This is a slightly common crash in 4.17. In all cases, the crash appears to occur before a project is launched. Users have not provided any description of their actions when the crash occurs.
Source Context
2938 void FSlateApplication::GeneratePathToWidgetChecked( TSharedRef< const SWidget > InWidget, FWidgetPath& OutWidgetPath, EVisibility VisibilityFilter ) const 2939 { 2940 if ( !FSlateWindowHelper::FindPathToWidget(SlateWindows, InWidget, OutWidgetPath, VisibilityFilter) ) 2941 { 2942 const bool bWasFound = FSlateWindowHelper::FindPathToWidget(SlateVirtualWindows, InWidget, OutWidgetPath, VisibilityFilter); 2943 ***** check(bWasFound); 2944 } 2945 }
repro steps currently unknown
Assertion failed: bWasFound [File:D:\Build\++UE4+Release-4.17+Compile\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp] [Line: 2944] UE4Editor_Slate!FSlateApplication::GeneratePathToWidgetChecked() [slateapplication.cpp:2944] UE4Editor_Slate!FSlateApplication::AddModalWindow() [slateapplication.cpp:2026] UE4Editor_UnrealEd!UEditorEngine::EditorAddModalWindow() [editorengine.cpp:3845] UE4Editor_UnrealEd!SOutputLogDialog::Open() [soutputlogdialog.cpp:45] UE4Editor_GameProjectGeneration!GameProjectUtils::BuildCodeProject() [gameprojectutils.cpp:2040] UE4Editor_GameProjectGeneration!SNewProjectWizard::CreateAndOpenProject() [snewprojectwizard.cpp:1496] UE4Editor_GameProjectGeneration!TBaseSPMethodDelegateInstance<0,SNewProjectWizard,0,void __cdecl() [delegateinstancesimpl.h:434] UE4Editor_AppFramework!SWizard::HandleFinishButtonClicked() [swizard.cpp:287] UE4Editor_AppFramework!TMemberFunctionCaller<SWizard,FReply() [delegateinstanceinterface.h:165] UE4Editor_AppFramework!UE4Tuple_Private::TTupleImpl<TIntegerSequence<unsigned int> >::ApplyAfter<TMemberFunctionCaller<SWizard,FReply() [tuple.h:497] UE4Editor_AppFramework!TBaseSPMethodDelegateInstance<0,SWizard,0,FReply __cdecl() [delegateinstancesimpl.h:327] UE4Editor_Slate!TBaseDelegate<FReply>::Execute() [delegatesignatureimpl.inl:537] UE4Editor_Slate!SButton::OnMouseButtonUp() [sbutton.cpp:282] UE4Editor_Slate!<lambda_1002768c627006711ef2f351a87ec0e7>::operator() [slateapplication.cpp:5199] UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FToLeafmostPolicy,FPointerEvent,<lambda_1002768c627006711ef2f351a87ec0e7> >() [slateapplication.cpp:232] UE4Editor_Slate!FSlateApplication::RoutePointerUpEvent() [slateapplication.cpp:5188] UE4Editor_Slate!FSlateApplication::ProcessMouseButtonUpEvent() [slateapplication.cpp:5690] UE4Editor_Slate!FSlateApplication::OnMouseUp() [slateapplication.cpp:5670] UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() [windowsapplication.cpp:1718] UE4Editor_Core!FWindowsApplication::DeferMessage() [windowsapplication.cpp:2161] UE4Editor_Core!FWindowsApplication::ProcessMessage() [windowsapplication.cpp:881] UE4Editor_Core!FWindowsApplication::AppWndProc() [windowsapplication.cpp:721] user32!UserCallWinProcCheckWow() user32!DispatchMessageWorker() UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() [windowsplatformmisc.cpp:1009] UE4Editor!FEngineLoop::Tick() [launchengineloop.cpp:3151] 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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There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-49442 in the post.
| 0 |
| Component | UE - Editor - UI Systems - Slate |
|---|---|
| Affects Versions | 4.17 |
| Created | Sep 7, 2017 |
|---|---|
| Resolved | Jun 4, 2018 |
| Updated | Feb 7, 2020 |