Client throws error when buffer is received

[MenuItem207]

Calling socket.emitWithAck throws the error: Error: Expected a value of type 'List', but got one of type 'NativeByteBuffer'. This error occurs when my Socket.IO server acknowledges the event with data that contains a <Buffer 00> object (NodeJS).
The callstack:

Error: Expected a value of type 'List<int>', but got one of type 'NativeByteBuffer'
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/errors.dart 266:49      throw_
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/errors.dart 99:3        castError
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/operations.dart 485:10  cast
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/classes.dart 638:14     as_C
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/internal/cast.dart 99:46                                             _get
packages/socket_io_common/src/parser/binary.dart 67:58                                                                         _reconstructPacket
packages/socket_io_common/src/parser/binary.dart 70:22                                                                         <fn>
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/patch/convert_patch.dart 249:8              forEach
packages/socket_io_common/src/parser/binary.dart 69:11                                                                         _reconstructPacket
packages/socket_io_common/src/parser/binary.dart 59:22                                                                         <fn>
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/private/js_array.dart 201:8                 forEach]
packages/socket_io_common/src/parser/binary.dart 58:12                                                                         _reconstructPacket
packages/socket_io_common/src/parser/binary.dart 70:22                                                                         <fn>
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/patch/convert_patch.dart 249:8              forEach
packages/socket_io_common/src/parser/binary.dart 69:11                                                                         _reconstructPacket
packages/socket_io_common/src/parser/binary.dart 59:22                                                                         <fn>
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/private/js_array.dart 201:8                 forEach]
packages/socket_io_common/src/parser/binary.dart 58:12                                                                         _reconstructPacket
packages/socket_io_common/src/parser/binary.dart 49:22                                                                         reconstructPacket
packages/socket_io_common/src/parser/parser.dart 321:27                                                                        takeBinaryData
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/operations.dart 367:37  _checkAndCall
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/operations.dart 431:10  callMethod
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/operations.dart 435:5   dsend
packages/socket_io_common/src/parser/parser.dart 168:37                                                                        add
packages/socket_io_client/src/manager.dart 244:13                                                                              ondata
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/operations.dart 367:37  _checkAndCall
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/operations.dart 372:39  dcall
packages/socket_io_common/src/util/event_emitter.dart 61:14                                                                    <fn>
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/private/js_array.dart 201:8                 forEach]
packages/socket_io_common/src/util/event_emitter.dart 60:11                                                                    emit
packages/socket_io_client/src/engine/socket.dart 463:11                                                                        onPacket
packages/socket_io_client/src/engine/socket.dart 287:34                                                                        <fn>
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/operations.dart 367:37  _checkAndCall
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/operations.dart 372:39  dcall
packages/socket_io_common/src/util/event_emitter.dart 61:14                                                                    <fn>
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/private/js_array.dart 201:8                 forEach]
packages/socket_io_common/src/util/event_emitter.dart 60:11                                                                    emit
packages/socket_io_client/src/engine/transport/transport.dart 127:5                                                            onPacket
packages/socket_io_client/src/engine/transport/transport.dart 121:5                                                            onData
packages/socket_io_client/src/engine/transport/websocket_transport.dart 59:48                                                  <fn>
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/operations.dart 367:37  _checkAndCall
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/operations.dart 372:39  dcall
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/html/dart2js/html_dart2js.dart 37340:58                              <fn>

The following line is where the error is thrown (_reconstructPacket in the class: Binary):

return num >= 0 && num < buffers.length ? buffers[num] : null;

[jumperchen]

Which version on NodeJS are you using?
Do you have any reproduced example for us to test?

[MenuItem207]

Version 19, I don't think its related to the version though. Here's an example project for flutter web + nodejs

[jumperchen]

Thanks for the info., I meant to the version of socket.io on NodeJS. Anyway, I will try to identify this issue.