Drag notify state causing crash

[Noah_Z]

This bug happens to me(and lots of my colleagues) today.

In any animation, place a trailer or a timed particle effect notify state.

Select the PSTemplate, any template, and select a socket name.

Drag the notify state, and boom!

here is the log:

MachineId:751C978D45F929B58691418CF09ADA64
EpicAccountId:6d28933e02f94b75a9f8421bb8d4f9dd

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

"Assertion failed: CurrentDragHandle
!= ENotifyStateHandleHit::None
[File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.10\Engine\Source\Editor\Persona\Private\SAn

UE4Editor_Core!FDebug::AssertFailed()
[d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\core\private\misc\outputdevice.cpp:374]
UE4Editor_Persona!SAnimNotifyNode::OnMouseMove()
[d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\editor\persona\private\sanimnotifypanel.cpp:1472]
UE4Editor_Slate!::operator()()
[d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4466]
UE4Editor_Slate!FEventRouter::Route

() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:214]
UE4Editor_Slate!FSlateApplication::RoutePointerMoveEvent()
[d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4470]
UE4Editor_Slate!FSlateApplication::ProcessMouseMoveEvent()
[d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4817]
UE4Editor_Slate!FSlateApplication::OnMouseMove()
[d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4769]
UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage()
[d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\core\private\windows\windowsapplication.cpp:1463]
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

It just works fine yesterday. So this is maybe conflict with some microsoft updates.

[anonymous_user_280dd372]

Hi Noah_Z,

I reproduced this crash in 4.10 and tracked it down in our system. However, I was unable to reproduce in 4.12 and see no Crash Reports for this past 4.10. I can’t enter a bug report for this because of that. Thank you for reporting it though.

[anonymous_user_6105c94f]

i can confirm its still happens in 4.16, although with different a normal notify. was fine but suddenly started happening. if this hasnt been tracked then its possible its still around in 4.18