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Fixed in 2021.1.X

Fixed in 2019.4.X, 2020.2.X



Found in


Issue ID




[Build] AssetDatabase.GetImplicitAssetBundleName asserts & returns wrong result when asset is being deleted

Asset Bundles


Reproduction steps:
1. Open project attached (
2. Delete one asset from each folder (SpritesInSomeBundle, SpritesInSomeOtherBundle, SpritesNotInABunble).

Expected result: Debug message will appear and it will have correct Asset Bundle name.
Actual result: Error appears: "Assertion failed: Use IsAssetAvailable before calling AssetFromGUID", Asset Bundle name in Debug message is the same for all assets.

Notes: This problem is also triggered when duplicating existing asset.
Each folder contains assets with different Asset Bundle name. In 5.6 and 2017.2 Asset Bundle name is returned as empty.
In 5.6 and 2017.2 there is an additional error: Assertion failed: AssetBundle index doesn't exist in the asset database.

Reproduced on: 5.6.0f3, 5.6.1p1, 2017.1.0b6, 2017.2.0a1.

  1. Resolution Note (fix version 2021.1):

    Fixed in: 2021.1.0a8

  2. Resolution Note (fix version 2020.2):

    Fixed in: 2020.2.2f1

  3. Resolution Note (fix version 2019.4):

    Fixed in: 2019.4.19f1

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