Dart 在颤振应用程序中尝试热重启时出现配置引擎错误
我正在学习dart/Flatter中的streams/bloc模式，当我尝试运行我的应用程序时，无法确定错误来自何处。根据异步错误判断，我假设流在某个地方被挂起。我正在使用Dart 在颤振应用程序中尝试热重启时出现配置引擎错误,dart,flutter,Dart,Flutter,我正在学习dart/Flatter中的streams/bloc模式，当我尝试运行我的应用程序时，无法确定错误来自何处。根据异步错误判断，我假设流在某个地方被挂起。我正在使用dispose（）并关闭其中的流。任何帮助都将不胜感激 这是代码。我将其全部放在一个大块中，但注释了每个代码块来自哪个文件： // bloc.dart import 'dart:async'; import 'validators.dart'; class Bloc extends Validators { fin
dispose（） // bloc.dart
import 'dart:async';
import 'validators.dart';
class Bloc extends Validators {
final _email = new StreamController<String>();
final _password = new StreamController<String>();
// Add data to stream
Stream<String> get email => _email.stream.transform(validateEmail);
Stream<String> get password => _password.stream.transform(validatePassword);
// Change Data
Function(String) get changeEmail => _email.sink.add;
Function(String) get changePassword => _password.sink.add;
dispose() {
_email.close();
_password.close();
}
}
final bloc = Bloc();
// login_screen.dart
import 'package:flutter/material.dart';
import '../blocs/bloc.dart';
class LoginScreen extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Container(
margin: EdgeInsets.all(20.0),
child: Column(
children: [
emailField(),
passwordField(),
Container(
margin: EdgeInsets.only(top: 25.0),
),
raisedButton()
],
));
}
Widget emailField() {
return StreamBuilder(
stream: bloc.email,
builder: (context, snapshot) {
return TextField(
onChanged: bloc.changeEmail,
keyboardType: TextInputType.emailAddress,
decoration: InputDecoration(
hintText: 'ardon@exampl.com',
labelText: 'Enter your email!',
errorText: snapshot.error),
);
});
}
Widget passwordField() {
return TextField(
obscureText: true,
decoration: InputDecoration(hintText: 'password', labelText: 'password'),
);
}
Widget raisedButton() {
return RaisedButton(
child: Text('Login'),
color: Colors.blue,
onPressed: () {},
);
}
}
// validation.dart
import 'dart:async';
class Validators {
final validateEmail =
StreamTransformer<String, String>.fromHandlers(handleData: (email, sink) {
if (email.contains('@')) {
sink.add(email);
} else {
sink.addError('Please enter valid email');
}
});
final validatePassword = StreamTransformer<String, String>.fromHandlers(
handleData: (password, sink) {
if (password.length > 4) {
sink.add(password);
} else {
sink.addError('Please enter the right number of characters');
}
});
}
//bloc.dart
导入“dart:async”；
导入“validators.dart”；
类组扩展了验证器{
最终电子邮件=新的StreamController（）；
最终密码=新的StreamController（）；
//向流中添加数据
Stream get email=>\u email.Stream.transform（validateEmail）；
Stream get password=>\u password.Stream.transform（validatePassword）；
//更改数据
函数（字符串）get changemail=>\u email.sink.add；
函数（字符串）get changePassword=>\u password.sink.add；
处置{
_email.close（）；
_password.close（）；
}
}
最终集团=集团（）；
//登录屏幕.dart
进口“包装：颤振/材料.省道”；
导入“../blocs/bloc.dart”；
类LoginScreen扩展了无状态小部件{
@凌驾
小部件构建（构建上下文）{
返回容器(
裕度：所有边缘集（20.0），
子：列(
儿童：[
emailField（），
passwordField（），
容器(
边距：仅限边缘集（顶部：25.0），
),
raisedButton（）
],
));
}
Widget emailField（）{
返回流生成器(
流：bloc.email，
生成器：（上下文，快照）{
返回文本字段(
onChanged:bloc.changemail，
键盘类型：TextInputType.emailAddress，
装饰：输入装饰(
hintText:'ardon@exampl.com',
labelText:“输入您的电子邮件！”，
errorText:snapshot.error），
);
});
}
小部件密码字段（）{
返回文本字段(
蒙昧文字：对，
装饰：输入装饰（hintText:“密码”，labelText:“密码”），
);
}
Widget raisedButton（）{
返回上升按钮(
子项：文本（'Login'），
颜色：颜色，蓝色，
按下：（）{}，
);
}
}
//验证。省道
导入“dart:async”；
类验证器{
最终确认邮件=
StreamTransformer.fromHandlers（handleData:（电子邮件、接收器）{
if（email.contains（'@'））{
添加（电子邮件）；
}否则{
sink.addError（'请输入有效电子邮件'）；
}
});
最终验证密码=StreamTransformer.fromHandlers(
handleData：（密码，接收器）{
如果（password.length>4）{
sink.add（密码）；
}否则{
sink.addError（'请输入正确的字符数'）；
}
});
}
⣯[VERBOSE-2:shell.cc(181)] Dart Error: Can't load Kernel binary: Invalid kernel binary format version.
[VERBOSE-2:engine.cc(158)] Could not prepare to run the isolate.
[VERBOSE-2:engine.cc(117)] Engine not prepare and launch isolate.
Error -32000 received from application: Could not run configuration in engine.
JSON-RPC error -32000: Could not run configuration in engine.
package:json_rpc_2/src/client.dart 110:64 Client.sendRequest
package:json_rpc_2/src/peer.dart 68:15 Peer.sendRequest
package:flutter_tools/src/vmservice.dart 293:13 VMService._sendRequest
package:flutter_tools/src/vmservice.dart 842:12 VM.invokeRpcRaw
===== asynchronous gap ===========================
package:flutter_tools/src/vmservice.dart 865:49 VM.invokeRpc
===== asynchronous gap ===========================
package:flutter_tools/src/vmservice.dart 932:12 VM.runInView
package:flutter_tools/src/vmservice.dart 1439:20 FlutterView.runFromSource
===== asynchronous gap ===========================
package:flutter_tools/src/run_hot.dart 379:18 HotRunner._launchInView
===== asynchronous gap ===========================
package:flutter_tools/src/run_hot.dart 390:13 HotRunner._launchFromDevFS
===== asynchronous gap ===========================
package:flutter_tools/src/run_hot.dart 442:11 HotRunner._restartFromSources
===== asynchronous gap ===========================
package:flutter_tools/src/run_hot.dart 505:15 HotRunner.restart
===== asynchronous gap ===========================
package:flutter_tools/src/run_hot.dart 282:44 HotRunner.handleTerminalCommand
===== asynchronous gap ===========================
package:flutter_tools/src/resident_runner.dart 754:15 ResidentRunner.processTerminalInput
===== asynchronous gap ===========================
dart:async/zone.dart 1132:38 _rootRunUnary
dart:async/zone.dart 1029:19 _CustomZone.runUnary
dart:async/zone.dart 931:7 _CustomZone.runUnaryGuarded
dart:async/stream_impl.dart 336:11 _BufferingStreamSubscription._sendData
dart:async/stream_impl.dart 263:7 _BufferingStreamSubscription._add
dart:async/broadcast_stream_controller.dart 379:20 _SyncBroadcastStreamController._sendData
dart:async/broadcast_stream_controller.dart 254:5 _BroadcastStreamController.add
dart:async/broadcast_stream_controller.dart 480:11 _AsBroadcastStreamController.add
dart:async/zone.dart 1132:38 _rootRunUnary
dart:async/zone.dart 1029:19 _CustomZone.runUnary
dart:async/zone.dart 931:7 _CustomZone.runUnaryGuarded
dart:async/stream_impl.dart 336:11 _BufferingStreamSubscription._sendData
dart:async/stream_impl.dart 263:7 _BufferingStreamSubscription._add
dart:async/stream_transformers.dart 68:11 _SinkTransformerStreamSubscription._add
dart:async/stream_transformers.dart 15:11 _EventSinkWrapper.add
dart:convert/string_conversion.dart 268:11 _StringAdapterSink.add
dart:convert/string_conversion.dart 273:7 _StringAdapterSink.addSlice
dart:convert/string_conversion.dart 348:20 _Utf8ConversionSink.addSlice
dart:convert/ascii.dart 278:17 _ErrorHandlingAsciiDecoderSink.addSlice
dart:convert/ascii.dart 264:5 _ErrorHandlingAsciiDecoderSink.add
dart:convert/chunked_conversion.dart 86:18 _ConverterStreamEventSink.add
dart:async/stream_transformers.dart 120:24 _SinkTransformerStreamSubscription._handleData
dart:async/zone.dart 1132:38 _rootRunUnary
dart:async/zone.dart 1029:19 _CustomZone.runUnary
dart:async/zone.dart 931:7 _CustomZone.runUnaryGuarded
dart:async/stream_impl.dart 336:11 _BufferingStreamSubscription._sendData
dart:async/stream_impl.dart 263:7 _BufferingStreamSubscription._add
dart:async/stream_controller.dart 763:19 _SyncStreamController._sendData
dart:async/stream_controller.dart 639:7 _StreamController._add
dart:async/stream_controller.dart 585:5 _StreamController.add
dart:io/runtime/binsocket_patch.dart 1714:41 _Socket._onData
dart:async/zone.dart 1136:13 _rootRunUnary
dart:async/zone.dart 1029:19 _CustomZone.runUnary
dart:async/zone.dart 931:7 _CustomZone.runUnaryGuarded
dart:async/stream_impl.dart 336:11 _BufferingStreamSubscription._sendData
dart:async/stream_impl.dart 263:7 _BufferingStreamSubscription._add
dart:async/stream_controller.dart 763:19 _SyncStreamController._sendData
dart:async/stream_controller.dart 639:7 _StreamController._add
dart:async/stream_controller.dart 585:5 _StreamController.add
dart:io/runtime/binsocket_patch.dart 1276:33 new _RawSocket.<fn>
dart:io/runtime/binsocket_patch.dart 819:14 _NativeSocket.issueReadEvent.issue
dart:async/schedule_microtask.dart 41:21 _microtaskLoop
dart:async/schedule_microtask.dart 50:5 _startMicrotaskLoop
dart:isolate/runtime/libisolate_patch.dart 115:13 _runPendingImmediateCallback
dart:isolate/runtime/libisolate_patch.dart 172:5 _RawReceivePortImpl._handleMessage
⣯[VERBOSE-2:shell.cc（181）]Dart错误：无法加载内核二进制文件：内核二进制文件格式版本无效。
[VERBOSE-2:engine.cc（158）]无法准备运行隔离。
[VERBOSE-2:engine.cc（117）]发动机未准备和启动。
从应用程序接收到错误-32000:无法在引擎中运行配置。
JSON-RPC错误-32000:无法在引擎中运行配置。
包：json_rpc_2/src/client.dart 110:64 client.sendRequest
包：json_rpc_2/src/peer.dart 68:15 peer.sendRequest
包：flatter\u tools/src/vmservice.dart 293:13 vmservice.\u sendRequest
包：flatter_tools/src/vmservice.dart 842:12 VM.invokercraw
======异步间隙===========================
包：flatter_tools/src/vmservice.dart 865:49 VM.invokeRpc
======异步间隙===========================
包：flatter_tools/src/vmservice.dart 932:12 VM.runInView
包：flatter_tools/src/vmservice.dart 1439:20 flatterview.runFromSource
======异步间隙===========================
软件包：颤振工具/src/run\u hot.dart 379:18热流道
======异步间隙===========================
软件包：颤振工具/src/run\u hot.dart 390:13热流道。\u从devfs启动
======异步间隙===========================
软件包：颤振工具/src/run\u hot.dart 442:11热流道
======异步间隙===========================
软件包：颤振工具/src/run\u hot.dart 505:15 HotRunner.restart
======异步间隙===========================
软件包：颤振工具/src/run\u hot.dart 282:44热流道.handleTerminalCommand
======异步间隙===========================
软件包：颤振工具/src/resident\u转轮。dart 754:15 ResidentRunner.processTerminalInput
======异步间隙===========================
dart:async/zone.dart 1132:38\u rootRunUnary
dart:async/zone.dart 1029:19\u CustomZone.runUnary
dart:async/zone.dart 931:7\u CustomZone.runUnaryGuarded
dart:async/stream\u impl.dart 336:11\u BufferingStreamSubscription.\u sendData
dart:async/stream\u impl.dart 263:7\u BufferingStreamSubscription.\u add
dart:async/broadcast\u stream\u controller.dart 379:20\u SyncBroadcastStreamController.\u sendData
dart:async/broadcast\u stream\u controller.dart 254:5\u BroadcastStreamController.add
dart:async/broadcast\u stream\u controller.dart 480:11\u AsBroadcastStreamController.add
dart:async/zone.dart 1132:38\u rootRunUnary
dart:async/zone.dart 1029:19\u CustomZone.runUnary
dart:async/zone.dart 931:7\u CustomZone.runUnaryGuarded
dart:async/stream\u impl.dart 336:11\u BufferingStreamSubscription.\u sendData
dart:async/stream\u impl.dart 263:7\u BufferingStreamSubscription.\u add
dart:async/stream\u transformers.dart 68:11\u SinkTransformers流订阅。\u添加
dart:async/stream\u transformers.dart 15:11
Initializing hot reload... ⣟Hot reload failed: type 'TimeoutException' is not a subtype of type 'Map<String, dynamic>'
#0 HotRunner._reloadSources.<anonymous closure> (package:flutter_tools/src/run_hot.dart:587:45)
#1 _rootRunUnary (dart:async/zone.dart:1132:38)
#2 _CustomZone.runUnary (dart:async/zone.dart:1029:19)
#3 _FutureListener.handleError (dart:async/future_impl.dart:147:20)
#4 Future._propagateToListeners.handleError (dart:async/future_impl.dart:654:47)
#5 Future._propagateToListeners (dart:async/future_impl.dart:675:24)
#6 Future._completeError (dart:async/future_impl.dart:494:5)
#7 Future.wait.handleError (dart:async/future.dart:379:18)
#8 _rootRunBinary (dart:async/zone.dart:1144:38)
#9 _CustomZone.runBinary (dart:async/zone.dart:1037:19)
#10 _FutureListener.handleError (dart:async/future_impl.dart:143:20)
#11 Future._propagateToListeners.handleError (dart:async/future_impl.dart:654:47)
#12 Future._propagateToListeners (dart:async/future_impl.dart:675:24)
#13 Future._completeError (dart:async/future_impl.dart:494:5)
#14 _SyncCompleter._completeError (dart:async/future_impl.dart:55:12)
#15 _Completer.completeError (dart:async/future_impl.dart:27:5)
#16 _AsyncAwaitCompleter.completeError (dart:async/runtime/libasync_patch.dart:40:18)
#17 Isolate.reloadSources (package:flutter_tools/src/vmservice.dart)
<asynchronous suspension>
#18 FlutterDevice.reloadSources (package:flutter_tools/src/resident_runner.dart:144:66)
#19 HotRunner._reloadSources (package:flutter_tools/src/run_hot.dart:579:67)
<asynchronous suspension>
#20 HotRunner.restart (package:flutter_tools/src/run_hot.dart:520:24)
<asynchronous suspension>
#21 HotRunner.handleTerminalCommand (package:flutter_tools/src/run_hot.dart:282:44)
<asynchronous suspension>
#22 ResidentRunner.processTerminalInput (package:flutter_tools/src/resident_runner.dart:754:15)
<asynchronous suspension>
#23 _rootRunUnary (dart:async/zone.dart:1132:38)
#24 _CustomZone.runUnary (dart:async/zone.dart:1029:19)
#25 _CustomZone.runUnaryGuarded (dart:async/zone.dart:931:7)
#26 _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:336:11)
#27 _BufferingStreamSubscription._add (dart:async/stream_impl.dart:263:7)
#28 _SyncBroadcastStreamController._sendData (dart:async/broadcast_stream_controller.dart:379:20)
#29 _BroadcastStreamController.add (dart:async/broadcast_stream_controller.dart:254:5)
#30 _AsBroadcastStreamController.add (dart:async/broadcast_stream_controller.dart:480:11)
#31 _rootRunUnary (dart:async/zone.dart:1132:38)
#32 _CustomZone.runUnary (dart:async/zone.dart:1029:19)
#33 _CustomZone.runUnaryGuarded (dart:async/zone.dart:931:7)
#34 _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:336:11)
#35 _BufferingStreamSubscription._add (dart:async/stream_impl.dart:263:7)
#36 _SinkTransformerStreamSubscription._add (dart:async/stream_transformers.dart:68:11)
#37 _EventSinkWrapper.add (dart:async/stream_transformers.dart:15:11)
#38 _StringAdapterSink.add (dart:convert/string_conversion.dart:268:11)
#39 _StringAdapterSink.addSlice (dart:convert/string_conversion.dart:273:7)
#40 _Utf8ConversionSink.addSlice (dart:convert/string_conversion.dart:348:20)
#41 _ErrorHandlingAsciiDecoderSink.addSlice (dart:convert/ascii.dart:278:17)
#42 _ErrorHandlingAsciiDecoderSink.add (dart:convert/ascii.dart:264:5)
#43 _ConverterStreamEventSink.add (dart:convert/chunked_conversion.dart:86:18)
#44 _SinkTransformerStreamSubscription._handleData (dart:async/stream_transformers.dart:120:24)
#45 _rootRunUnary (dart:async/zone.dart:1132:38)
#46 _CustomZone.runUnary (dart:async/zone.dart:1029:19)
#47 _CustomZone.runUnaryGuarded (dart:async/zone.dart:931:7)
#48 _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:336:11)
#49 _BufferingStreamSubscription._add (dart:async/stream_impl.dart:263:7)
#50 _SyncStreamController._sendData (dart:async/stream_controller.dart:763:19)
#51 _StreamController._add (dart:async/stream_controller.dart:639:7)
#52 _StreamController.add (dart:async/stream_controller.dart:585:5)
#53 _Socket._onData (dart:io/runtime/binsocket_patch.dart:1714:41)
#54 _rootRunUnary (dart:async/zone.dart:1136:13)
#55 _CustomZone.runUnary (dart:async/zone.dart:1029:19)
#56 _CustomZone.runUnaryGuarded (dart:async/zone.dart:931:7)
#57 _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:336:11)
#58 _BufferingStreamSubscription._add (dart:async/stream_impl.dart:263:7)
#59 _SyncStreamController._sendData (dart:async/stream_controller.dart:763:19)
#60 _StreamController._add (dart:async/stream_controller.dart:639:7)
#61 _StreamController.add (dart:async/stream_controller.dart:585:5)
#62 new _RawSocket.<anonymous closure> (dart:io/runtime/binsocket_patch.dart:1276:33)
#63 _NativeSocket.issueReadEvent.issue (dart:io/runtime/binsocket_patch.dart:819:14)
#64 _microtaskLoop (dart:async/schedule_microtask.dart:41:21)
#65 _startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5)
#66 _runPendingImmediateCallback (dart:isolate/runtime/libisolate_patch.dart:115:13)
#67 _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:172:5)
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