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(Case 1143604) The asynchronous function callback method is passed from the Play mode to the Editor

Discussion in '2019.1 Beta' started by 479813005, Apr 5, 2019.

  1. 479813005

    479813005

    Joined:
    Mar 18, 2015
    Posts:
    49
    https://fogbugz.unity3d.com/default.asp?1143604_v8qe8bvth3mn1iog.

    1. What happened

    The asynchronous function callback method is passed from the Play mode to the Editor mode.
    Expected behavior: Forced to stop all asynchronous functions when switching Editor/Play mode.

    2. How we can reproduce it using the example you attached

    Play SampleScene, Stop Play mode. Wait for 10s and will create a cube in the current scene in editor mode. It's wrong.

    Code (CSharp):
    1. using System.Collections;
    2. using System.Collections.Generic;
    3. using UnityEngine;
    4. using System.Threading.Tasks;
    5.  
    6. public class AsyncBug : MonoBehaviour
    7. {
    8.     // Start is called before the first frame update
    9.     async void Start()
    10.     {
    11.         Debug.Log(1);
    12.         await Task.Delay(10000);
    13.         Debug.Log(2);
    14.         GameObject go = GameObject.CreatePrimitive(PrimitiveType.Cube);
    15.         Debug.Log(3);
    16.     }
    17. }
    18.  
     
    Last edited: Apr 5, 2019
  2. 479813005

    479813005

    Joined:
    Mar 18, 2015
    Posts:
    49
    Errors can be reproduced in all versions.
     
    Last edited: Apr 5, 2019
  3. 479813005

    479813005

    Joined:
    Mar 18, 2015
    Posts:
    49
  4. Prodigga

    Prodigga

    Joined:
    Apr 13, 2011
    Posts:
    984
    Yep, this makes async methods very dangerous and ruins the 'sandbox' nature of the editor/play mode.

    I've posted about this in a previous beta, here:
    https://forum.unity.com/threads/asy...e-in-the-editor-potentially-dangerous.591235/

    @mkderoy replied:
    Though there is bug reports from as far back as the start of 2018 , and there isn't any more movement on this issue, so I guess don't hold your breath for a solution from Unity any time soon.
     
    479813005 likes this.
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