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  1. using System;
  2. using System.Threading;
  3. using System.Threading.Tasks;
  4.  
  5. public class Test
  6. {
  7. 	public static void Main()
  8. 	{
  9. 		// your code goes here
  10. 		Console.WriteLine(Thread.CurrentThread.ManagedThreadId);
  11. 		Console.WriteLine("//////");
  12. 		A().GetAwaiter().GetResult();
  13. 		Console.WriteLine("//////");
  14. 		Console.WriteLine(Thread.CurrentThread.ManagedThreadId);
  15. 		//Console.ReadLine();
  16. 	}
  17.  
  18. 	public static async Task A(){
  19. 		var c = SynchronizationContext.Current;
  20. 		Console.WriteLine(Thread.CurrentThread.ManagedThreadId);
  21. 		await Task.Delay(1);
  22. 		Console.WriteLine(Thread.CurrentThread.ManagedThreadId);
  23.  
  24. 		c.Post(state =>{Console.WriteLine("asdf");}, null);
  25. 	}
  26. }
Runtime error #stdin #stdout #stderr 0.02s 337920KB
comments (?)
stdin
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Standard input is empty
stdout
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1
//////
1
5
stderr
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Unhandled Exception:
System.NullReferenceException: Object reference not set to an instance of an object
  at Test+<A>c__async0.MoveNext () [0x00094] in <25f1dbeb23ec40cdb7e5c520c632b432>:0 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in <8f2c484307284b51944a1a13a14c0266>:0 
  at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x0004e] in <8f2c484307284b51944a1a13a14c0266>:0 
  at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x0002e] in <8f2c484307284b51944a1a13a14c0266>:0 
  at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x0000b] in <8f2c484307284b51944a1a13a14c0266>:0 
  at System.Runtime.CompilerServices.TaskAwaiter.GetResult () [0x00000] in <8f2c484307284b51944a1a13a14c0266>:0 
  at Test.Main () [0x00024] in <25f1dbeb23ec40cdb7e5c520c632b432>:0 
[ERROR] FATAL UNHANDLED EXCEPTION: System.NullReferenceException: Object reference not set to an instance of an object
  at Test+<A>c__async0.MoveNext () [0x00094] in <25f1dbeb23ec40cdb7e5c520c632b432>:0 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in <8f2c484307284b51944a1a13a14c0266>:0 
  at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x0004e] in <8f2c484307284b51944a1a13a14c0266>:0 
  at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x0002e] in <8f2c484307284b51944a1a13a14c0266>:0 
  at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x0000b] in <8f2c484307284b51944a1a13a14c0266>:0 
  at System.Runtime.CompilerServices.TaskAwaiter.GetResult () [0x00000] in <8f2c484307284b51944a1a13a14c0266>:0 
  at Test.Main () [0x00024] in <25f1dbeb23ec40cdb7e5c520c632b432>:0
https://ideone.com/GK6ylU
language:
C# (gmcs 5.20.1)
created:
5 years ago
visibility:
public

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