Uncaught exception: WebGL with Unity

[Xwilarg]

Hi,

I'm trying to use websocket-sharp for a Unity project on WebGL.
It's working well when I make an executable for Windows but when I export in WebGL and launch it, it give me the following error:
Invoking error handler due to uncaught exception: abort(92) at jsStackTrace (FeranGateWebGL.asm.framework.unityweb:2:27460)
I attempted to make the most basic program to reproduce the error so I did the following:
Compiling the dll and putting it in a "Plugins" folder
Having a script with this code:
`using UnityEngine;
using WebSocketSharp;

public class NetworkScript : MonoBehaviour {

private void Start()
{
    WebSocket ws = new WebSocket("ws://IP:PORT/msg");
    ws.Connect();
}

}
`
So well if someone have an idea I would really appreciate :)

Thanks in advance,

[seattleite7]

I tried your sample on Chrome and Firefox and couldn't reproduce. But then again I didn't have a server running. Does the problem exist even without a valid endpoint?

[russpowers]

This is happening to me as well. I'm using the new beta 2018.2.0b2, so maybe it's just a Unity/IL2CPP bug? It looks like there's a fatal error, which causes it to call LogData.ToString(), which then tries to invoke a null function. Here's a stack trace from Firefox:

Invalid function pointer called with signature 'iii'. Perhaps this is an invalid value (e.g. caused by calling a virtual method on a NULL pointer)? Or calling a function with an incorrect type, which will fail? (it is worth building your source files with -Werror (warnings are errors), as warnings can indicate undefined behavior which can cause this)
UnityLoader.js:1091:40
Build with ASSERTIONS=2 for more info.
UnityLoader.js:1091:40
65
UnityLoader.js:1090:37
65
UnityLoader.js:1091:40
Invoking error handler due to
uncaught exception: abort(65) at jsStackTrace (Web.asm.framework.unityweb:971:12)
stackTrace (Web.asm.framework.unityweb:985:11)
onAbort@file:///C:/proj/realms/viewer/Out/Web/Build/UnityLoader.js:1086:45
abort (Web.asm.framework.unityweb:23743:3)
nullFunc_iii (Web.asm.framework.unityweb:16188:2)
b65 (Web.asm.code.unityweb:3634945:1)
__ZN16VirtFuncInvoker0IP6Type_tE6InvokeEjP12Il2CppObject (Web.asm.code.unityweb:3261085:1)
_LogData_ToString_m25686458 (Web.asm.code.unityweb:1799325:1)
__ZN16VirtFuncInvoker0IP8String_tE6InvokeEjP12Il2CppObject (Web.asm.code.unityweb:3256667:1)
_Logger_defaultOutput_m370439143 (Web.asm.code.unityweb:2907315:1)
_Action_2_Invoke_m3596261411_gshared (Web.asm.code.unityweb:1145812:1)
dynCall_viiii (Web.asm.code.unityweb:3431281:1)
invoke_viiii (Web.asm.framework.unityweb:18616:3)
_Logger_output_m2198400392 (Web.asm.code.unityweb:1416957:1)
_Logger_Fatal_m3897817647 (Web.asm.code.unityweb:3494114:1)
dynCall_viii (Web.asm.code.unityweb:3471684:1)
invoke_viii (Web.asm.framework.unityweb:18544:3)
_WebSocket_connect_m1246296125 (Web.asm.code.unityweb:1504189:1)
_WebSocket_Connect_m2677651139 (Web.asm.code.unityweb:2807963:1)
_WebsocketBufferClient__ctor_m155889199 (Web.asm.code.unityweb:2620599:1)
....

[doctorpangloss]

This isn't supported in WebGL, there are no sockets on that platform. You have to use a .jslib solution, like the one provided by Unity on the Asset Store.