Unreal Engine Issues and Bug Tracker (UE-26081)

Developer Notes

This issue has been closed as 'Won't Fix' due to an extended period of time without updates. If this issue is important to you please let us know by posting on the AnswerHub or UDN, and Epic will re-open the ticket for further review.

Questions & Answers

Description

The editor will crash if the Window menu button next to Edit is pressed after compiling a toolbar plugin through the editor and attempting to click/use it.

Steps to Reproduce

Open UE4Editor (any project)
Add new Toolbar Button plugin to the project through the plugin wizard (named MyPlugin)
Close the editor
Build project in Visual Studio
Reopen the editor
In MyPlugin.cpp, add the following to FMyPluginModule::PluginButtonClicked()
```
UE_LOG(LogTemp, Warning, TEXT("Some message"));
```
In the editor navigate to Window->Developer Tools->Modules
Find MyPluging and press Recompile
When the compile finishes, press the toolbar button for MyPlugin
Press the Window drop-down button

Result:
Editor crashes with attached callstack after clicking Window

Callstack

MachineId:9FA88CA44B7C623122B0039D6C8BA1B0
EpicAccountId:c807849e05a0413d99e379f2802cae9c

Unknown exception - code 00000001 (first/second chance not available)

"Assertion failed: IsValid() [File:C:\Program Files (x86)\Epic Games\4.10\Engine\Source\Runtime\Core\Public\Templates\SharedPointer.h] [Line: 728] 
"

UE4Editor_Core!FDebug::AssertFailed() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\core\private\misc\outputdevice.cpp:374]
UE4Editor_Named!TCommands<FNamedCommands>::Get() [c:\program files (x86)\epic games\4.10\engine\source\runtime\slate\public\framework\commands\commands.h:61]
UE4Editor_Named!FNamedModule::AddMenuExtension() [f:\unreal projects\plugs\plugins\named\source\named\private\named.cpp:72]
UE4Editor_Named!TBaseRawMethodDelegateInstance<0,FNamedModule,void __cdecl(FMenuBuilder & __ptr64)>::ExecuteIfSafe() [c:\program files (x86)\epic games\4.10\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:582]
UE4Editor_Slate!FExtender::Apply() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\slate\private\framework\multibox\multiboxextender.cpp:191]
UE4Editor_Slate!FMenuBuilder::ApplyHook() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\slate\private\framework\multibox\multiboxbuilder.cpp:289]
UE4Editor_Slate!FMenuBuilder::EndSection() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\slate\private\framework\multibox\multiboxbuilder.cpp:195]
UE4Editor_MainFrame!FMainMenu::FillWindowMenu() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\editor\mainframe\private\menus\mainmenu.cpp:284]
UE4Editor_MainFrame!TBaseStaticDelegateInstance<TTypeWrapper<void> __cdecl(FMenuBuilder & __ptr64),TSharedRef<FExtender,0>,TSharedPtr<FTabManager,0> >::Execute() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:854]
UE4Editor_Slate!SMenuEntryBlock::MakeNewMenuWidget() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\slate\private\framework\multibox\smenuentryblock.cpp:1294]
UE4Editor_Slate!TMemberFunctionCaller<SMenuEntryBlock,TSharedRef<SWidget,0> (__cdecl SMenuEntryBlock::*)(void)const __ptr64>::operator()<>() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\core\public\delegates\delegateinstanceinterface_variadics.h:161]
UE4Editor_Slate!TTupleImpl<TIntegerSequence<> >::ApplyAfter_ExplicitReturnType<TSharedRef<SWidget,0>,TMemberFunctionCaller<SMenuEntryBlock,TSharedRef<SWidget,0> (__cdecl SMenuEntryBlock::*)(void)const __ptr64> >() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\core\public\delegates\tuple.h:113]
UE4Editor_Slate!TBaseSPMethodDelegateInstance<1,SMenuEntryBlock,0,TSharedRef<SWidget,0> __cdecl(void)>::Execute() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:282]
UE4Editor_Slate!TBaseDelegate<TSharedRef<SWidget,0> >::Execute() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\core\public\delegates\delegatesignatureimpl_variadics.inl:440]
UE4Editor_Slate!SMenuAnchor::SetIsOpen() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\slate\private\widgets\input\smenuanchor.cpp:294]
UE4Editor_Slate!SMenuEntryBlock::OnClicked() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\slate\private\framework\multibox\smenuentryblock.cpp:996]
UE4Editor_Slate!SMenuEntryBlock::OnMenuItemButtonClicked() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\slate\private\framework\multibox\smenuentryblock.cpp:927]
UE4Editor_Slate!TMemberFunctionCaller<SMenuEntryBlock,FReply (__cdecl SMenuEntryBlock::*)(void) __ptr64>::operator()<>() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\core\public\delegates\delegateinstanceinterface_variadics.h:161]
UE4Editor_Slate!TTupleImpl<TIntegerSequence<> >::ApplyAfter_ExplicitReturnType<FReply,TMemberFunctionCaller<SMenuEntryBlock,FReply (__cdecl SMenuEntryBlock::*)(void) __ptr64> >() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\core\public\delegates\tuple.h:113]
UE4Editor_Slate!TBaseSPMethodDelegateInstance<0,SMenuEntryBlock,0,FReply __cdecl(void)>::Execute() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:282]
UE4Editor_Slate!TBaseDelegate<FReply>::Execute() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\core\public\delegates\delegatesignatureimpl_variadics.inl:440]
UE4Editor_Slate!SButton::OnMouseButtonDown() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\slate\private\widgets\input\sbutton.cpp:180]
UE4Editor_Slate!<lambda_fe59d5648f2f8779b5db8a4c6c6e3cfd>::operator()() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4196]
UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FBubblePolicy,FPointerEvent,<lambda_fe59d5648f2f8779b5db8a4c6c6e3cfd> >() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:214]
UE4Editor_Slate!FSlateApplication::RoutePointerDownEvent() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4185]
UE4Editor_Slate!FSlateApplication::ProcessMouseButtonDownEvent() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4143]
UE4Editor_Slate!FSlateApplication::OnMouseDown() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4079]
UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\core\private\windows\windowsapplication.cpp:1354]
UE4Editor_Core!FWindowsApplication::DeferMessage() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\core\private\windows\windowsapplication.cpp:1721]
UE4Editor_Core!FWindowsApplication::ProcessMessage() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\core\private\windows\windowsapplication.cpp:719]
UE4Editor_Core!FWindowsApplication::AppWndProc() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\core\private\windows\windowsapplication.cpp:641]
user32
user32
UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\core\private\windows\windowsplatformmisc.cpp:884]
UE4Editor!FEngineLoop::Tick() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\launch\private\launchengineloop.cpp:2391]
UE4Editor!GuardedMain() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\launch\private\launch.cpp:142]
UE4Editor!GuardedMainWrapper() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor!WinMain() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\launch\private\windows\launchwindows.cpp:200]
UE4Editor!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:264]
kernel32
ntdll

Community References

Plugin reload crash

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Won't Fix

Component	UE - Foundation - Cpp Tools - Plugin System
Affects Versions	4.10.2

Created	Jan 27, 2016
Resolved	Jan 13, 2017
Updated	Nov 26, 2018

UE-26081

Editor crash when attempting to access Window menu bar after compiling plugin through the editor

Editor crash when attempting to access Window menu bar after compiling plugin through the editor

Developer Notes

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