Null reference exception when running WhisperChat(sample app) on Mono Version 5.16

[marzim]

Hi @yallie ,

Tried to run the WhisperChat(sample app) on Linux(Opensuse) box with Mono version 5.16.
Server run just fine but Client crash during MainForm_Show
`Unhandled Exception:
System.NullReferenceException: Object reference not set to an instance of an object

Server stack trace: at System.Security.Principal.WindowsIdentity.System.Runtime.Serialization.IDeserializationCallback.OnDeserialization (System.Object sender) [0x00000] in <773ec02b42f74a918ccd74911c8063c9>:0
at System.Runtime.Serialization.ObjectManager.RaiseDeserializationEvent () [0x00021] in <773ec02b42f74a918ccd74911c8063c9>:0`

BTW I'm using the latest version.

Any inputs are much appreciated.

Thanks.

[yallie]

Hi @marzim

Didn't try running Zyan on Linux for a couple of years, sorry.
Looks like there's an issue with WindowsIdentity deserialization under Mono.
Not sure why it pops up in Zyan example that doesn't use authentication...

[BanzaiGit]

Hi @yallie ,

I have same problem with xamarin android on visual studio 2022 community at this line :
var connection = new ZyanConnection("tcpex://DB-PORTABLE2:12345/Sample", protocol);

System.NullReferenceException
Message=Object reference not set to an instance of an object.

here is the stacktrace :

Server stack trace: 
  at System.Security.Principal.WindowsIdentity.System.Runtime.Serialization.IDeserializationCallback.OnDeserialization (System.Object sender) [0x00000] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/corlib/System.Security.Principal/WindowsIdentity.cs:265 
  at System.Runtime.Serialization.ObjectManager.RaiseDeserializationEvent () [0x00021] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/referencesource/mscorlib/system/runtime/serialization/objectmanager.cs:1100 
  at System.Runtime.Serialization.Formatters.Binary.ObjectReader.Deserialize (System.Runtime.Remoting.Messaging.HeaderHandler handler, System.Runtime.Serialization.Formatters.Binary.__BinaryParser serParser, System.Boolean fCheck, System.Boolean isCrossAppDomain, System.Runtime.Remoting.Messaging.IMethodCallMessage methodCallMessage) [0x0010d] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/referencesource/mscorlib/system/runtime/serialization/formatters/binary/binaryobjectreader.cs:206 
  at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize (System.IO.Stream serializationStream, System.Runtime.Remoting.Messaging.HeaderHandler handler, System.Boolean fCheck, System.Boolean isCrossAppDomain, System.Runtime.Remoting.Messaging.IMethodCallMessage methodCallMessage) [0x00099] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/referencesource/mscorlib/system/runtime/serialization/formatters/binary/binaryformatter.cs:197 
  at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize (System.IO.Stream serializationStream, System.Runtime.Remoting.Messaging.HeaderHandler handler, System.Boolean fCheck, System.Runtime.Remoting.Messaging.IMethodCallMessage methodCallMessage) [0x00000] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/referencesource/mscorlib/system/runtime/serialization/formatters/binary/binaryformatter.cs:173 
  at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.DeserializeMethodResponse (System.IO.Stream serializationStream, System.Runtime.Remoting.Messaging.HeaderHandler handler, System.Runtime.Remoting.Messaging.IMethodCallMessage methodCallMessage) [0x00000] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/referencesource/mscorlib/system/runtime/serialization/formatters/binary/binaryformatter.cs:155 
  at Zyan.SafeDeserializationHelpers.Channels.SafeBinaryClientFormatterSink.SyncProcessMessage (System.Runtime.Remoting.Messaging.IMessage msg) [0x00083] in <6859c22e88514256b5fb29f77c07e826>:0 

Exception rethrown at [0]: 
  at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke (System.Runtime.Remoting.Proxies.RealProxy rp, System.Runtime.Remoting.Messaging.IMessage msg, System.Exception& exc, System.Object[]& out_args) [0x00146] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/corlib/System.Runtime.Remoting.Proxies/RealProxy.cs:306 

Thanks