Flutter crash report; please file at https://github.com/flutter/flutter/issues.

## command

flutter run -d AKC0218316000622

## exception

RpcException: JSON-RPC error -32000: There are no running service protocol handlers.

```
package:json_rpc_2/src/client.dart 110:64              Client.sendRequest
package:json_rpc_2/src/peer.dart 79:15                 Peer.sendRequest
package:flutter_tools/src/vmservice.dart 316:13        VMService._sendRequest
package:flutter_tools/src/vmservice.dart 851:60        VM.invokeRpcRaw
===== asynchronous gap ===========================
package:flutter_tools/src/vmservice.dart 872:49        VM.invokeRpc
===== asynchronous gap ===========================
package:flutter_tools/src/vmservice.dart 941:12        VM.runInView
package:flutter_tools/src/vmservice.dart 1455:20       FlutterView.runFromSource
===== asynchronous gap ===========================
package:flutter_tools/src/run_hot.dart 372:24          HotRunner._launchInView
package:flutter_tools/src/run_hot.dart 387:19          HotRunner._launchFromDevFS
===== asynchronous gap ===========================
package:flutter_tools/src/run_hot.dart 458:11          HotRunner._restartFromSources
===== asynchronous gap ===========================
package:flutter_tools/src/run_hot.dart 546:46          HotRunner.restart
===== asynchronous gap ===========================
package:flutter_tools/src/run_hot.dart 277:24          HotRunner.handleTerminalCommand
===== asynchronous gap ===========================
package:flutter_tools/src/resident_runner.dart 898:15  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 375:20     _SyncBroadcastStreamController._sendData
dart:async/broadcast_stream_controller.dart 250:5      _BroadcastStreamController.add
dart:async/broadcast_stream_controller.dart 474:11     _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 236:11             _StringAdapterSink.add
dart:convert/string_conversion.dart 241:7              _StringAdapterSink.addSlice
dart:convert/string_conversion.dart 312:20             _Utf8ConversionSink.addSlice
dart:convert/ascii.dart 252:17                         _ErrorHandlingAsciiDecoderSink.addSlice
dart:convert/ascii.dart 238:5                          _ErrorHandlingAsciiDecoderSink.add
dart:convert/chunked_conversion.dart 72:18             _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 764:19               _SyncStreamController._sendData
dart:async/stream_controller.dart 640:7                _StreamController._add
dart:async/stream_controller.dart 586:5                _StreamController.add
dart:io-patch/socket_patch.dart 1786:41                _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 764:19               _SyncStreamController._sendData
dart:async/stream_controller.dart 640:7                _StreamController._add
dart:async/stream_controller.dart 586:5                _StreamController.add
dart:io-patch/socket_patch.dart 1335:33                new _RawSocket.<fn>
dart:io-patch/socket_patch.dart 856:14                 _NativeSocket.issueReadEvent.issue
dart:async/schedule_microtask.dart 41:21               _microtaskLoop
dart:async/schedule_microtask.dart 50:5                _startMicrotaskLoop
dart:isolate-patch/isolate_patch.dart 116:13           _runPendingImmediateCallback
dart:isolate-patch/isolate_patch.dart 173:5            _RawReceivePortImpl._handleMessage
```

## flutter doctor

```
[32m[✓][39m Flutter (Channel stable, v1.7.8+hotfix.4, on Mac OS X 10.14.6 18G87, locale zh-Hans-CN)
    [32m•[39m Flutter version 1.7.8+hotfix.4 at /Users/gengmei/flutter
    [32m•[39m Framework revision 20e59316b8 (9 weeks ago), 2019-07-18 20:04:33 -0700
    [32m•[39m Engine revision fee001c93f
    [32m•[39m Dart version 2.4.0

[32m[✓][39m Android toolchain - develop for Android devices (Android SDK version 29.0.2)
    [32m•[39m Android SDK at /Users/gengmei/Library/Android/sdk
    [32m•[39m Android NDK location not configured (optional; useful for native profiling support)
    [32m•[39m Platform android-29, build-tools 29.0.2
    [32m•[39m Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    [32m•[39m Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1343-b01)
    [32m•[39m All Android licenses accepted.

[32m[✓][39m Xcode - develop for iOS and macOS (Xcode 10.3)
    [32m•[39m Xcode at /Applications/Xcode.app/Contents/Developer
    [32m•[39m Xcode 10.3, Build version 10G8
    [32m•[39m CocoaPods version 1.7.5

[32m[✓][39m iOS tools - develop for iOS devices
    [32m•[39m ios-deploy 1.9.4

[32m[✓][39m Android Studio (version 3.4)
    [32m•[39m Android Studio at /Applications/Android Studio.app/Contents
    [32m•[39m Flutter plugin version 39.0.1
    [32m•[39m Dart plugin version 183.6270
    [32m•[39m Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1343-b01)

[32m[✓][39m VS Code (version 1.38.1)
    [32m•[39m VS Code at /Applications/Visual Studio Code.app/Contents
    [32m•[39m Flutter extension version 3.4.1

[32m[✓][39m Connected device (3 available)
    [32m•[39m CLT AL01                  • AKC0218316000622                     • android-arm64 • Android 9 (API 28)
    [32m•[39m Android SDK built for x86 • emulator-5554                        • android-x86   • Android 9 (API 28) (emulator)
    [32m•[39m iPhone Xʀ                 • F628F199-078C-4B19-AC7F-732EEB157FDD • ios           • com.apple.CoreSimulator.SimRuntime.iOS-12-4
      (simulator)

[32m•[39m No issues found!
```
