Null check operator used on a null value (package:centrifuge/src/transport.dart:219:38)
Amir-P opened this issue · comments
Amir Panahandeh commented
Here is what I get in my logs after trying to connect to a server (using v0.9.1).
Null check operator used on a null value
#0 Transport._onDone.<anonymous closure> (package:centrifuge/src/transport.dart:219:38)
#1 _rootRun (dart:async/zone.dart:1418:47)
#2 _CustomZone.run (dart:async/zone.dart:1328:19)
#3 _CustomZone.runGuarded (dart:async/zone.dart:1236:7)
#4 _BufferingStreamSubscription._sendDone.sendDone (dart:async/stream_impl.dart:394:13)
#5 _BufferingStreamSubscription._sendDone (dart:async/stream_impl.dart:404:7)
#6 _BufferingStreamSubscription._close (dart:async/stream_impl.dart:291:7)
#7 _SyncStreamControllerDispatch._sendDone (dart:async/stream_controller.dart:782:19)
#8 _StreamController._closeUnchecked (dart:async/stream_controller.dart:637:7)
#9 _StreamController.close (dart:async/stream_controller.dart:630:5)
#10 new _WebSocketImpl._fromSocket.<anonymous closure> (dart:_http/websocket_impl.dart:1156:19)
#11 _rootRunBinary (dart:async/zone.dart:1450:47)
#12 _CustomZone.runBinary (dart:async/zone.dart:1342:19)
#13 _CustomZone.runBinaryGuarded (dart:async/zone.dart:1252:7)
#14 _BufferingStreamSubscription._sendError.sendError (dart:async/stream_impl.dart:360:15)
#15 _BufferingStreamSubscription._sendError (dart:async/stream_impl.dart:375:9)
#16 _BufferingStreamSubscription._addError (dart:async/stream_impl.dart:280:7)
#17 _SinkTransformerStreamSubscription._addError (dart:async/stream_transformers.dart:75:11)
#18 _SinkTransformerStreamSubscription._handleData (dart:async/stream_transformers.dart:113:7)
#19 _rootRunUnary (dart:async/zone.dart:1434:47)
#20 _CustomZone.runUnary (dart:async/zone.dart:1335:19)
#21 _CustomZone.runUnaryGuarded (dart:async/zone.dart:1244:7)
#22 _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:341:11)
#23 _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)
#24 _SyncStreamControllerDispatch._sendData (dart:async/stream_controller.dart:774:19)
#25 _StreamController._add (dart:async/stream_controller.dart:648:7)
#26 _StreamController.add (dart:async/stream_controller.dart:596:5)
#27 _Socket._onData (dart:io-patch/socket_patch.dart:2314:41)
#28 _rootRunUnary (dart:async/zone.dart:1442:13)
#29 _CustomZone.runUnary (dart:async/zone.dart:1335:19)
#30 _CustomZone.runUnaryGuarded (dart:async/zone.dart:1244:7)
#31 _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:341:11)
#32 _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)
#33 _SyncStreamControllerDispatch._sendData (dart:async/stream_controller.dart:774:19)
#34 _StreamController._add (dart:async/stream_controller.dart:648:7)
#35 _StreamController.add (dart:async/stream_controller.dart:596:5)
#36 new _RawSocket.<anonymous closure> (dart:io-patch/socket_patch.dart:1839:33)
#37 _NativeSocket.issueReadEvent.issue (dart:io-patch/socket_patch.dart:1322:14)
#38 _microtaskLoop (dart:async/schedule_microtask.dart:40:21)
#39 _startMicrotaskLoop (dart:async/schedule_microtask.dart:49:5)
flutter doctor:
[✓] Flutter (Channel stable, 3.0.4, on macOS 12.4 21F79 darwin-arm, locale
en-US)
• Flutter version 3.0.4 at /Users/amirpanahandeh/flutter
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision 85684f9300 (10 weeks ago), 2022-06-30 13:22:47 -0700
• Engine revision 6ba2af10bb
• Dart version 2.17.5
• DevTools version 2.12.2
[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
• Android SDK at /Users/amirpanahandeh/SDK
• Platform android-32, build-tools 30.0.3
• ANDROID_HOME = /Users/amirpanahandeh/SDK
• Java binary at: /Applications/Android
Studio.app/Contents/jre/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build
11.0.12+0-b1504.28-7817840)
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• Xcode at /Applications/Xcode.app/Contents/Developer
• CocoaPods version 1.11.3
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• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
[✓] Android Studio (version 2021.2)
• Android Studio at /Applications/Android Studio.app/Contents
• Flutter plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/9212-flutter
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• Java version OpenJDK Runtime Environment (build
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[✓] IntelliJ IDEA Community Edition (version 2021.1.3)
• IntelliJ at /Applications/IntelliJ IDEA CE.app
• Flutter plugin version 58.0.3
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• VS Code at /Applications/Visual Studio Code.app/Contents
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[✓] Connected device (3 available)
• iPhone 13 (mobile) • C3B1EC66-7051-4848-ADB5-C35B94E63C3A • ios
• com.apple.CoreSimulator.SimRuntime.iOS-15-5 (simulator)
• macOS (desktop) • macos • darwin-arm64
• macOS 12.4 21F79 darwin-arm
• Chrome (web) • chrome • web-javascript
• Google Chrome 104.0.5112.101
[✓] HTTP Host Availability
• All required HTTP hosts are available
• No issues found!
Alexander Emelin commented
Hello, could you provide steps to reproduce? I can fix null check, but I do not understand under what circumstances we are hitting this - can not reproduce this locally.
Andreas Lymbouras commented
This happens to me when the mobile device loses access to the internet.
Alexander Emelin commented
@alymbouras hello, this should be fixed as of 771634f, if you got the exception in the latest version of lib please open a new issue with stack trace.