Description

Repro rate 3/5

Regression to be tested

Testing with a fresh level sequence no crash occurs, Tried to do it without rekeying and did not get a crash. I repro'd it a few times and sometimes no crash occurred I only seemed to get it while using this level and sequence.

Seems to also Crash while creating a key with Middle mouse as well

Right Clicking to Duplicate has also crashed the engine 
Entering to key also crashes 

Steps to Reproduce
  1. Open QASequencer 
  2. Open TrackArea_Level
  3. Open TrackAreaRoot_LS
  4. Double Click on TrackArea_Shot
  5. Inside Cam2 move the Transform Key to 300
  6. Scrub to 450, right click the key at 300 and Rekey
  7. Middle Mouse click and hold the key and move it somewhere else
  8. Scrub the track 

Expected: Level Sequencer is able to scrub 

Actual: Crash

Callstack
Assertion failed: UniformBuffer [File:D:\FN_Main\Engine\Source\Runtime\RHI\Private\RHIContext.cpp] [Line: 58] Attemped to assign a null uniform buffer to the global uniform buffer bindings.

UnrealEditor_Core!FDebug::CheckVerifyFailedImpl2() [AssertionMacros.cpp:672]
UnrealEditor_RHI!FUniformBufferStaticBindings::AddUniformBuffer() [RHIContext.cpp:58]
UnrealEditor_RenderCore!FRDGParameterStruct::EnumerateUniformBuffers<`FRDGParameterStruct::GetStaticUniformBuffers'::`2'::<lambda_1> >() [RenderGraphParameters.inl:50]
UnrealEditor_RenderCore!FRDGParameterStruct::GetStaticUniformBuffers() [RenderGraphPass.cpp:32]
UnrealEditor_Renderer!TRDGLambdaPass<FTranslucentBasePassParameters,`RenderTranslucencyViewInner'::`30'::<lambda_3> >::Execute() [RenderGraphPass.h:711]
UnrealEditor_RenderCore!FRDGBuilder::ExecutePass() [RenderGraphBuilder.cpp:3452]
UnrealEditor_RenderCore!`FRDGBuilder::SetupParallelExecute'::`32'::<lambda_2>::operator() [RenderGraphBuilder.cpp:2995]
UnrealEditor_RenderCore!UE::Tasks::Private::FTaskBase::TryExecuteTask() [TaskPrivate.h:501]
UnrealEditor_RenderCore!LowLevelTasks::TTaskDelegate<LowLevelTasks::FTask * __ptr64 __cdecl(bool) [TaskDelegate.h:171]
UnrealEditor_Core!LowLevelTasks::FTask::ExecuteTask() [Task.h:627]
UnrealEditor_Core!LowLevelTasks::FScheduler::ExecuteTask() [Scheduler.cpp:244]
UnrealEditor_Core!LowLevelTasks::FScheduler::WorkerLoop() [Scheduler.cpp:516]
UnrealEditor_Core!`LowLevelTasks::FScheduler::CreateWorker'::`2'::<lambda_1>::operator() [Scheduler.cpp:75]
UnrealEditor_Core!FThreadImpl::Run() [Thread.cpp:69]
UnrealEditor_Core!FRunnableThreadWin::Run() [WindowsRunnableThread.cpp:159]

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Fixed
ComponentUE - Anim - Sequencer
Affects Versions5.65.5
Target Fix5.5.3
Fix Commit39169211
CreatedDec 12, 2024
ResolvedJan 13, 2025
UpdatedJan 24, 2025
View Jira Issue