Editor Error "Assertion failed 'Thread::CurrentThreadIsMainThread("on upgrade to unity2017

i upgrade unity to 2017.1.1p3 from unity 5.6
have error but it not have in unity 5.6
and this error only happened when use AssetBundle

Please help! (。・д・。) !​

//

Code (CSharp):

1. Assertion failed: Assertion failed on expression: 'Thread::CurrentThreadIsMainThread()'
2. 0x000000014099240B (Unity) StackWalker::GetCurrentCallstack
3. 0x000000014099592F (Unity) StackWalker::ShowCallstack
4. 0x0000000140D3C510 (Unity) GetStacktrace
5. 0x0000000141082A16 (Unity) DebugStringToFile
6. 0x00000001410831EC (Unity) DebugStringToFile
7. 0x0000000140ACE9DF (Unity) AnimationClip::BuildMecanimDataMainThread
8. 0x0000000140ACFBE3 (Unity) AnimationClip::Transfer<StreamedBinaryRead<0> >
9. 0x0000000140AD655D (Unity) AnimationClip::VirtualRedirectTransfer
10. 0x0000000141436048 (Unity) SerializedFile::ReadObject
11. 0x00000001414416CF (Unity) PersistentManager::ReadAndActivateObjectThreaded
12. 0x00000001414431C4 (Unity) PersistentManager::LoadFileCompletelyThreaded
13. 0x00000001413D4FD7 (Unity) LoadSceneOperation::Perform
14. 0x00000001413D4640 (Unity) PreloadManager::ProcessSingleOperation
15. 0x00000001413D47AD (Unity) PreloadManager::Run
16. 0x00000001413D53C7 (Unity) PreloadManager::Run
17. 0x00000001415B80FC (Unity) Thread::RunThreadWrapper
18. 0x00007FFF682C2774 (KERNEL32) BaseThreadInitThunk
19. 0x00007FFF6AC40D51 (ntdll) RtlUserThreadStart

//

//

 

maybe related.
https://forum.unity.com/threads/cur...ndle-loadallassetsasync-unity-2017-1-1.496051