This is a common crash that has occurred since at least 4.14.
The callstack is nearly identical to [Link Removed], which appears to be fixed in 4.18; and [Link Removed], which has not. The difference is that this callstack specifically references UStaticMeshThumbnailRenderer::Draw.
Users have not provided any descriptions of their actions when the crash occurred
Source Context
1600 AWorldSettings* ULevel::GetWorldSettings(bool bChecked) const 1601 { 1602 if (bChecked) 1603 { 1604 ***** checkf( WorldSettings != nullptr, *GetPathName() ); 1605 } 1606 return WorldSettings; 1607 }
repro steps currently unknown
Assertion failed: WorldSettings != nullptr [File:D:\Build\++UE4+Release-4.18+Compile\Sync\Engine\Source\Runtime\Engine\Private\Level.cpp] [Line: 1605] /Engine/Transient.World_0:PersistentLevel UE4Editor_Engine!ULevel::GetWorldSettings() [level.cpp:1605] UE4Editor_Engine!UWorld::GetWorldSettings() [world.cpp:3917] UE4Editor_Engine!UWorld::IsPaused() [leveltick.cpp:439] UE4Editor_Engine!UWorld::IsCameraMoveable() [leveltick.cpp:448] UE4Editor_Engine!FSceneViewFamily::FSceneViewFamily() [sceneview.cpp:2364] UE4Editor_UnrealEd!UStaticMeshThumbnailRenderer::Draw() [staticmeshthumbnailrenderer.cpp:33] UE4Editor_UnrealEd!ThumbnailTools::RenderThumbnail() [objecttools.cpp:3659] UE4Editor_UnrealEd!FAssetThumbnailPool::Tick() [assetthumbnail.cpp:1002] UE4Editor_UnrealEd!FTickableEditorObject::TickObjects() [tickableeditorobject.h:21] UE4Editor_UnrealEd!UEditorEngine::Tick() [editorengine.cpp:1433] UE4Editor_UnrealEd!UUnrealEdEngine::Tick() [unrealedengine.cpp:396] UE4Editor!FEngineLoop::Tick() [launchengineloop.cpp:3296] UE4Editor!GuardedMain() [launch.cpp:166] UE4Editor!GuardedMainWrapper() [launchwindows.cpp:134] UE4Editor!WinMain() [launchwindows.cpp:210] UE4Editor!__scrt_common_main_seh() [exe_common.inl:253] kernel32!BaseThreadInitThunk() ntdll!RtlUserThreadStart()
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