Description

If a user places a 3d widget in to the level it will cause a crash when moved with the movement arrows.

Steps to Reproduce
  1. Open the editor
  2. Create new widget blueprint
  3. Add a button to the designer tab
  4. Compile and save
  5. Create a new actor blueprint
  6. Add widget component to the actor
  7. Set the new widget blueprint as the class for the widget component
  8. Add actor to the level
  9. Move actor up
  10. Notice the editor crashes
Callstack
MachineId:E74C21034048BDD873CC6C9A3913CF6C
EpicAccountId:ccbf39de6f9245c0aa23f8e57cc8a566

Assertion failed: IsInGameThread() [File:D:\BuildFarm\buildmachine_++UE4+Release-4.11\Engine\Source\Runtime\RenderCore\Private\RenderingThread.cpp] [Line: 922] 



UE4Editor_Core!FDebug::AssertFailed() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\core\private\misc\outputdevice.cpp:430]
UE4Editor_RenderCore!FPendingCleanupObjects::FPendingCleanupObjects() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\rendercore\private\renderingthread.cpp:923]
UE4Editor_RenderCore!FlushRenderingCommands() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\rendercore\private\renderingthread.cpp:880]
UE4Editor_SlateRHIRenderer!FSlateRHIRenderingPolicy::~FSlateRHIRenderingPolicy() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\slaterhirenderer\private\slaterhirenderingpolicy.cpp:40]
UE4Editor_SlateRHIRenderer!FSlateRHIRenderingPolicy::`scalar deleting destructor'()
UE4Editor_SlateRHIRenderer!FSlate3DRenderer::~FSlate3DRenderer() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\slaterhirenderer\private\slate3drenderer.cpp:29]
UE4Editor_SlateRHIRenderer!FSlate3DRenderer::`scalar deleting destructor'()
UE4Editor_UMG!TGraphTask<`FWidgetRenderer::DrawWindow'::`2'::EURCMacro_FWidgetRenderer_DrawWindow>::ExecuteTask() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\core\public\async\taskgraphinterfaces.h:887]
UE4Editor_Core!FNamedTaskThread::ProcessTasksNamedThread() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\core\private\async\taskgraph.cpp:779]
UE4Editor_Core!FNamedTaskThread::ProcessTasksUntilQuit() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\core\private\async\taskgraph.cpp:526]
UE4Editor_RenderCore!RenderingThreadMain() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\rendercore\private\renderingthread.cpp:310]
UE4Editor_RenderCore!FRenderingThread::Run() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\rendercore\private\renderingthread.cpp:417]
UE4Editor_Core!FRunnableThreadWin::Run() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:74]

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Cannot Reproduce
ComponentTools - UMG
Affects Versions4.11
Target Fix4.11
Fix Commit2842339
Main Commit2857187
CreatedJan 18, 2016
ResolvedJan 25, 2016
UpdatedJun 20, 2016