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mravn-google opened this issue Apr 1, 2018 · 2 comments
Closed

Dart compiler exception with Flutter master #32729

mravn-google opened this issue Apr 1, 2018 · 2 comments
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@kmillikin
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crash Process exits with SIGSEGV, SIGABRT, etc. An unhandled exception is not a crash. legacy-area-front-end Legacy: Use area-dart-model instead. P1 A high priority bug; for example, a single project is unusable or has many test failures
Milestone
Dart2 Beta 3

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@mravn-google
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Snippet from flutter doctor -v

[✓] Flutter (Channel master, v0.2.7-pre.5, on Mac OS X 10.13.3 17D102, locale en-US)
    • Flutter version 0.2.7-pre.5 at /Users/mravn/github/flutter
    • Framework revision 68db514ec0 (32 hours ago), 2018-03-30 19:48:51 -0700
    • Engine revision c903c217a1
    • Dart version 2.0.0-dev.43.0.flutter-52afcba357

Error (the Dart compiler is invoked by Gradle calling into Flutter tooling):

$ flutter run
Running "flutter packages get" in example...                 1.1s
Launching lib/main.dart on Nexus 5X in debug mode...
Initializing gradle...                                       0.8s
Resolving dependencies...                                    0.9s
Running 'gradlew assembleDebug'...                               
compiler message: Unhandled exception:
Crash when compiling file:///Users/mravn/apps/music/example/lib/main.dart,
at character offset 764:
lib/main.dart:52:24: Internal problem: Unhandled () → void => #lib1::play(song, 1.0) in defaultTreeNode.
                onTap: () => play(song, 1.0),
                       ^
#0      internalProblem (package:front_end/src/fasta/problems.dart:30)
#1      unhandled (package:front_end/src/fasta/problems.dart:43)
#2      ConstnessEvaluator.defaultTreeNode (package:front_end/src/fasta/kernel/constness_evaluator.dart:112)
#3      TreeVisitor.defaultExpression (package:kernel/visitor.dart:140)
#4      TreeVisitor.visitFunctionExpression (package:kernel/visitor.dart:177)
#5      FunctionExpression.accept (package:kernel/ast.dart:3513)
#6      ConstnessEvaluator.visitConstructorInvocation (package:front_end/src/fasta/kernel/constness_evaluator.dart:175)
#7      ConstructorInvocation.accept (package:kernel/ast.dart:2983)
#8      ConstnessEvaluator.evaluate (package:front_end/src/fasta/kernel/constness_evaluator.dart:99)
#9      evaluateConstness (package:front_end/src/fasta/kernel/constness_evaluator.dart:466)
#10     BodyBuilder.inferConstness (package:front_end/src/fasta/kernel/body_builder.dart:710)
#11     BodyBuilder.finishFunction (package:front_end/src/fasta/kernel/body_builder.dart:697)
#12     DietListener.listenerFinishFunction (package:front_end/src/fasta/source/diet_listener.dart:684)
#13     DietListener.parseFunctionBody (package:front_end/src/fasta/source/diet_listener.dart:718)
#14     DietListener.buildFunctionBody (package:front_end/src/fasta/source/diet_listener.dart:565)
#15     DietListener.endMethod (package:front_end/src/fasta/source/diet_listener.dart:530)
#16     Parser.parseMethod (package:front_end/src/fasta/parser/parser.dart:3796)
#17     Parser.parseClassMemberImpl (package:front_end/src/fasta/parser/parser.dart:3670)
#18     Parser.parseClassBody (package:front_end/src/fasta/parser/parser.dart:3467)
#19     Parser.parseClass (package:front_end/src/fasta/parser/parser.dart:1699)
#20     Parser.parseClassOrNamedMixinApplication (package:front_end/src/fasta/parser/parser.dart:1659)
#21     Parser.parseTopLevelKeywordDeclaration (package:front_end/src/fasta/parser/parser.dart:535)
#22     Parser.parseTopLevelDeclarationImpl (package:front_end/src/fasta/parser/parser.dart:451)
#23     Parser.parseUnit (package:front_end/src/fasta/parser/parser.dart:335)
#24     SourceLoader.buildBody (package:front_end/src/fasta/source/source_loader.dart:198)
<asynchronous suspension>
#25     Loader.buildBodies (package:front_end/src/fasta/loader.dart:157)
<asynchronous suspension>
#26     KernelTarget.buildComponent (package:front_end/src/fasta/kernel/kernel_target.dart:292)
<asynchronous suspension>
#27     IncrementalCompiler.computeDelta.<anonymous closure> (package:front_end/src/fasta/incremental_compiler.dart:140)
<asynchronous suspension>
#28     CompilerContext.runInContext.<anonymous closure> (package:front_end/src/fasta/compiler_context.dart:105)
#29     _rootRun (dart:async/zone.dart:1126)
#30     _CustomZone.run (dart:async/zone.dart:1023)
#31     runZoned (dart:async/zone.dart:1501)
#32     CompilerContext.runInContext (package:front_end/src/fasta/compiler_context.dart:105)
#33     IncrementalCompiler.computeDelta (package:front_end/src/fasta/incremental_compiler.dart:61)
<asynchronous suspension>
#34     IncrementalCompiler.compile (package:vm/incremental_compiler.dart:33)
<asynchronous suspension>
#35     FrontendCompiler.compile.<anonymous closure> (package:vm/frontend_server.dart:254)
#36     new Future.<anonymous closure> (dart:async/future.dart:174)
#37     _rootRun (dart:async/zone.dart:1122)
#38     _CustomZone.run (dart:async/zone.dart:1023)
#39     _CustomZone.runGuarded (dart:async/zone.dart:925)
#40     _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:965)
#41     _rootRun (dart:async/zone.dart:1126)
#42     _CustomZone.run (dart:async/zone.dart:1023)
#43     _CustomZone.bindCallback.<anonymous closure> (dart:async/zone.dart:949)
#44     Timer._createTimer.<anonymous closure> (dart:async-patch/dart:async/timer_patch.dart:21)
#45     _Timer._runTimers (dart:isolate-patch/dart:isolate/timer_impl.dart:382)
#46     _Timer._handleMessage (dart:isolate-patch/dart:isolate/timer_impl.dart:416)
#47     _RawReceivePortImpl._handleMessage (dart:isolate-patch/dart:isolate/isolate_patch.dart:165)


#0      internalProblem (package:front_end/src/fasta/problems.dart:30)
#1      unhandled (package:front_end/src/fasta/problems.dart:43)
#2      ConstnessEvaluator.defaultTreeNode (package:front_end/src/fasta/kernel/constness_evaluator.dart:112)
#3      TreeVisitor.defaultExpression (package:kernel/visitor.dart:140)
#4      TreeVisitor.visitFunctionExpression (package:kernel/visitor.dart:177)
#5      FunctionExpression.accept (package:kernel/ast.dart:3513)
#6      ConstnessEvaluator.visitConstructorInvocation (package:front_end/src/fasta/kernel/constness_evaluator.dart:175)
#7      ConstructorInvocation.accept (package:kernel/ast.dart:2983)
#8      ConstnessEvaluator.evaluate (package:front_end/src/fasta/kernel/constness_evaluator.dart:99)
#9      evaluateConstness (package:front_end/src/fasta/kernel/constness_evaluator.dart:466)
#10     BodyBuilder.inferConstness (package:front_end/src/fasta/kernel/body_builder.dart:710)
#11     BodyBuilder.finishFunction (package:front_end/src/fasta/kernel/body_builder.dart:697)
#12     DietListener.listenerFinishFunction (package:front_end/src/fasta/source/diet_listener.dart:684)
#13     DietListener.parseFunctionBody (package:front_end/src/fasta/source/diet_listener.dart:718)
#14     DietListener.buildFunctionBody (package:front_end/src/fasta/source/diet_listener.dart:565)
#15     DietListener.endMethod (package:front_end/src/fasta/source/diet_listener.dart:530)
#16     Parser.parseMethod (package:front_end/src/fasta/parser/parser.dart:3796)
#17     Parser.parseClassMemberImpl (package:front_end/src/fasta/parser/parser.dart:3670)
#18     Parser.parseClassBody (package:front_end/src/fasta/parser/parser.dart:3467)
#19     Parser.parseClass (package:front_end/src/fasta/parser/parser.dart:1699)
#20     Parser.parseClassOrNamedMixinApplication (package:front_end/src/fasta/parser/parser.dart:1659)
#21     Parser.parseTopLevelKeywordDeclaration (package:front_end/src/fasta/parser/parser.dart:535)
#22     Parser.parseTopLevelDeclarationImpl (package:front_end/src/fasta/parser/parser.dart:451)
#23     Parser.parseUnit (package:front_end/src/fasta/parser/parser.dart:335)
#24     SourceLoader.buildBody (package:front_end/src/fasta/source/source_loader.dart:198)
<asynchronous suspension>
#25     Loader.buildBodies (package:front_end/src/fasta/loader.dart:157)
<asynchronous suspension>
#26     KernelTarget.buildComponent (package:front_end/src/fasta/kernel/kernel_target.dart:292)
<asynchronous suspension>
#27     IncrementalCompiler.computeDelta.<anonymous closure> (package:front_end/src/fasta/incremental_compiler.dart:140)
<asynchronous suspension>
#28     CompilerContext.runInContext.<anonymous closure> (package:front_end/src/fasta/compiler_context.dart:105)
#29     _rootRun (dart:async/zone.dart:1126)
#30     _CustomZone.run (dart:async/zone.dart:1023)
#31     runZoned (dart:async/zone.dart:1501)
#32     CompilerContext.runInContext (package:front_end/src/fasta/compiler_context.dart:105)
#33     IncrementalCompiler.computeDelta (package:front_end/src/fasta/incremental_compiler.dart:61)
<asynchronous suspension>
#34     IncrementalCompiler.compile (package:vm/incremental_compiler.dart:33)
<asynchronous suspension>
#35     FrontendCompiler.compile.<anonymous closure> (package:vm/frontend_server.dart:254)
#36     new Future.<anonymous closure> (dart:async/future.dart:174)
#37     _rootRun (dart:async/zone.dart:1122)
#38     _CustomZone.run (dart:async/zone.dart:1023)
#39     _CustomZone.runGuarded (dart:async/zone.dart:925)
#40     _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:965)
#41     _rootRun (dart:async/zone.dart:1126)
#42     _CustomZone.run (dart:async/zone.dart:1023)
#43     _CustomZone.bindCallback.<anonymous closure> (dart:async/zone.dart:949)
#44     Timer._createTimer.<anonymous closure> (dart:async-patch/dart:async/timer_patch.dart:21)
#45     _Timer._runTimers (dart:isolate-patch/dart:isolate/timer_impl.dart:382)
#46     _Timer._handleMessage (dart:isolate-patch/dart:isolate/timer_impl.dart:416)
#47     _RawReceivePortImpl._handleMessage (dart:isolate-patch/dart:isolate/isolate_patch.dart:165)

Compiler terminated unexpectedly on /Users/mravn/apps/music/example/lib/main.dart

FAILURE: Build failed with an exception.

* Where:
Script '/Users/mravn/github/flutter/packages/flutter_tools/gradle/flutter.gradle' line: 441

* What went wrong:
Execution failed for task ':app:flutterBuildDebug'.
> Process 'command '/Users/mravn/github/flutter/bin/flutter'' finished with non-zero exit value 1

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

* Get more help at https://help.gradle.org

BUILD FAILED in 5s
Gradle build failed: 1
$

main.dart:

import 'dart:async';

import 'package:flutter/material.dart';
import 'package:music/music.dart';

void main() {
  runApp(MaterialApp(
    home: Scaffold(
      appBar: AppBar(title: Text('Musical App')),
      body: Center(child: MusicPlayer()),
    ),
  ));
}

class MusicPlayer extends StatefulWidget {
  @override
  _MusicPlayerState createState() => _MusicPlayerState();
}

class _MusicPlayerState extends State<MusicPlayer> {
  Future<List<Song>> _songsFuture;

  @override
  void initState() {
    super.initState();
    _songsFuture = isLicensed().then<List<Song>>((bool isLicensed) {
      if (isLicensed) {
        return songs();
      } else {
        throw 'Game over\nInsert coins';
      }
    });
  }

  @override
  Widget build(BuildContext context) {
    return FutureBuilder<List<Song>>(
      future: _songsFuture,
      builder: (_, AsyncSnapshot<List<Song>> snapshot) {
        if (snapshot.hasError) {
          return Text(snapshot.error.toString());
        } else if (snapshot.hasData) {
          final List<Song> songs = snapshot.data;
          return ListView.builder(
            itemCount: songs.length,
            itemBuilder: (_, int index) {
              final Song song = songs[index];
              return ListTile(
                leading: CircleAvatar(child: Text('${index + 1}')),
                title: new Text(song.title),
                subtitle: new Text(song.artist),
                onTap: () => play(song, 1.0),
              );
            },
          );
        } else {
          return CircularProgressIndicator();
        }
      },
    );
  }
}

music.dart

import 'dart:async';

import 'package:flutter/services.dart';

const MethodChannel _channel = const MethodChannel('music');

Future<bool> isLicensed() async {
  final bool result = await _channel.invokeMethod('isLicensed');
  return result;
}

Future<List<Song>> songs() async {
  final List<dynamic> songs = await _channel.invokeMethod('getSongs');
  return songs.map(Song.fromJson).toList();
}

Future<void> play(Song song, double volume) async {
  try {
    await _channel.invokeMethod('play', <String, dynamic>{
      'song': song.id,
      'volume': volume,
    });
  } on PlatformException catch (e) {
    throw 'Unable to play ${song.title}: ${e.message}';
  }
}

class Song {
  Song(this.id, this.title, this.artist);

  final String id;
  final String title;
  final String artist;

  static Song fromJson(dynamic json) {
    return new Song(json['id'], json['title'], json['artist']);
  }
}

The code compiles nicely with an earlier version (Flutter beta):

[✓] Flutter (Channel beta, v0.2.3, on Mac OS X 10.13.3 17D102, locale en-US)
    • Flutter version 0.2.3 at /Users/mravn/github/flutter
    • Framework revision 5a58b36e36 (3 weeks ago), 2018-03-13 13:20:13 -0700
    • Engine revision e61bb9ac3a
    • Dart version 2.0.0-dev.35.flutter-290c576264
@dgrove dgrove added the legacy-area-front-end Legacy: Use area-dart-model instead. label Apr 2, 2018
@dgrove dgrove added this to the Dart2 Beta 3 milestone Apr 2, 2018
@dgrove dgrove added crash Process exits with SIGSEGV, SIGABRT, etc. An unhandled exception is not a crash. P1 A high priority bug; for example, a single project is unusable or has many test failures labels Apr 2, 2018
@dgrove
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dgrove commented Apr 2, 2018

Setting to P1 since it's a crash.

@JekCharlsonYu
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closed as duplicate of #32737

This was referenced Apr 3, 2018
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@kmillikin kmillikin

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crash Process exits with SIGSEGV, SIGABRT, etc. An unhandled exception is not a crash. legacy-area-front-end Legacy: Use area-dart-model instead. P1 A high priority bug; for example, a single project is unusable or has many test failures
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Dart2 Beta 3
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@kmillikin @dgrove @mravn-google @JekCharlsonYu