Get a crash after launching VRPreview. Using VR device is HTC Vive. Not stable, as I can’t reproduce this again.
Engine ver 4.18.0.
Seemd like problem in this line:
TArray<FWidgetAndPointer> WidgetsAndCursors = Window->GetHittestGrid()->GetBubblePath(ScreenspaceMouseCoordinate, GetCursorRadius(), bIgnoreEnabledStatus);
Window->GetHittestGrid() returned HittestGrid variable which containing suspicious value:
HittestGrid Ptr=0x00000169b7e4c130, SharedRefs=-572662306, WeakRefs=-572662307, Object={WidgetsCachedThisFrame=Ptr=0x00000169b7e4d7b0, SharedRefs=???, WeakRefs=???, Object={...} Cells=Invalid ...} TSharedRef<FHittestGrid,0>
Call Stack:
UE4Editor-Slate-Win64-Debug.dll!TSharedRef<FHittestGrid,0>::~TSharedRef<FHittestGrid,0>() C++
> UE4Editor-Slate-Win64-Debug.dll!FSlateApplication::LocateWidgetInWindow(FVector2D ScreenspaceMouseCoordinate={...}, const TSharedRef<SWindow,0> & Window={...}, bool bIgnoreEnabledStatus=false) Line 1872 C++
UE4Editor-Slate-Win64-Debug.dll!FSlateApplication::LocateWindowUnderMouse(FVector2D ScreenspaceMouseCoordinate={...}, const TArray<TSharedRef<SWindow,0>,FDefaultAllocator> & Windows={...}, bool bIgnoreEnabledStatus=false) Line 1163 C++
UE4Editor-Slate-Win64-Debug.dll!FSlateApplication::ProcessMouseMoveEvent(FPointerEvent & MouseEvent={...}, bool bIsSynthetic=true) Line 5957 C++
UE4Editor-Slate-Win64-Debug.dll!FSlateApplication::SynthesizeMouseMove() Line 3925 C++
UE4Editor-Slate-Win64-Debug.dll!FSlateApplication::TickApplication(ESlateTickType TickType=All, float DeltaTime=0.0289382152) Line 1718 C++
UE4Editor-Slate-Win64-Debug.dll!FSlateApplication::Tick(ESlateTickType TickType=All) Line 1595 C++
UE4Editor-Win64-Debug.exe!FEngineLoop::Tick() Line 3378 C++
UE4Editor-Win64-Debug.exe!EngineTick() Line 63 C++
UE4Editor-Win64-Debug.exe!GuardedMain(const wchar_t * CmdLine=0x0000016880af2d7c, HINSTANCE__ * hInInstance=0x00007ff760070000, HINSTANCE__ * hPrevInstance=0x0000000000000000, int nCmdShow=10) Line 169 C++
UE4Editor-Win64-Debug.exe!WinMain(HINSTANCE__ * hInInstance=0x00007ff760070000, HINSTANCE__ * hPrevInstance=0x0000000000000000, char * __formal=0x0000016880af3e72, int nCmdShow=10) Line 199 C++
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