UDN case : [Link Removed]
We are seeing a crash in UAnimInstance::DisplayDebug() at the following line:
The crash occurs because MontageInstance->Montage is nullptr.
This appears to happen when a particular character finishes playing an animation montage. The sequence of events appears to be, in Frame N:
I believe this issue is related to physics animation blending due to the involvement of FParallelBlendPhysicsCompletionTask in the above call stack, plus the fact that if I remove the component that enables that feature on the character then the crash no longer occurs. Unfortunately I have not been able to reproduce this in a clean project.
I have not been able to reproduce, I have fixed the crash by looking at the crash itself and looking at the code
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-169526 in the post.