Editor Crash when erasing vertex painting on terrain and exiting

In modes > Paint

Play around and paint/remove vertices with terrain.
Exit editor.

We are getting this crash on TP_FirstPerson as well.
Additionally, our artists here aren’t able to get the remove functionality to work. They can only add.
I’ll try to get more details tomorrow.



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

Assertion failed: IsValid() [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.3\Engine\Source\Runtime\Core\Public\Templates\SharedPointer.h] [Line: 658]

KERNELBASE + 23544 bytes
UE4Editor_Core + 3009491 bytes
UE4Editor_Core + 1775834 bytes
UE4Editor_Core + 1703568 bytes
UE4Editor_PlacementMode + 130925 bytes
UE4Editor_PlacementMode + 107038 bytes
UE4Editor_PlacementMode + 128932 bytes
UE4Editor_PlacementMode + 106898 bytes
UE4Editor_PlacementMode + 122887 bytes
UE4Editor_PlacementMode + 121684 bytes
UE4Editor_PlacementMode + 141189 bytes
UE4Editor_PlacementMode + 132585 bytes
UE4Editor_PlacementMode + 107178 bytes
UE4Editor_PlacementMode + 67516 bytes
UE4Editor_PlacementMode + 150145 bytes
UE4Editor_UnrealEd + 2012312 bytes
UE4Editor_UnrealEd + 2011301 bytes
UE4Editor_UnrealEd + 5343204 bytes
UE4Editor!GuardedMain() + 506 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.3\engine\source\runtime\launch\private\launch.cpp:141]
UE4Editor!GuardedMainWrapper() + 26 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.3\engine\source\runtime\launch\private\windows\launchwindows.cpp:125]
UE4Editor!WinMain() + 249 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.3\engine\source\runtime\launch\private\windows\launchwindows.cpp:207]
UE4Editor!__tmainCRTStartup() + 329 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618]


Thank you for your report. We were not able to investigate this on the engine version you reported, but there have been many version changes to UE4 since this question was first posted. With a new version of the Engine comes new fixes and it is possible that this issue has changed or may no longer occur. Due to timetable of when this issue was first posted, we are marking this post as resolved for tracking purposes.

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