Linux (Arch): ZeroMQException(22): EINVAL

[hilpara]

I cloned the repository and wanted to test the example and got exception:

`
══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════
The following ZeroMQException was thrown building Builder:
ZeroMQException(22): EINVAL

The relevant error-causing widget was:
MaterialApp MaterialApp:file:///xxx/dartzmq/example/lib/main.dart:19:12

When the exception was thrown, this was the stack:
#0 _checkErrorCode (package:dartzmq/src/exception.dart:56:5)
#1 _checkReturnCode (package:dartzmq/src/exception.dart:49:5)
#2 new ZMonitor (package:dartzmq/src/monitor.dart:216:5)
#3 new MonitoredZSocket (package:dartzmq/src/socket.dart:360:16)
#4 ZContext.createMonitoredSocket (package:dartzmq/src/zeromq.dart:228:23)
#5 _MyHomePageState.initState (package:dartzmq_example/main.dart:45:24)
#6 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:5618:55)
#7 ComponentElement.mount (package:flutter/src/widgets/framework.dart:5463:5)
... Normal element mounting (228 frames)
#235 Element.inflateWidget (package:flutter/src/widgets/framework.dart:4340:16)
#236 MultiChildRenderObjectElement.inflateWidget (package:flutter/src/widgets/framework.dart:6904:36)
#237 MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6916:32)
... Normal element mounting (489 frames)
#726 Element.inflateWidget (package:flutter/src/widgets/framework.dart:4340:16)
#727 Element.updateChild (package:flutter/src/widgets/framework.dart:3849:18)
#728 _RawViewElement._updateChild (package:flutter/src/widgets/view.dart:291:16)
#729 _RawViewElement.mount (package:flutter/src/widgets/view.dart:314:5)
... Normal element mounting (7 frames)
#736 Element.inflateWidget (package:flutter/src/widgets/framework.dart:4340:16)
#737 Element.updateChild (package:flutter/src/widgets/framework.dart:3849:18)
#738 RootElement._rebuild (package:flutter/src/widgets/binding.dart:1581:16)
#739 RootElement.mount (package:flutter/src/widgets/binding.dart:1550:5)
#740 RootWidget.attach. (package:flutter/src/widgets/binding.dart:1503:18)
#741 BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2845:19)
#742 RootWidget.attach (package:flutter/src/widgets/binding.dart:1502:13)
#743 WidgetsBinding.attachToBuildOwner (package:flutter/src/widgets/binding.dart:1239:27)
#744 WidgetsBinding.attachRootWidget (package:flutter/src/widgets/binding.dart:1221:5)
#745 WidgetsBinding.scheduleAttachRootWidget. (package:flutter/src/widgets/binding.dart:1207:7)
#749 _RawReceivePort._handleMessage (dart:isolate-patch/isolate_patch.dart:184:12)
(elided 3 frames from class _Timer and dart:async-patch)
`

Any ideas what went wrong and how to fix it?

[enwi]

It seems that the supplied endpoint is wrong:
EINVAL: The endpoint supplied is invalid.

Taken from https://libzmq.readthedocs.io/en/zeromq4-1/zmq_socket_monitor.html

[enwi]

It seems like this line of code needs some rework

dartzmq/lib/src/monitor.dart

Line 210 in 70030a9

final address = 'inproc://monitor${socket.hashCode}';