Build error in dart2js

[fidlip]

[SEVERE] build_web_compilers|entrypoint on web/main.dart:
Dart2Js finished with:

packages/KPMG_journey_frontend/src/utils/bpmn/viewer_options.dart:21:3:
Internal Error: The compiler crashed when compiling this element.
ViewerOptions.internal();
^
The compiler is broken.

When compiling the above element, the compiler crashed. It is not
possible to tell if this is caused by a problem in your program or
not. Regardless, the compiler should not crash.

The Dart team would greatly appreciate if you would take a moment to
report this problem at http://dartbug.com/new.

Please include the following information:

• the name and version of your operating system,

• the Dart SDK build number (2.1.0), and

• the entire message you see here (including the full stack trace
  below as well as the source location above).

The compiler crashed: RangeError (index): Invalid value: Valid value range is empty: 0
#0 List.[] (dart:core/runtime/libgrowable_array.dart:145:60)
#1 SsaLoadElimination.visitCreate. (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/ssa/optimize.dart:2752:54)
#2 CodegenWorldBuilderImpl.forEachInstanceField. (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/universe/codegen_world_builder.dart:674:55)
#3 JsToElementMapBase._forEachClassMember. (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/js_model/element_map_impl.dart:650:8)
#4 JClassEnvImpl.forEachMember. (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/js_model/env.dart:277:8)
#5 List.forEach (dart:core/runtime/libgrowable_array.dart:278:8)
#6 JClassEnvImpl.forEachMember (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/js_model/env.dart:276:14)
#7 JsToElementMapBase._forEachClassMember (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/js_model/element_map_impl.dart:649:9)
#8 JsElementEnvironment.forEachClassMember (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/js_model/element_map_impl.dart:1280:16)
#9 CodegenWorldBuilderImpl.forEachInstanceField (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/universe/codegen_world_builder.dart:672:25)
#10 SsaLoadElimination.visitCreate (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/ssa/optimize.dart:2740:36)
#11 HCreate.accept (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/ssa/nodes.dart:1586:39)
#12 SsaLoadElimination.visitBasicBlock (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/ssa/optimize.dart:2682:19)
#13 SsaLoadElimination.visitGraph (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/ssa/optimize.dart:2641:7)
#14 SsaOptimizerTask.optimize.runPhase. (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/ssa/optimize.dart:58:46)
#15 CompilerTask.measureSubtask (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/common/tasks.dart:178:35)
#16 SsaOptimizerTask.optimize.runPhase (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/ssa/optimize.dart:58:7)
#17 List.forEach (dart:core/runtime/libgrowable_array.dart:278:8)
#18 SsaOptimizerTask.optimize. (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/ssa/optimize.dart:114:14)
#19 CompilerTask.measure (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/common/tasks.dart:63:51)
#20 SsaOptimizerTask.optimize (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/ssa/optimize.dart:68:5)
#21 SsaFunctionCompiler.compile (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/ssa/ssa.dart:46:15)
#22 JavaScriptBackend.codegen (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/js_backend/backend.dart:692:26)
#23 KernelCodegenWorkItem.run (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/js_model/js_strategy.dart:1138:21)
#24 Compiler.emptyQueue..... (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/compiler.dart:434:70)
#25 CompilerTask.measureSubtask (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/common/tasks.dart:178:35)
#26 Compiler.emptyQueue.... (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/compiler.dart:434:32)
#27 CompilerTask.measureSubtask (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/common/tasks.dart:178:35)
#28 Compiler.emptyQueue... (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/compiler.dart:432:28)
#29 CompilerDiagnosticReporter.withCurrentElement (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/compiler.dart:755:15)
#30 Compiler.emptyQueue.. (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/compiler.dart:430:18)
#31 CodegenEnqueuer._forEach (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/js_backend/enqueuer.dart:240:12)
#32 CodegenEnqueuer.forEach (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/js_backend/enqueuer.dart:255:5)
#33 Compiler.emptyQueue. (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/compiler.dart:426:16)
#34 CompilerTask.measureSubtask (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/common/tasks.dart:178:35)
#35 Compiler.emptyQueue (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/compiler.dart:425:14)
#36 Compiler.processQueue. (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/compiler.dart:451:7)
#37 CompilerTask.measureSubtask (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/common/tasks.dart:178:35)
#38 Compiler.processQueue (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/compiler.dart:444:14)
#39 Compiler.generateJavaScriptCode (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/compiler.dart:370:5)
#40 Compiler.compileLoadedLibraries. (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/compiler.dart:395:9)
#41 CompilerTask.measureSubtask (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/common/tasks.dart:178:35)
#42 Compiler.compileLoadedLibraries (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/compiler.dart:389:14)
#43 Compiler.runInternal (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/compiler.dart:276:5)

#44 Compiler.run.. (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/compiler.dart:216:38)
#45 new Future.sync (dart:async/future.dart:224:31)
#46 Compiler.run. (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/compiler.dart:216:20)
#47 CompilerTask.measureSubtask (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/common/tasks.dart:178:35)
#48 Compiler.run (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/compiler.dart:213:41)
#49 CompilerImpl.run.. (file:///tmp/tmpqIBfjJ/dart-2.1.0/dart/pkg/compiler/lib/src/apiimpl.dart:148:22)
#50 _RootZone.runUnary (dart:async/zone.dart:1379:54)
#51 _FutureListener.handleValue (dart:async/future_impl.dart:129:18)
#52 Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:642:45)
#53 Future._propagateToListeners (dart:async/future_impl.dart:671:32)
#54 Future._completeWithValue (dart:async/future_impl.dart:486:5)
#55 Future._asyncComplete. (dart:async/future_impl.dart:516:7)
#56 _microtaskLoop (dart:async/schedule_microtask.dart:41:21)
#57 _startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5)
#58 _runPendingImmediateCallback (dart:isolate/runtime/libisolate_patch.dart:115:13)
#59 _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:172:5)

• Dart VM version: 2.1.0 (Unknown timestamp) on "linux_x64"
• Linux Ubuntu 20.04 LTS 64-bit
• Chrome

[sigmundch]

Thanks for reporting the issue.

To make it easier for us to investigate, could you provide a small code snippet that triggers this?

Also, Dart 2.1.0 is a few months old, does this issue show up on the latest stable release (2.10.1)?

[fidlip]

Thank you for reply. Project is very huge to realize what could really reproduce this error, but what I can read from message, it could be this class

@anonymous
@JS()
class ViewerOptions {
  Element container;
  dynamic width;
  dynamic height;
  Object moddleExtensions;
  List<Object> modules;
  List<Object> additionalModules;
  ViewerOptions.internal();

  factory ViewerOptions({Element container, dynamic width, dynamic height, Object moddleExtensions, List<Object> modules, List<Object> additionalModules}) {
    var options = ViewerOptions.internal();
    options.container = container;
    options.width = width;
    options.height = height;
    options.moddleExtensions = moddleExtensions;
    options.modules = modules;
    options.additionalModules = additionalModules;
    return options;
  }
}

Upgrade to newest SDK would be hard fight and unfortunately it is not on the agenda for our customer yet.

[fidlip]

I just tried to update at least to 2.2.0 and it seems the issue disappears. I am closing issue. Thank you.