IL2CPP:AppDomain::InternalIsFinalizingForUnload .Net 4.6

Hi,
The following code:

Code (CSharp):

1.  
2. public class DrinkMe : MonoBehaviour {
3.  
4.    public void DoDrinkMe()
5.    {
6.       var task = new Task(() =>
7.       {
8.          
9.          Thread.Sleep(100);
10.          throw new Exception("Crash fabric");
11.          
12.       });
13.      
14.       task.Start();
15.      
16.      
17.    }
18. }
19.  

Will produce Unsupported internal call for IL2CPP:AppDomain::InternalIsFinalizingForUnload - "This icall is not supported by il2cpp."
On Android and iOS on the next Garbage collector run. With. the stack trace similar to the following:

Code (CSharp):

1. (_ZN6il2cpp2vm7Runtime18UnhandledExceptionEP15Il2CppException+108)
2. 02-17 04:41:42.733 21915 21915 F DEBUG   :     #29 pc 0199b770  /lib/arm/libil2cpp.so (_ZN6il2cpp2gc16GarbageCollector12RunFinalizerEPvS2_+60)
3. 02-17 04:41:42.733 21915 21915 F DEBUG   :     #30 pc 019bfd68  /lib/arm/libil2cpp.so (GC_invoke_finalizers+264)
4. 02-17 04:41:42.733 21915 21915 F DEBUG   :     #31 pc 0199b620  /lib/arm/libil2cpp.so
5. 02-17 04:41:42.733 21915 21915 F DEBUG   :     #32 pc 019a1608  /lib/arm/libil2cpp.so (_ZN6il2cpp2os6Thread10RunWrapperEPv+80)

Unity version I'm using is :2017.3.0f3

The actual problem is usually with async networking methods from .Net.

Code (CSharp):

1. try{
2. data = await udpClient.ReceiveAsync();
3. }
4. catch(Exception ex){
5.  
6. }
7.  
8. //somewhere on the other thread
9. udpClient.Close();

This would eventually generate Unsupported internal call for L2CPP:AppDomain::InternalIsFinalizingForUnload - "This icall is not supported by il2cpp."

So basically it is almost impossible to use .Net async networking with the current state of things.