package:analyzer/dart/ast/visitor.dart:691:10) #25 DeclarationResolver.visitClassDeclaration. (package:analyzer/src/generated/declaration_resolver.dart:87:13) #26 DeclarationResolver._walk (package:analyzer/src/generated/declaration_resolver.dart:541:13) #27 DeclarationResolver.visitClassDeclaration (package:analyzer/src/generated/declaration_resolver.dart:86:5) #28 ClassDeclarationImpl.accept (package:analyzer/src/dart/ast/ast.dart:1765:49) #29 NodeListImpl.accept (package:analyzer/src/dart/ast/ast.dart:8366:20) #30 CompilationUnitImpl.visitChildren (package:analyzer/src/dart/ast/ast.dart:2437:21) #31 RecursiveAstVisitor.visitCompilationUnit (package:analyzer/dart/ast/visitor.dart:715:10) #32 CompilationUnitImpl.accept (package:analyzer/src/dart/ast/ast.dart:2430:49) #33 DeclarationResolver.resolve (package:analyzer/src/generated/declaration_resolver.dart:49:12) #34 LibraryAnalyzer._resolveFile (package:analyzer/src/dart/analysis/library_analyzer.dart:597:31) #35 LibraryAnalyzer.analyzeSync. (package:analyzer/src/dart/analysis/library_analyzer.dart:118:7) #36 __InternalLinkedHashMap&_HashVMBase&MapMixin&_LinkedHashMapMixin.forEach (dart:collection/runtime/libcompact_hash.dart:367:8) #37 LibraryAnalyzer.analyzeSync (package:analyzer/src/dart/analysis/library_analyzer.dart:117:11) #38 LibraryAnalyzer.analyze. (package:analyzer/src/dart/analysis/library_analyzer.dart:91:14) #39 _PerformanceTagImpl.makeCurrentWhile (package:analyzer/src/generated/utilities_general.dart:258:15) #40 LibraryAnalyzer.analyze (package:analyzer/src/dart/analysis/library_analyzer.dart:90:43) #41 AnalysisDriver._computeAnalysisResult. (package:analyzer/src/dart/analysis/driver.dart:1431:63) #42 PerformanceLog.run (package:analyzer/src/dart/analysis/performance_logger.dart:34:15) #43 AnalysisDriver._computeAnalysisResult (package:analyzer/src/dart/analysis/driver.dart:1409:20) #44 AnalysisDriver.performWork (package:analyzer/src/dart/analysis/driver.dart:1203:17) #45 AnalysisDriverScheduler._run (package:analyzer/src/dart/analysis/driver.dart:2116:24) #46 AnalysisDriverScheduler.start (package:analyzer/src/dart/analysis/driver.dart:2057:5) #47 new AnalysisServer (package:analysis_server/src/analysis_server.dart:236:29) #48 SocketServer.createAnalysisServer (package:analysis_server/src/socket_server.dart:79:26) #49 StdioAnalysisServer.serveStdio (package:analysis_server/src/server/stdio_server.dart:37:18) #50 Driver.startAnalysisServer. (package:analysis_server/src/server/driver.dart:519:21) #51 _rootRun (dart:async/zone.dart:1124:13) #52 _CustomZone.run (dart:async/zone.dart:1021:19) #53 _runZoned (dart:async/zone.dart:1516:10) #54 runZoned (dart:async/zone.dart:1463:12) #55 Driver._captureExceptions (package:analysis_server/src/server/driver.dart:585:12) #56 Driver.startAnalysisServer (package:analysis_server/src/server/driver.dart:517:7) #57 Driver.start (package:analysis_server/src/server/driver.dart:414:7) #58 main (file:///E:/b/rr/tmpqlvyqu/w/src/third_party/dart/pkg/analysis_server/bin/server.dart:12:11) #59 _AsyncAwaitCompleter.start (dart:async/runtime/libasync_patch.dart:49:6) #60 main (file:///E:/b/rr/tmpqlvyqu/w/src/third_party/dart/pkg/analysis_server/bin/server.dart:10:10) #61 _startIsolate. (dart:isolate/runtime/libisolate_patch.dart:287:32) #62 _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:171:12)

[gururangan77]

analysis_options.yaml
analyzer:
strong-mode:
implicit-casts: false
implicit-dynamic: false
errors:
exclude:
- flutter/**
- lib/api/*.dart

[gururangan77]

Turns out it was due to a function declaration returning SwaraTarget[] instead of List<>. This threw the analyzer off, strangely none of the errors it generated pointed me to the above problematic statement.

[stereotype441]

Duplicate of #35620