Compiler Crashes when building example

[videah]

Creating build script, took 6619ms
[INFO] Initializing inputs
[INFO] Reading cached asset graph...
[INFO] Reading cached asset graph completed, took 457ms

[INFO] Checking for updates since last build...
[INFO] Checking for updates since last build completed, took 436ms

[INFO] Running build...
[INFO] Running build completed, took 266ms

[INFO] Caching finalized dependency graph...
[INFO] Caching finalized dependency graph completed, took 232ms

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

web/main.dart:
Internal Error: The compiler crashed when compiling this element.

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 (2.0.0), and

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

The compiler crashed: Crash when compiling null,
at character offset null:
NoSuchMethodError: The method 'accept' was called on null.
Receiver: null
Tried calling: accept(Instance of 'CloneVisitor')
#0      Object.noSuchMethod (dart:core/runtime/libobject_patch.dart:46:5)
#1      CloneVisitor.clone (package:kernel/clone.dart:66:34)
#2      KernelLibraryBuilder.finishForwarders (package:front_end/src/fasta/kernel/kernel_library_builder.dart:1056:45)
#3      SourceLoader.finishNoSuchMethodForwarders.<anonymous closure> (package:front_end/src/fasta/source/source_loader.dart:390:26)
#4      __InternalLinkedHashMap&_HashVMBase&MapMixin&_LinkedHashMapMixin.forEach (dart:collection/runtime/libcompact_hash.dart:363:8)
#5      SourceLoader.finishNoSuchMethodForwarders (package:front_end/src/fasta/source/source_loader.dart:388:14)
#6      KernelTarget.buildComponent.<anonymous closure> (package:front_end/src/fasta/kernel/kernel_target.dart:291:18)
<asynchronous suspension>
#7      withCrashReporting (package:front_end/src/fasta/deprecated_problems.dart:69:24)
<asynchronous suspension>
#8      KernelTarget.buildComponent (package:front_end/src/fasta/kernel/kernel_target.dart:286:12)
<asynchronous suspension>
#9      generateKernelInternal.<anonymous closure> (package:front_end/src/kernel_generator_impl.dart:152:42)
<asynchronous suspension>
#10     withCrashReporting (package:front_end/src/fasta/deprecated_problems.dart:69:24)
<asynchronous suspension>
#11     generateKernelInternal (package:front_end/src/kernel_generator_impl.dart:59:10)
<asynchronous suspension>
#12     compile.<anonymous closure> (package:front_end/src/api_unstable/dart2js.dart:70:32)
<asynchronous suspension>
#13     CompilerContext.runInContext.<anonymous closure>.<anonymous closure> (package:front_end/src/fasta/compiler_context.dart:120:46)
#14     new Future.sync (dart:async/future.dart:224:31)
#15     CompilerContext.runInContext.<anonymous closure> (package:front_end/src/fasta/compiler_context.dart:120:19)
#16     _rootRun (dart:async/zone.dart:1124:13)
#17     _CustomZone.run (dart:async/zone.dart:1021:19)
#18     _runZoned (dart:async/zone.dart:1516:10)
#19     runZoned (dart:async/zone.dart:1463:12)
#20     CompilerContext.runInContext (package:front_end/src/fasta/compiler_context.dart:119:12)
#21     CompilerContext.runWithOptions (package:front_end/src/fasta/compiler_context.dart:128:41)
#22     compile (package:front_end/src/api_unstable/dart2js.dart:68:46)
<asynchronous suspension>
#23     LibraryLoaderTask.loadLibraries.<anonymous closure> (file:///b/build/slave/dart-sdk-linux-stable/build/sdk/pkg/compiler/lib/src/library_loader.dart:68:27)
<asynchronous suspension>
#24     CompilerTask.measure (file:///b/build/slave/dart-sdk-linux-stable/build/sdk/pkg/compiler/lib/src/common/tasks.dart:63:51)
#25     LibraryLoaderTask.loadLibraries (file:///b/build/slave/dart-sdk-linux-stable/build/sdk/pkg/compiler/lib/src/library_loader.dart:46:12)
#26     Compiler.runInternal (file:///b/build/slave/dart-sdk-linux-stable/build/sdk/pkg/compiler/lib/src/compiler.dart:271:59)
<asynchronous suspension>
#27     Compiler.run.<anonymous closure>.<anonymous closure> (file:///b/build/slave/dart-sdk-linux-stable/build/sdk/pkg/compiler/lib/src/compiler.dart:216:38)
#28     new Future.sync (dart:async/future.dart:224:31)
#29     Compiler.run.<anonymous closure> (file:///b/build/slave/dart-sdk-linux-stable/build/sdk/pkg/compiler/lib/src/compiler.dart:216:20)
#30     CompilerTask.measureSubtask (file:///b/build/slave/dart-sdk-linux-stable/build/sdk/pkg/compiler/lib/src/common/tasks.dart:178:35)
#31     Compiler.run (file:///b/build/slave/dart-sdk-linux-stable/build/sdk/pkg/compiler/lib/src/compiler.dart:213:41)
#32     CompilerImpl.run.<anonymous closure>.<anonymous closure> (file:///b/build/slave/dart-sdk-linux-stable/build/sdk/pkg/compiler/lib/src/apiimpl.dart:148:22)
#33     _RootZone.runUnary (dart:async/zone.dart:1379:54)
#34     _FutureListener.handleValue (dart:async/future_impl.dart:129:18)
#35     Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:642:45)
#36     Future._propagateToListeners (dart:async/future_impl.dart:671:32)
#37     Future._completeWithValue (dart:async/future_impl.dart:486:5)
#38     Future._asyncComplete.<anonymous closure> (dart:async/future_impl.dart:516:7)
#39     _microtaskLoop (dart:async/schedule_microtask.dart:41:21)
#40     _startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5)
#41     _runPendingImmediateCallback (dart:isolate/runtime/libisolate_patch.dart:113:13)
#42     _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:166:5)


#0      Object.noSuchMethod (dart:core/runtime/libobject_patch.dart:46:5)
#1      CloneVisitor.clone (package:kernel/clone.dart:66:34)
#2      KernelLibraryBuilder.finishForwarders (package:front_end/src/fasta/kernel/kernel_library_builder.dart:1056:45)
#3      SourceLoader.finishNoSuchMethodForwarders.<anonymous closure> (package:front_end/src/fasta/source/source_loader.dart:390:26)
#4      __InternalLinkedHashMap&_HashVMBase&MapMixin&_LinkedHashMapMixin.forEach (dart:collection/runtime/libcompact_hash.dart:363:8)
#5      SourceLoader.finishNoSuchMethodForwarders (package:front_end/src/fasta/source/source_loader.dart:388:14)
#6      KernelTarget.buildComponent.<anonymous closure> (package:front_end/src/fasta/kernel/kernel_target.dart:291:18)
<asynchronous suspension>
#7      withCrashReporting (package:front_end/src/fasta/deprecated_problems.dart:69:24)
<asynchronous suspension>
#8      KernelTarget.buildComponent (package:front_end/src/fasta/kernel/kernel_target.dart:286:12)
<asynchronous suspension>
#9      generateKernelInternal.<anonymous closure> (package:front_end/src/kernel_generator_impl.dart:152:42)
<asynchronous suspension>
#10     withCrashReporting (package:front_end/src/fasta/deprecated_problems.dart:69:24)
<asynchronous suspension>
#11     generateKernelInternal (package:front_end/src/kernel_generator_impl.dart:59:10)
<asynchronous suspension>
#12     compile.<anonymous closure> (package:front_end/src/api_unstable/dart2js.dart:70:32)
<asynchronous suspension>
#13     CompilerContext.runInContext.<anonymous closure>.<anonymous closure> (package:front_end/src/fasta/compiler_context.dart:120:46)
#14     new Future.sync (dart:async/future.dart:224:31)
#15     CompilerContext.runInContext.<anonymous closure> (package:front_end/src/fasta/compiler_context.dart:120:19)
#16     _rootRun (dart:async/zone.dart:1124:13)
#17     _CustomZone.run (dart:async/zone.dart:1021:19)
#18     _runZoned (dart:async/zone.dart:1516:10)
#19     runZoned (dart:async/zone.dart:1463:12)
#20     CompilerContext.runInContext (package:front_end/src/fasta/compiler_context.dart:119:12)
#21     CompilerContext.runWithOptions (package:front_end/src/fasta/compiler_context.dart:128:41)
#22     compile (package:front_end/src/api_unstable/dart2js.dart:68:46)
<asynchronous suspension>
#23     LibraryLoaderTask.loadLibraries.<anonymous closure> (file:///b/build/slave/dart-sdk-linux-stable/build/sdk/pkg/compiler/lib/src/library_loader.dart:68:27)
<asynchronous suspension>
#24     CompilerTask.measure (file:///b/build/slave/dart-sdk-linux-stable/build/sdk/pkg/compiler/lib/src/common/tasks.dart:63:51)
#25     LibraryLoaderTask.loadLibraries (file:///b/build/slave/dart-sdk-linux-stable/build/sdk/pkg/compiler/lib/src/library_loader.dart:46:12)
#26     Compiler.runInternal (file:///b/build/slave/dart-sdk-linux-stable/build/sdk/pkg/compiler/lib/src/compiler.dart:271:59)
<asynchronous suspension>
#27     Compiler.run.<anonymous closure>.<anonymous closure> (file:///b/build/slave/dart-sdk-linux-stable/build/sdk/pkg/compiler/lib/src/compiler.dart:216:38)
#28     new Future.sync (dart:async/future.dart:224:31)
#29     Compiler.run.<anonymous closure> (file:///b/build/slave/dart-sdk-linux-stable/build/sdk/pkg/compiler/lib/src/compiler.dart:216:20)
#30     CompilerTask.measureSubtask (file:///b/build/slave/dart-sdk-linux-stable/build/sdk/pkg/compiler/lib/src/common/tasks.dart:178:35)
#31     Compiler.run (file:///b/build/slave/dart-sdk-linux-stable/build/sdk/pkg/compiler/lib/src/compiler.dart:213:41)
#32     CompilerImpl.run.<anonymous closure>.<anonymous closure> (file:///b/build/slave/dart-sdk-linux-stable/build/sdk/pkg/compiler/lib/src/apiimpl.dart:148:22)
#33     _RootZone.runUnary (dart:async/zone.dart:1379:54)
#34     _FutureListener.handleValue (dart:async/future_impl.dart:129:18)
#35     Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:642:45)
#36     Future._propagateToListeners (dart:async/future_impl.dart:671:32)
#37     Future._completeWithValue (dart:async/future_impl.dart:486:5)
#38     Future._asyncComplete.<anonymous closure> (dart:async/future_impl.dart:516:7)
#39     _microtaskLoop (dart:async/schedule_microtask.dart:41:21)
#40     _startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5)
#41     _runPendingImmediateCallback (dart:isolate/runtime/libisolate_patch.dart:113:13)
#42     _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:166:5)