Arcore-unity-sdk: ARCoreSession NullReferenceException

[azukizuki]

SPECIFIC ISSUE ENCOUNTERED

ARCoreSession raises NullReferenceException on termination of application
It also occurs in HelloAR.

log:

NullReferenceException: Object reference not set to an instance of an object
GoogleARCoreInternal.ARCoreAndroidLifecycleManager.ResetSession () (at Assets/GoogleARCore/SDK/Scripts/Managers/ARCoreAndroidLifecycleManager.cs:143)
GoogleARCore.ARCoreSession.OnDestroy () (at Assets/GoogleARCore/SDK/Scripts/ARCoreSession.cs:82)### VERSIONS USED
ARCore-unity-sdk 1.7

Unity 2018.3.5,2018.3.6
(use instant preview)

STEPS TO REPRODUCE THE ISSUE

1.open helloAR scene.
2.Play
3.Stop

WORKAROUNDS (IF ANY)

null check

ARCoreAndroidLifecycleManager.cs Line141

public void ResetSession()
{
if (OnSessionSetEnabled != null)
{
OnSessionSetEnabled(false);
_Initialize();
ExternApi.ArPresto_reset();
}
}

However, I feel that this method has not ended normally..

ADDITIONAL COMMENTS

[Edgar-BlipparDev]

Experiencing the same issue. Same steps to reproduce. Using unity 2018.2.1.f1

[TimJansenDB]

Here the same with ARCore 1.7.0.
In 1.6.0 LifecycleManager.Instance.ResetSession(); was working just fine.
Now it's not working anymore and after Reset the Background renderer freezes and no tracking.

[superbderrick]

any update? I also met as same issue using unity 2018.3.f2

[jihoons94]

Help!!!

[rusky23]

Also have this issue. However, it currently doesn't seem to be affecting anything. Running HelloAR with Instant Preview on a USB-connected Pixel 2 XL.

The source can be changed from

        public void ResetSession()
        {
            OnSessionSetEnabled(false);
            _Initialize();
            ExternApi.ArPresto_reset();
        }

to

        public void ResetSession()
        {
            if (OnSessionSetEnabled != null)
            {
                OnSessionSetEnabled(false);
            }
            _Initialize();
            ExternApi.ArPresto_reset();
        }

since it seems like the rest of the file does a similar thing, without handling

OnSessionSetEnabled == null

[Edgar-BlipparDev]

Also have this issue. However, it currently doesn't seem to be affecting anything. Running HelloAR with Instant Preview on a USB-connected Pixel 2 XL.

The source can be changed from

        public void ResetSession()
        {
            OnSessionSetEnabled(false);
            _Initialize();
            ExternApi.ArPresto_reset();
        }

to

        public void ResetSession()
        {
            if (OnSessionSetEnabled != null)
            {
                OnSessionSetEnabled(false);
            }
            _Initialize();
            ExternApi.ArPresto_reset();
        }

since it seems like the rest of the file does a similar thing, without handling

OnSessionSetEnabled == null

Also have this issue. However, it currently doesn't seem to be affecting anything. Running HelloAR with Instant Preview on a USB-connected Pixel 2 XL.

The source can be changed from

        public void ResetSession()
        {
            OnSessionSetEnabled(false);
            _Initialize();
            ExternApi.ArPresto_reset();
        }

to

        public void ResetSession()
        {
            if (OnSessionSetEnabled != null)
            {
                OnSessionSetEnabled(false);
            }
            _Initialize();
            ExternApi.ArPresto_reset();
        }

since it seems like the rest of the file does a similar thing, without handling

OnSessionSetEnabled == null

This solves the issue seems like they forgot to check for null! Thanks