Bad state: No element from TypeInferenceDependencyWalker.evaluate

[long1eu]

Analyzer Feedback from IntelliJ

Version information

• IDEA 182.2757.3
• 2.0.0-dev.56.0
• IU-182.2757.3, JRE 1.8.0_152-release-1226-b7x64 JetBrains s.r.o, OS Mac OS X(x86_64) v10.13.5 unknown, screens 1920x1200, 1920x1200

Exception

report.txt

Dart analysis server, SDK version 2.0.0-dev.56.0, server version 1.20.3, error: Analysis failed: /Users/long1eu/IdeaProjects/qwil-app/qwil_chat/lib/src/selectors/window.dart
Bad state: No element
#0      List.single (dart:core-patch/dart:core/growable_array.dart:221)
#1      ExprBuilder.build (package:analyzer/src/summary/expr_builder.dart:284)
#2      ExprBuilder._pushLocalFunctionReference (package:analyzer/src/summary/expr_builder.dart:635)
#3      ExprBuilder.build (package:analyzer/src/summary/expr_builder.dart:228)
#4      ExprTypeComputer.compute (package:analyzer/src/summary/link.dart:2271)
#5      TypeInferenceNode.evaluate (package:analyzer/src/summary/link.dart:4852)
#6      TypeInferenceDependencyWalker.evaluate (package:analyzer/src/summary/link.dart:4698)
#7      DependencyWalker.walk.strongConnect (package:front_end/src/dependency_walker.dart:149)
#8      DependencyWalker.walk (package:front_end/src/dependency_walker.dart:168)
#9      VariableElementForLink.inferredType (package:analyzer/src/summary/link.dart:5121)
#10     TopLevelVariableElementForLink.link (package:analyzer/src/summary/link.dart:4681)
#11     CompilationUnitElementInBuildUnit.link (package:analyzer/src/summary/link.dart:1499)
#12     LibraryElementInBuildUnit.link (package:analyzer/src/summary/link.dart:3517)
#13     LibraryCycleNode.link (package:analyzer/src/summary/link.dart:3189)
#14     LibraryCycleDependencyWalker.evaluate (package:analyzer/src/summary/link.dart:3111)

[victorvartan]

I'm having the same "Bad state: No element" problem on Windows both with Visual Studio Code and Android Studio:

Launching lib\main.dart on Android SDK built for x86 in debug mode...
Built build\app\outputs\apk\debug\app-debug.apk.
I/FlutterActivityDelegate( 4012): onResume setting current activity to this
D/EGL_emulation( 4012): eglCreateContext: 0xe8945f20: maj 2 min 0 rcv 2
D/EGL_emulation( 4012): eglMakeCurrent: 0xe8945f20: ver 2 0 (tinfo 0xe0de3fb0)
I/Choreographer( 4012): Skipped 272 frames!  The application may be doing too much work on its main thread.
D/EGL_emulation( 4012): eglMakeCurrent: 0xe2c04900: ver 2 0 (tinfo 0xcc4580e0)
I/OpenGLRenderer( 4012): Davey! duration=5383ms; Flags=1, IntendedVsync=118841678781, Vsync=123375011933, OldestInputEvent=9223372036854775807, NewestInputEvent=0, HandleInputStart=123390879130, AnimationStart=123390963570, PerformTraversalsStart=123391077400, DrawStart=123414527620, SyncQueued=123415938410, SyncStart=123447475490, IssueDrawCommandsStart=123447881840, SwapBuffers=123724802470, FrameCompleted=124256871160, DequeueBufferDuration=72848000, QueueBufferDuration=3795000,
D/        ( 4012): HostConnection::get() New Host Connection established 0xe0de58c0, tid 4037
D/EGL_emulation( 4012): eglMakeCurrent: 0xe8945f20: ver 2 0 (tinfo 0xe0dff110)
Bad state: No elementBad state: No elementBad state: No elementBad state: No elementBad state: No elementBad state: No element

And then if I restart debugging I get:

Unable to hot reload. No instance of Flutter is currently running.
Unhandled exception:
Bad state: No element
#0      List.first (dart:core-patch/dart:core/array.dart:165)
#1      HotRunner._reloadSources.<anonymous closure> (package:flutter_tools/src/run_hot.dart:579)
#2      _rootRunUnary (dart:async/zone.dart:1134)
#3      _CustomZone.runUnary (dart:async/zone.dart:1031)
#4      _FutureListener.handleValue (dart:async/future_impl.dart:129)
#5      Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:638)
#6      Future._propagateToListeners (dart:async/future_impl.dart:667)
#7      Future._completeWithValue (dart:async/future_impl.dart:482)
#8      Future._asyncComplete.<anonymous closure> (dart:async/future_impl.dart:512)
#9      _rootRun (dart:async/zone.dart:1126)
#10     _CustomZone.run (dart:async/zone.dart:1023)
#11     _CustomZone.bindCallback.<anonymous closure> (dart:async/zone.dart:949)
#12     _microtaskLoop (dart:async/schedule_microtask.dart:41)
#13     _startMicrotaskLoop (dart:async/schedule_microtask.dart:50)

The problem seems to be in packages\flutter_tools\lib\src\run_hot.dart apparently because some files are missing from the emulator, causing a list to be empty...
I tried some simple things like Wipe Data + Cold boot the emulator, deleted and re-added the emulator etc. and it's still not working.
The hot reload from the flutter run command has the same problem...
I also realized I was on the Flutter beta branch and switched to master but got the same errors there. Must be using the same Dart version. As this is just for a side project I hope I'll get some more spare time to dig deeper...

[devoncarew]

cc @stereotype441

[srawlins]

This was reproduced by the analyzer team recently at #38084, which has more context; please follow along there.

[srawlins]

Duplicate of #38084