[Crash + Repro] Content Examples Project Causing Crash 4.4.2

To Reproduce:

  • Create a new content examples project.
  • Try to drag the content browser window before the project has completely loaded.

This crash is NOT specific to the content examples project. It’s a new crash introduced sometime during 4.4’s development.

Recieve following callstack:

!Id:c87a4f3d7a5d659fb91c8aa4bafe74fd

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

Assertion failed: WidgetMapToItem.Num() == ItemsWithGeneratedWidgets.Num() [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.4\Engine\Source\Runtime\Slate\Public\Widgets\Views\SListView.h] [Line: 464]
WidgetMapToItem length (136) does not m

KERNELBASE + 37901 bytes
UE4Editor_Core + 3095292 bytes
UE4Editor_Core + 1661738 bytes
UE4Editor_Core + 1541824 bytes
UE4Editor_ContentBrowser + 1577877 bytes
UE4Editor_ContentBrowser + 1696873 bytes
UE4Editor_Slate + 3549190 bytes
UE4Editor_SlateCore + 675874 bytes
UE4Editor_SlateCore + 676018 bytes
UE4Editor_SlateCore + 676018 bytes
UE4Editor_SlateCore + 676018 bytes
UE4Editor_SlateCore + 676018 bytes
UE4Editor_SlateCore + 676018 bytes
UE4Editor_SlateCore + 676018 bytes
UE4Editor_SlateCore + 676018 bytes
UE4Editor_SlateCore + 676018 bytes
UE4Editor_SlateCore + 676018 bytes
UE4Editor_SlateCore + 676018 bytes
UE4Editor_SlateCore + 676018 bytes
UE4Editor_SlateCore + 676018 bytes
UE4Editor_SlateCore + 676018 bytes
UE4Editor_SlateCore + 676018 bytes
UE4Editor_SlateCore + 676018 bytes
UE4Editor_SlateCore + 676018 bytes
UE4Editor_SlateCore + 676018 bytes
UE4Editor_SlateCore + 676018 bytes
UE4Editor_SlateCore + 676018 bytes
UE4Editor_SlateCore + 676018 bytes
UE4Editor_SlateCore + 676018 bytes
UE4Editor_SlateCore + 676018 bytes
UE4Editor_SlateCore + 676018 bytes
UE4Editor_SlateCore + 676018 bytes
UE4Editor_SlateCore + 676018 bytes
UE4Editor_Slate + 902669 bytes
UE4Editor_Slate + 901177 bytes
UE4Editor!FEngineLoop::Tick() + 3397 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.4\engine\source\runtime\launch\private\launchengineloop.cpp:2115]
UE4Editor!GuardedMain() + 476 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.4\engine\source\runtime\launch\private\launch.cpp:133]
UE4Editor!GuardedMainWrapper() + 26 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.4\engine\source\runtime\launch\private\windows\launchwindows.cpp:125]
UE4Editor!WinMain() + 249 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.4\engine\source\runtime\launch\private\windows\launchwindows.cpp:201]
UE4Editor!__tmainCRTStartup() + 329 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618]

Hey TheJamsh,

I’ve been trying to reproduce this crash with no luck. You’re saying that you create a new ContentExamples project with the launcher, then you open the ContentExamples project, and when it opens up in the engine, you immediately click and drag the ContentExamples tab, which causes the engine to crash. Is that correct?

Hi TheJamsh,

We have not heard back from you in a few days, so we are marking this post as Resolved for tracking purposes. If you are still experiencing the issue you reported, please respond to this message with additional information and we will offer further assistance.

Thank you.