This is an infrequent crash coming out of the 4.18 release. Users have not provided any descriptions of their actions when the crash occurred.
Based on affected project names, this may be a VR issue
Source Context
39 void FSlateElementBatcher::AddElements(FSlateWindowElementList& WindowElementList)
40 {
41 SLATE_CYCLE_COUNTER_SCOPE(GSlateAddElements);
42 FPlatformMisc::BeginNamedEvent(FColor::Magenta, "Slate::AddElements");
43
44 SCOPE_CYCLE_COUNTER(STAT_SlateAddElements);
45
46 NumDrawnBatchesStat = NumDrawnBoxesStat = NumDrawnTextsStat = 0;
47
48 BatchData = &WindowElementList.GetBatchData();
49 DrawLayer = &WindowElementList.GetRootDrawLayer();
50
51 ***** FVector2D ViewportSize = WindowElementList.GetWindow()->GetViewportSize();
52
53 AddElements(WindowElementList.GetRootDrawLayer().DrawElements, ViewportSize);
repro steps currently unknown
Assertion failed: IsValid() [File:D:\Build\++UE4+Release-4.18+Compile\Sync\Engine\Source\Runtime\Core\Public\Templates/SharedPointer.h] [Line: 835] UE4Editor_SlateCore!FSlateElementBatcher::AddElements() [elementbatcher.cpp:52] UE4Editor_SlateRHIRenderer!FSlateRHIRenderer::DrawWindows_Private() [slaterhirenderer.cpp:975] UE4Editor_Slate!FSlateApplication::PrivateDrawWindows() [slateapplication.cpp:1494] UE4Editor_Slate!FSlateApplication::DrawWindows() [slateapplication.cpp:1190] UE4Editor_Slate!FSlateApplication::TickApplication() [slateapplication.cpp:1777] UE4Editor_Slate!FSlateApplication::Tick() [slateapplication.cpp:1595] UE4Editor!FEngineLoop::Tick() [launchengineloop.cpp:3378] 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()
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-52625 in the post.
| 1 |
| Component | UE - Editor - UI Systems - Slate |
|---|---|
| Affects Versions | 4.18 |
| Target Fix | 4.19 |
| Created | Nov 21, 2017 |
|---|---|
| Resolved | Nov 28, 2017 |
| Updated | Sep 16, 2019 |