Dart 2 runtime failure in package

[keertip]

When running package webdriver tests, see the following error

type 'List<dynamic>' is not a subtype of type 'List<String>' of 'value' where...
type 'List<dynamic>' is not a subtype of type 'List<String>' of 'value' where
  List is from dart:core
  List is from dart:core
  String is from dart:core
dart:collection                                                                                         __InternalLinkedHashMap&_HashVMBase&MapMixin&_LinkedHashMapMixin.[]=
/sync_http/lib/src/sync_http.dart 155:19               _SyncHttpClientRequestHeaders.add
package:webdriver/src/sync/command_processor.dart 79:21                                                 SyncHttpCommandProcessor._setUpRequest

[bkonyi]

I believe this is fixed now, right?