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Fixed in 1.5.x or higher

Votes

3

Found in [Package]

1.2.4

Issue ID

1190427

Regression

Yes

[Addressables] Exception is thrown when unloading Addressable Scene with UnloadSceneAsync(loadHandle)

Package: Addressables

-

How to reproduce:
1. Open user's attached project ("Addressable Unload Scene Bug.zip") using the EnvIronman VM (optional) (more information in Edit).
2. Open SampleScene scene
3. Enter Play mode
4. Press 'L' to load AddressableScene scene
5. Press 'U' to unload AddressableScene scene

Expected result: No exception is thrown
Actual result: Exception is thrown

Reproducible with: 2018.4.11f1, 2019.2.9f1, 2019.3.0b6, 2020.1.0a8 (all version were tested with Addressables 1.1.9, 1.2.4)
Not reproducible with: 2018.4.11f1, 2019.2.9f1, 2019.3.0b6, 2020.1.0a8 (all version were tested with 1.1.7)

  1. Resolution Note (fix version 1.5.x or higher):

    This fix was released toward the end of 2019.

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Comments (3)

  1. HLSeanStevens

    Feb 08, 2020 00:29

    This issue was fixed in: [1.5.0] - 2019-12-09

    https://docs.unity3d.com/Packages/com.unity.addressables@1.6/changelog/CHANGELOG.html
    "Fixed issue where unloading a scene was throwing an invalid handle error."

  2. RunninglVlan

    Nov 13, 2019 13:58

    Yeah, and I reproduced it using Addressables v1.3.8 (and Unity v2019.3.0b8).

  3. RunninglVlan

    Nov 13, 2019 13:44

    Some more info:
    Actual exception: "Exception: Attempting to use an invalid operation handle"

    Because of this Exception `Addressables.UnloadSceneAsync(AsyncOperationHandle).Completed` isn't called.

    Did some digging: checked Addressables Event Viewer, and there's some leftover operation every time I load and unload a scene: "UnityEngine.ResourceManagement.ResourceProviders.SceneProvider+UnloadSceneOp, result'', status='None'". Checked frame events, and it seems duplicate unload operation is created:
    first there's AsyncOperationCreate - Scene(New Scene)
    then AsyncOperationComplete - Scene(New Scene)
    then ...Create - ...UnloadSceneOp
    then one more ...Create - ...UnloadSceneOp
    tehn ...Destroy - Scene(New Scene)
    then ...Complete - ...UnloadSceneOp 2 times
    and only 1 ...Destroy - ...UnloadSceneOp

    Exception isn't thrown using `Addressables.UnloadSceneAsync(SceneInstance)`. Leftover operation is still there with this approach too.

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