Unreal Engine Issues and Bug Tracker (UE-70562)

Description

Crash after deleting Editor Utility Widget and accessing from Window menu

Steps to Reproduce

For a visual step by step reproduction of this case, please see the following user submitted video. [Link Removed]

Create a new Blueprint Project in Unreal Engine 4.22
Right click the content browser and create a new Editor Utility Widget "Testing"
Add a Checkbox to the Canvas Panel-> Compile & Save.
Exit the "Testing" Editor Utillity Widget window.
In the Editor scene view, select Window-> Editor Utillity Widgets-> Testing
Confirm the Window pop ups with Check box-> Exit Window
Delete Testing Editor Utillity Widget.
In the Editor scene view, select Window-> Editor Utillity Widgets-> Testing

Result: Crash, see call Stack.

Expected: No longer able to access editor UI slate container that has deleted variable.

Callstack

LoginId:677a448d48352201d90930b796056d79
 EpicAccountId:74cb1785c0a148f0a87ef74601ae977a
Unhandled exception
UE4Editor_Blutility
 UE4Editor_Blutility
 UE4Editor_Blutility
 UE4Editor_Slate
 UE4Editor_Slate
 UE4Editor_Slate
 UE4Editor_Slate
 UE4Editor_Slate
 UE4Editor_Slate
 UE4Editor_Slate
 UE4Editor_Slate
 UE4Editor_Slate
 UE4Editor_Slate
 UE4Editor_Slate
 UE4Editor_Slate
 UE4Editor_Slate
 UE4Editor_Slate
 UE4Editor_ApplicationCore
 UE4Editor_ApplicationCore
 UE4Editor_ApplicationCore
 UE4Editor_ApplicationCore
 user32
 user32
 UE4Editor_ApplicationCore
 UE4Editor
 UE4Editor
 UE4Editor
 UE4Editor
 UE4Editor
 kernel32
 ntdll

[2019.03.05-15.24.31:811][629]LogWindows: Error: === Critical error: ===
[2019.03.05-15.24.31:811][629]LogWindows: Error: 
[2019.03.05-15.24.31:811][629]LogWindows: Error: Fatal error!
[2019.03.05-15.24.31:811][629]LogWindows: Error: 
[2019.03.05-15.24.31:811][629]LogWindows: Error: Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x00000040
[2019.03.05-15.24.31:811][629]LogWindows: Error: 
[2019.03.05-15.24.31:811][629]LogWindows: Error: [Callstack] 0x00007ffde8acf27c UE4Editor-Blutility.dll!UEditorUtilityWidgetBlueprint::CreateUtilityWidget() [d:\build\++ue4\sync\engine\source\editor\blutility\private\editorutilitywidgetblueprint.cpp:57]
[2019.03.05-15.24.31:811][629]LogWindows: Error: [Callstack] 0x00007ffde8ae24cf UE4Editor-Blutility.dll!UEditorUtilityWidgetBlueprint::SpawnEditorUITab() [d:\build\++ue4\sync\engine\source\editor\blutility\private\editorutilitywidgetblueprint.cpp:44]
[2019.03.05-15.24.31:812][629]LogWindows: Error: [Callstack] 0x00007ffde8ad298a UE4Editor-Blutility.dll!TBaseUObjectMethodDelegateInstance<0,UEditorUtilityWidgetBlueprint,TSharedRef<SDockTab,0> __cdecl(FSpawnTabArgs const &)>::Execute() [d:\build\++ue4\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:617]
[2019.03.05-15.24.31:812][629]LogWindows: Error: [Callstack] 0x00007ffe1a8cc5a9 UE4Editor-Slate.dll!FTabManager::SpawnTab() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\docking\tabmanager.cpp:1416]
[2019.03.05-15.24.31:812][629]LogWindows: Error: [Callstack] 0x00007ffe1a89ec1f UE4Editor-Slate.dll!FTabManager::InvokeTab_Internal() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\docking\tabmanager.cpp:1139]
[2019.03.05-15.24.31:812][629]LogWindows: Error: [Callstack] 0x00007ffe1a89e6ae UE4Editor-Slate.dll!FTabManager::InvokeTab() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\docking\tabmanager.cpp:1089]
[2019.03.05-15.24.31:812][629]LogWindows: Error: [Callstack] 0x00007ffe1a89e848 UE4Editor-Slate.dll!FTabManager::InvokeTabForMenu() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\docking\tabmanager.cpp:1194]
[2019.03.05-15.24.31:812][629]LogWindows: Error: [Callstack] 0x00007ffe1a88b15f UE4Editor-Slate.dll!TBaseSPMethodDelegateInstance<0,FTabManager,0,void __cdecl(void),FName>::ExecuteIfSafe() [d:\build\++ue4\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:355]
[2019.03.05-15.24.31:812][629]LogWindows: Error: [Callstack] 0x00007ffe1a8a8baf UE4Editor-Slate.dll!SMenuEntryBlock::OnClicked() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\multibox\smenuentryblock.cpp:1037]
[2019.03.05-15.24.31:812][629]LogWindows: Error: [Callstack] 0x00007ffe1a8af350 UE4Editor-Slate.dll!SMenuEntryBlock::OnMenuItemButtonClicked() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\multibox\smenuentryblock.cpp:988]
[2019.03.05-15.24.31:812][629]LogWindows: Error: [Callstack] 0x00007ffe1a88a284 UE4Editor-Slate.dll!TBaseSPMethodDelegateInstance<0,SMenuEntryBlock,0,FReply __cdecl(void)>::Execute() [d:\build\++ue4\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:279]
[2019.03.05-15.24.31:812][629]LogWindows: Error: [Callstack] 0x00007ffe1a9429d2 UE4Editor-Slate.dll!SButton::OnMouseButtonUp() [d:\build\++ue4\sync\engine\source\runtime\slate\private\widgets\input\sbutton.cpp:293]
[2019.03.05-15.24.31:812][629]LogWindows: Error: [Callstack] 0x00007ffe1a8b0c55 UE4Editor-Slate.dll!SMenuEntryButton::OnMouseButtonUp() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\multibox\smenuentryblock.cpp:385]
[2019.03.05-15.24.31:812][629]LogWindows: Error: [Callstack] 0x00007ffe1a794021 UE4Editor-Slate.dll!FEventRouter::Route<FReply,FEventRouter::FToLeafmostPolicy,FPointerEvent,<lambda_6c1f6b862bcfb82ea6dcab28fbcc9463> >() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:271]
[2019.03.05-15.24.31:812][629]LogWindows: Error: [Callstack] 0x00007ffe1a8102c1 UE4Editor-Slate.dll!FSlateApplication::RoutePointerUpEvent() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5594]
[2019.03.05-15.24.31:812][629]LogWindows: Error: [Callstack] 0x00007ffe1a7faa8a UE4Editor-Slate.dll!FSlateApplication::ProcessMouseButtonUpEvent() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:6199]
[2019.03.05-15.24.31:812][629]LogWindows: Error: [Callstack] 0x00007ffe1a7f03d4 UE4Editor-Slate.dll!FSlateApplication::OnMouseUp() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:6172]
[2019.03.05-15.24.31:812][629]LogWindows: Error: [Callstack] 0x00007ffe4344b8e0 UE4Editor-ApplicationCore.dll!FWindowsApplication::ProcessDeferredMessage() [d:\build\++ue4\sync\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:1842]
[2019.03.05-15.24.31:812][629]LogWindows: Error: [Callstack] 0x00007ffe4343ef9f UE4Editor-ApplicationCore.dll!FWindowsApplication::DeferMessage() [d:\build\++ue4\sync\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:2292]
[2019.03.05-15.24.31:812][629]LogWindows: Error: [Callstack] 0x00007ffe4344d77f UE4Editor-ApplicationCore.dll!FWindowsApplication::ProcessMessage() [d:\build\++ue4\sync\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:1522]
[2019.03.05-15.24.31:812][629]LogWindows: Error: [Callstack] 0x00007ffe4343c090 UE4Editor-ApplicationCore.dll!FWindowsApplication::AppWndProc() [d:\build\++ue4\sync\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:772]
[2019.03.05-15.24.31:812][629]LogWindows: Error: [Callstack] 0x00007ffe629e6d41 USER32.dll!UnknownFunction []
[2019.03.05-15.24.31:812][629]LogWindows: Error: [Callstack] 0x00007ffe629e6713 USER32.dll!UnknownFunction []
[2019.03.05-15.24.31:812][629]LogWindows: Error: [Callstack] 0x00007ffe4344e946 UE4Editor-ApplicationCore.dll!FWindowsPlatformApplicationMisc::PumpMessages() [d:\build\++ue4\sync\engine\source\runtime\applicationcore\private\windows\windowsplatformapplicationmisc.cpp:130]
[2019.03.05-15.24.31:812][629]LogWindows: Error: [Callstack] 0x00007ff6599f5d3e UE4Editor.exe!FEngineLoop::Tick() [d:\build\++ue4\sync\engine\source\runtime\launch\private\launchengineloop.cpp:3882]
[2019.03.05-15.24.31:812][629]LogWindows: Error: [Callstack] 0x00007ff659a0554c UE4Editor.exe!GuardedMain() [d:\build\++ue4\sync\engine\source\runtime\launch\private\launch.cpp:168]
[2019.03.05-15.24.31:812][629]LogWindows: Error: [Callstack] 0x00007ff659a055ca UE4Editor.exe!GuardedMainWrapper() [d:\build\++ue4\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:145]
[2019.03.05-15.24.31:812][629]LogWindows: Error: [Callstack] 0x00007ff659a1315c UE4Editor.exe!WinMain() [d:\build\++ue4\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:275]
[2019.03.05-15.24.31:812][629]LogWindows: Error: [Callstack] 0x00007ff659a15b7e UE4Editor.exe!__scrt_common_main_seh() [d:\agent\_work\3\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288]
[2019.03.05-15.24.31:812][629]LogWindows: Error: [Callstack] 0x00007ffe62b93dc4 KERNEL32.DLL!UnknownFunction []
[2019.03.05-15.24.31:812][629]LogWindows: Error: [Callstack] 0x00007ffe653d3691 ntdll.dll!UnknownFunction []
[2019.03.05-15.24.31:812][629]LogWindows: Error:

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Fixed

Component	Tools
Affects Versions	4.22
Target Fix	4.22

Fix Commit	5296227
Main Commit	5308904
Release Commit	5296227

Created	Feb 25, 2019
Resolved	Mar 5, 2019
Updated	Mar 26, 2019

UE-70562

Crash after deleting Editor Utility Widget and accessing it from Window menu

Crash after deleting Editor Utility Widget and accessing it from Window menu

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