Compiler crashes when Future is created and awaited later (during debug) #53637

bernardolansing · 2023-09-27T22:50:21Z

I am developing an Android app with Flutter. This afternoon, I started to receive this error:

Compiler crash

Unhandled exception:
invalid input
#0 parseDefinitionTypes (package:front_end/src/api_prototype/expression_compilation_tools.dart:110:43)
#1 #2 #3 #4 #5 #6 #7 #8 #9 #10 #11 #12 #13 #14 #15 #16 #17 #18 #19 #20 #21 #22 #23 #24 #25 #26 #27 #28 #29 #30 #31 #32 #33 #34 #35 #36 #37 #38 #39 #40 #41 #42 #43 #44 the Dart compiler exited unexpectedly.
the Dart compiler exited unexpectedly. createDefinitionsWithTypes (package:front_end/src/api_prototype/expression_compilation_tools.dart:32:7)
IncrementalCompiler.compileExpression (package:vm/incremental_compiler.dart:219:50)
FrontendCompiler.compileExpression (package:frontend_server/frontend_server.dart:981:45)
listenAndCompile. (package:frontend_server/frontend_server.dart:1452:26)
_RootZone.runUnaryGuarded (dart:async/zone.dart:1594:10)
_BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:339:11)
_BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)
_SinkTransformerStreamSubscription._add (dart:async/stream_transformers.dart:63:11)
_EventSinkWrapper.add (dart:async/stream_transformers.dart:13:11)
_StringAdapterSink.add (dart:convert/string_conversion.dart:228:11)
_LineSplitterSink._addLines (dart:convert/line_splitter.dart:164:13)
_LineSplitterSink.addSlice (dart:convert/line_splitter.dart:131:7)
StringConversionSink.add (dart:convert/string_conversion.dart:39:5)
_SinkTransformerStreamSubscription._handleData (dart:async/stream_transformers.dart:111:24)
_RootZone.runUnaryGuarded (dart:async/zone.dart:1594:10)
_BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:339:11)
_BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)
_SinkTransformerStreamSubscription._add (dart:async/stream_transformers.dart:63:11)
_EventSinkWrapper.add (dart:async/stream_transformers.dart:13:11)
_StringAdapterSink.add (dart:convert/string_conversion.dart:228:11)
_StringAdapterSink.addSlice (dart:convert/string_conversion.dart:233:7)
_Utf8ConversionSink.addSlice (dart:convert/string_conversion.dart:307:20)
_Utf8ConversionSink.add (dart:convert/string_conversion.dart:300:5)
_ConverterStreamEventSink.add (dart:convert/chunked_conversion.dart:69:18)
_SinkTransformerStreamSubscription._handleData (dart:async/stream_transformers.dart:111:24)
_RootZone.runUnaryGuarded (dart:async/zone.dart:1594:10)
_BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:339:11)
_BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)
_SyncStreamControllerDispatch._sendData (dart:async/stream_controller.dart:784:19)
_StreamController._add (dart:async/stream_controller.dart:658:7)
_StreamController.add (dart:async/stream_controller.dart:606:5)
_Socket._onData (dart:io-patch/socket_patch.dart:2447:41)
_RootZone.runUnaryGuarded (dart:async/zone.dart:1594:10)
_BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:339:11)
_BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)
_SyncStreamControllerDispatch._sendData (dart:async/stream_controller.dart:784:19)
_StreamController._add (dart:async/stream_controller.dart:658:7)
_StreamController.add (dart:async/stream_controller.dart:606:5)
new _RawSocket. (dart:io-patch/socket_patch.dart:1936:33)
_NativeSocket.issueReadEvent.issue (dart:io-patch/socket_patch.dart:1379:14)
_microtaskLoop (dart:async/schedule_microtask.dart:40:21)
_startMicrotaskLoop (dart:async/schedule_microtask.dart:49:5)
_runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:123:13)
_RawReceivePort._handleMessage (dart:isolate-patch/isolate_patch.dart:190:5)

After some debugging, I found out that this crash only happened when I had the debugger on and I created a Future that was only awaited in a later moment of the code. Check this:

Future<void> update() async {
    // userData is a Map that comes from the database
    final anymalsFuture = _updateOwnedAnymals(userData);

    completeName = userData['completeName'];
    cpf = userData['cpf'];
    privacyPolicyAgreement = userData['privacyPolicyAgreement'] != null
        ? PrivacyPolicyAgreement.fromMap(userData['privacyPolicyAgreement'])
        : null;
    if (userData['messagingRegistrationTokens'] != null) {
      messagingRegistrationTokens = List<Map>.from(userData['messagingRegistrationTokens'])
          .map(MessagingRegistrationTokenEntry.fromEntry)
          .toList(growable: false);
    }
    else { messagingRegistrationTokens = []; }
    _updateOrders(userData);
    _updateOwnedCredits(userData);
    _updatePurchases(userData);

    await anymalsFuture;
    _lastUpdated = DateTime.now().millisecondsSinceEpoch;
  }

If the debugger pauses between the creation of the anymalsFuture and its latter await, the compiler will crash. For example, if I put a breakpoint in the line completeName = userData['completeName'];, the crash will happen somewhat 5 seconds after the pause, or when I mouse hover any variable. I am using Android Studio and when I mouse hover any name, the IDE will try to search that name value (if it is a variable) or its documentation (if it is a class/function). Either way, Dart crashes instantly.

If I just awaited that future from the beggining, everything runs normally. I tried to reproduce that with a simple Future.delayed, but no crash occured. This is the _updateOwnedAnymals:

Future<void> _updateOwnedAnymals(Map<String, dynamic> userData) async {
    final ownedSerialKeys = List<String>.from(userData['ownedAnymals']);

    // remove anymals that are not owned by user anymore
    ownedAnymals.removeWhere((anymal) => ! ownedSerialKeys.contains(anymal.serialKey));

    // list of serial keys of anymals that need to be created. Does not include anymals that were created already
    final anymalsToCreate = ownedSerialKeys
        .where((serial) => ! ownedAnymals.any((anymal) => anymal.serialKey == serial));
    final createdAnymals = await Future.wait(anymalsToCreate.map(Anymal.createFromSerial));
    ownedAnymals.addAll(createdAnymals);
}

And the Anymal.createFromSerial is below. Actually, this is supposed to be a constructor. I'm aware that this code is awful; by the time I wrote it I was very newbie. Even so, I don't believe it is so bad that it would crash the compiler.

static Future<Anymal> createFromSerial(String serial) async {
    final anymal = Anymal(serial);

    final infoSnapshot = await FirebaseFirestore.instance.collection('anymals').doc(serial).get();
    final info = infoSnapshot.data();
    if (info == null) { throw 'Could not fetch information on any+ of serial $serial'; }
    anymal._name = info['name'];
    anymal._firstConnected = info['firstConnected'];
    anymal.species = AnymalSpecies.values.byName(info['species']);
    anymal._ownedAddonsCodes = (info['addons'] as List<Object?>).map((addon) => addon?.toString() ?? '').toList();

    anymal.network = NetworkModule(anymal._dbHandler);
    anymal.alarmManager = AlarmModule(anymal._dbHandler);
    anymal.addons = AddonModule(anymal._dbHandler);
    anymal.eyeSettings = EyeSettings(anymal._dbHandler);
    anymal.playback = Playback(anymal._dbHandler);
    anymal.parrotMode = ParrotModeModule(anymal._dbHandler);

    return anymal;
  }

Unfortunately, this is a comercial software so I won't be able to share much more than this. I hope this report could be useful.

dart info

#### General info

Dart 3.1.3 (stable) (Tue Sep 26 14:25:13 2023 +0000) on "linux_x64"
on linux / Linux 5.15.0-84-generic Updated bundled libraries will not cause a recompilation of dependent files. #93~20.04.1-Ubuntu SMP Wed Sep 6 16:15:40 UTC 2023
locale is en_US.UTF-8

Project info

sdk constraint: '>=2.19.6 <3.0.0'
dependencies: animations, app_settings, async, cloud_firestore, collection, firebase_auth, firebase_core, firebase_database, firebase_messaging, flutter, flutter_colorpicker, flutter_webrtc, http, qr_code_scanner, skeleton_loader, webview_flutter
dev_dependencies: flutter_lints, flutter_test

Process info

Memory	CPU	Elapsed time	Command line
33 MB	0.0%	01:09:01	dart devtools --no-launch-browser
32 MB	0.0%	01:06:30	dart devtools --no-launch-browser
34 MB	0.0%	21:45	dart devtools --no-launch-browser
34 MB	0.0%	19:20	dart devtools --no-launch-browser
33 MB	0.0%	14:15	dart devtools --no-launch-browser
33 MB	0.0%	11:04	dart devtools --no-launch-browser
38 MB	0.3%	01:39	dart devtools --no-launch-browser
583 MB	1.0%	45:43	dart language-server --client-id=Android-Studio --client-version=AI-221.6008.13 --protocol=analyzer
75 MB	0.4%	46:48	flutter_tools.snapshot daemon

The text was updated successfully, but these errors were encountered:

npavelko · 2023-09-29T12:32:02Z

I have the same problem

angelru · 2023-10-03T10:10:18Z

The same issue:

Unhandled exception:
invalid input
#0      parseDefinitionTypes (package:front_end/src/api_prototype/expression_compilation_tools.dart:110:43)
#1      createDefinitionsWithTypes (package:front_end/src/api_prototype/expression_compilation_tools.dart:32:7)
#2      IncrementalCompiler.compileExpression (package:vm/incremental_compiler.dart:219:50)
#3      FrontendCompiler.compileExpression (package:frontend_server/frontend_server.dart:981:45)

#4      listenAndCompile.<anonymous closure> (package:frontend_server/frontend_server.dart:1452:26)
#5      _RootZone.runUnaryGuarded (dart:async/zone.dart:1594:10)
#6      _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:339:11)
#7      _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)
#8      _SinkTransformerStreamSubscription._add (dart:async/stream_transformers.dart:63:11)
#9      _EventSinkWrapper.add (dart:async/stream_transformers.dart:13:11)
#10     _StringAdapterSink.add (dart:convert/string_conversion.dart:228:11)

#11     _LineSplitterSink._addLines (dart:convert/line_splitter.dart:164:13)
#12     _LineSplitterSink.addSlice (dart:convert/line_splitter.dart:131:7)

Avataromvatar · 2023-10-04T09:39:20Z

The same trouble, but the error is a little different. It always works when you hover over a variable at a breakpoint (in the Future) to look at it. I also tried to repeat the problem in a simple test, but it didn't work out. This started happening quite recently after the update.

Unhandled exception:
FormatException: Invalid radix-10 number (at character 1)
null
^

#0 int._handleFormatError (dart:core-patch/integers_patch.dart:126:5)
#1 int._parseRadix (dart:core-patch/integers_patch.dart:137:16)
#2 int._parse (dart:core-patch/integers_patch.dart:98:12)
#3 int.parse (dart:core-patch/integers_patch.dart:60:12)
#4 parseDefinitionTypes (package:front_end/src/api_prototype/expression_compilation_tools.dart:113:36)
#5 createDefinitionsWithTypes (package:front_end/src/api_prototype/expression_compilation_tools.dart:32:7)
#6 IncrementalCompiler.compileExpression (package:vm/incremental_compiler.dart:219:50)
#7 FrontendCompiler.compileExpression (package:frontend_server/frontend_server.dart:981:45)
#8 listenAndCompile. (package:frontend_server/frontend_server.dart:1452:26)
#9 _RootZone.runUnaryGuarded (dart:async/zone.dart:1594:10)
#10 _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:339:11)
#11 _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)
#12 _SinkTransformerStreamSubscription._add (dart:async/stream_transformers.dart:63:11)
#13 _EventSinkWrapper.add (dart:async/stream_transformers.dart:13:11)
#14 _StringAdapterSink.add (dart:convert/string_conversion.dart:228:11)
#15 _LineSplitterSink._addLines (dart:convert/line_splitter.dart:164:13)
#16 _LineSplitterSink.addSlice (dart:convert/line_splitter.dart:131:7)
#17 StringConversionSink.add (dart:convert/string_conversion.dart:39:5)
#18 _SinkTransformerStreamSubscription._handleData (dart:async/stream_transformers.dart:111:24)
#19 _RootZone.runUnaryGuarded (dart:async/zone.dart:1594:10)
#20 _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:339:11)
#21 _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)
#22 _SinkTransformerStreamSubscription._add (dart:async/stream_transformers.dart:63:11)
#23 _EventSinkWrapper.add (dart:async/stream_transformers.dart:13:11)
#24 _StringAdapterSink.add (dart:convert/string_conversion.dart:228:11)
#25 _StringAdapterSink.addSlice (dart:convert/string_conversion.dart:233:7)
#26 _Utf8ConversionSink.addSlice (dart:convert/string_conversion.dart:307:20)
#27 _Utf8ConversionSink.add (dart:convert/string_conversion.dart:300:5)
#28 _ConverterStreamEventSink.add (dart:convert/chunked_conversion.dart:69:18)
#29 _SinkTransformerStreamSubscription._handleData (dart:async/stream_transformers.dart:111:24)
#30 _RootZone.runUnaryGuarded (dart:async/zone.dart:1594:10)
#31 _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:339:11)
#32 _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)
#33 _SyncStreamControllerDispatch._sendData (dart:async/stream_controller.dart:784:19)
#34 _StreamController._add (dart:async/stream_controller.dart:658:7)
#35 _StreamController.add (dart:async/stream_controller.dart:606:5)
#36 _Socket._onData (dart:io-patch/socket_patch.dart:2447:41)
#37 _RootZone.runUnaryGuarded (dart:async/zone.dart:1594:10)
#38 _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:339:11)
#39 _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)
#40 _SyncStreamControllerDispatch._sendData (dart:async/stream_controller.dart:784:19)
#41 _StreamController._add (dart:async/stream_controller.dart:658:7)
#42 _StreamController.add (dart:async/stream_controller.dart:606:5)
#43 new _RawSocket. (dart:io-patch/socket_patch.dart:1936:33)
#44 _NativeSocket.issueReadEvent.issue (dart:io-patch/socket_patch.dart:1379:14)
#45 _microtaskLoop (dart:async/schedule_microtask.dart:40:21)
#46 _startMicrotaskLoop (dart:async/schedule_microtask.dart:49:5)
#47 _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:123:13)
#48 _RawReceivePort._handleMessage (dart:isolate-patch/isolate_patch.dart:190:5)
the Dart compiler exited unexpectedly.
the Dart compiler exited unexpectedly.

Flutter (Channel stable, 3.13.6, on macOS 14.0 23A344 darwin-arm64, locale en-RU)
• Flutter version 3.13.6 on channel stable at *
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision ead455963c (7 days ago), 2023-09-26 18:28:17 -0700
• Engine revision a794cf2681
• Dart version 3.1.3
• DevTools version 2.25.0

[✓] Android toolchain - develop for Android devices (Android SDK version 33.0.0)
• Android SDK ***
• Platform android-33, build-tools 33.0.0
• Java binary at: /Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 11.0.15+0-b2043.56-8887301)
• All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 15.0)
• Xcode at ***
• Build 15A240d
• CocoaPods version 1.11.3

[✓] Chrome - develop for the web
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2022.1)
• Android Studio at /Applications/Android Studio.app/Contents
• Flutter plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/9212-flutter
• Dart plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/6351-dart
• Java version OpenJDK Runtime Environment (build 11.0.15+0-b2043.56-8887301)

[✓] VS Code (version 1.82.3)
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension version 3.74.0

JCKodel · 2023-10-05T19:00:10Z

Maybe same here? Dart-Code/Dart-Code#4776

But my code doesn't have any futures at that point (but indeed had some Future<void> stacked on a List to be awaited later with a await Future.wait(list)).

At that specific point in the video, there were no async code executed (at least on my code base).

johnniwinther · 2023-10-13T07:30:43Z

Likely related to #53382

johnniwinther · 2023-10-13T07:39:03Z

cc @derekxu16

derekxu16 · 2023-10-13T22:11:25Z

If I run the following Flutter app on an Android emulator using Flutter 3.13.7, set a breakpoint to pause at print(m); and then hover over m, the compiler crashes. If I do the same thing using Flutter from the main channel, the compiler does not crash. So, I think this is a problem you already fixed, @johnniwinther.

import 'dart:collection' show HashMap;

Future<void> _update(Map<String, dynamic> m) async {}

Future<void> main() async {
  final m = HashMap<String, dynamic>();
  final f = _update(m);
  print(m);
  await f;
}

johnniwinther · 2023-10-16T07:47:14Z

Thanks @derekxu16

keertip added the area-front-end Use area-front-end for front end / CFE / kernel format related issues. label Sep 28, 2023

johnniwinther added area-vm Use area-vm for VM related issues, including code coverage, and the AOT and JIT backends. cfe-expression-compilation Issues related to expression compilation in the CFE labels Oct 13, 2023

johnniwinther closed this as completed Oct 16, 2023

johnniwinther mentioned this issue Oct 16, 2023

the Dart compiler exited unexpectedly, if I place a breakpoint inside a certain function #53382

Closed

DanTup mentioned this issue Jan 10, 2024

Flutter app/Dart compiler crashing when hovering a variable in a debugger breakpoint Dart-Code/Dart-Code#4776

Closed

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Compiler crashes when Future is created and awaited later (during debug) #53637

Compiler crashes when Future is created and awaited later (during debug) #53637

bernardolansing commented Sep 27, 2023

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npavelko commented Sep 29, 2023

angelru commented Oct 3, 2023 •

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Avataromvatar commented Oct 4, 2023

JCKodel commented Oct 5, 2023 •

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johnniwinther commented Oct 13, 2023

johnniwinther commented Oct 13, 2023

derekxu16 commented Oct 13, 2023

johnniwinther commented Oct 16, 2023

Compiler crashes when Future is created and awaited later (during debug) #53637

Compiler crashes when Future is created and awaited later (during debug) #53637

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bernardolansing commented Sep 27, 2023

Project info

Process info

npavelko commented Sep 29, 2023

angelru commented Oct 3, 2023 • edited Loading

Avataromvatar commented Oct 4, 2023

JCKodel commented Oct 5, 2023 • edited Loading

johnniwinther commented Oct 13, 2023

johnniwinther commented Oct 13, 2023

derekxu16 commented Oct 13, 2023

johnniwinther commented Oct 16, 2023

angelru commented Oct 3, 2023 •

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JCKodel commented Oct 5, 2023 •

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