Load AssetBundle with Animator Assertion failed

Hello,

I'm using assetbundle system to load data. When loading an asset that has dependencies with an animator I got this error :

Code (CSharp):

1. Assertion failed: Assertion failed on expression: 'Thread::CurrentThreadIsMainThread()'
2. 0x000000014098D85B (Unity) StackWalker::GetCurrentCallstack
3. 0x0000000140990E0F (Unity) StackWalker::ShowCallstack
4. 0x0000000140D36CE0 (Unity) GetStacktrace
5. 0x000000014107C036 (Unity) DebugStringToFile
6. 0x000000014107C80C (Unity) DebugStringToFile
7. 0x0000000140AC9B4F (Unity) AnimationClip::BuildMecanimDataMainThread
8. 0x0000000140ACAD53 (Unity) AnimationClip::Transfer<StreamedBinaryRead<0> >
9. 0x0000000140AD16CD (Unity) AnimationClip::VirtualRedirectTransfer
10. 0x000000014142D4F8 (Unity) SerializedFile::ReadObject
11. 0x000000014143A181 (Unity) PersistentManager::LoadObjectsThreaded
12. 0x00000001413CBE8B (Unity) LoadOperation::Perform
13. 0x00000001413CC1A0 (Unity) PreloadManager::ProcessSingleOperation
14. 0x00000001413CC30D (Unity) PreloadManager::Run
15. 0x00000001413CCF47 (Unity) PreloadManager::Run
16. 0x00000001415AF5CC (Unity) Thread::RunThreadWrapper
17. 0x00007FFE4EEA2774 (KERNEL32) BaseThreadInitThunk
18. 0x00007FFE4EFB0D51 (ntdll) RtlUserThreadStart

I tried with LoadAssetAsync and LoadAsset , both trigger the assert.
The loading call is in a coroutine.

The object needed is correctly loaded, but the error is annoying (as I load multiple objects). I don't get this error when loading object that have no dependencies with an animator.

Does anyone has any idea to avoid the assert?

 

Did you load all asset bundle dependencies, prior trying to load assets from that bundle? Asset bundles often depend on other asset bundles and without loading those dependencies first, trying to load assets can often result in unexpected behavior.

https://docs.unity3d.com/Manual/AssetBundles-Dependencies.html

 

I only have one big bundle (for testing) and load items by name, so I don't think it's a dependencies problem. The callstack looks like animator cannot be init during the thread used for assetbundle loading.

 

Nobody tried to load a object with animator using assetbundles?

 

Possibly related
CurrentThreadIsMainThread() error when using Asset Bundle LoadAllAssetsAsync & Unity 2017.1.1

 

using unity2017.2f1
I get this:
Assertion failed: Assertion failed on expression: 'Thread::CurrentThreadIsMainThread()'
0x00000001411AC76B (Unity) StackWalker::GetCurrentCallstack
0x00000001411AF0FF (Unity) StackWalker::ShowCallstack
0x0000000141089420 (Unity) GetStacktrace
0x00000001405956C3 (Unity) DebugStringToFile
0x0000000140595EA1 (Unity) DebugStringToFile
0x00000001415F68CF (Unity) AnimationClip::BuildMecanimDataMainThread
0x00000001415F7993 (Unity) AnimationClip::Transfer<StreamedBinaryRead<0> >
0x00000001415FE37D (Unity) AnimationClip::VirtualRedirectTransfer
0x00000001409A57B8 (Unity) SerializedFile::ReadObject
0x000000014098BE4F (Unity) PersistentManager::ReadAndActivateObjectThreaded
0x000000014098DE8A (Unity) PersistentManager::LoadObjectsThreaded
0x00000001406B71DD (Unity) LoadSceneOperation:erform
0x00000001406B6890 (Unity) PreloadManager:rocessSingleOperation
0x00000001406B69FD (Unity) PreloadManager::Run
0x00000001406B7667 (Unity) PreloadManager::Run
0x00000001407B1918 (Unity) Thread::RunThreadWrapper
0x0000000076B359CD (kernel32) BaseThreadInitThunk
0x0000000076DAA561 (ntdll) RtlUserThreadStart