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"NullReferenceException" in Observable.EveryLateUpdate when Disabling Domain Reloading #490

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kyubuns opened this issue May 6, 2021 · 1 comment · May be fixed by #491
Open

"NullReferenceException" in Observable.EveryLateUpdate when Disabling Domain Reloading #490

kyubuns opened this issue May 6, 2021 · 1 comment · May be fixed by #491

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@kyubuns
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kyubuns commented May 6, 2021

When I set Domain Reload to disable in PlayerSettings > Editor > Enter PlayMode Options,
the following code throws NullReferenceExteption.
After setting Domain Reload to disable, enter PlayMode twice.

NullReferenceException: Object reference not set to an instance of an object
UniRx.MainThreadDispatcher.LateUpdateAsObservable () (at Assets/Plugins/UniRx/Scripts/UnityEngineBridge/MainThreadDispatcher.cs:643)
UniRx.Observable.EveryLateUpdate () (at Assets/Plugins/UniRx/Scripts/UnityEngineBridge/Observable.Unity.cs:717)
Test.Start () (at Assets/Test.cs:8)

using UniRx;
using UnityEngine;

public class Test : MonoBehaviour
{
    public void Start()
    {
        Observable.EveryLateUpdate()
            .Subscribe(x => Debug.Log("a"));
    }
}

Environment

  • Unity2020.3.4f1
@kyubuns kyubuns linked a pull request May 10, 2021 that will close this issue
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@AlexMeesters
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AlexMeesters commented May 31, 2022 •
edited

Right now, what happens is, UniRX is still trying to call LateUpdate on your object. But it doesn't exist anymore.
This also happens during runtime if you decide to remove the object in the inspector.

You could make it work by adding AddTo(this), so it unsubscribes when the GameObject has been destroyed:

 Observable.EveryLateUpdate()
            .Subscribe(x => Debug.Log("a"))
            .AddTo(this);

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fix ScenePlaybackDetector.IsPlaying is still false when disable Domain Reloading kyubuns/UniRx
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@kyubuns @AlexMeesters