Okay so Im working on reproducing some of the bugs I have been experiencing, this one I only just noticed whilst looking in my logs directory for the dumps and I see a 1.2gb log file filled with the bottom line.
[3592.70] LogWindows:Error: appError called: Assertion failed: !GMainThreadBlockedOnRenderThread || !IsInGameThread() [File:D:\BuildFarm\buildmachine_$$depot$UE4-Rocket\Engine\Source\Runtime\RenderCore\Public\RenderingThread.h] [Line: 46]
Stack:
Address = 0xf5cf8206 (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor-Core.dll]
Address = 0xf5c59ff1 (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor-Core.dll]
Address = 0xe5841975 (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor-Engine.dll]
Address = 0xf697a349 (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor-Slate.dll]
Address = 0xf6978505 (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor-Slate.dll]
Address = 0xf5ccf600 (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor-Core.dll]
Address = 0xf5cc0e22 (filename not found) [in C:\Program Files\Rocket\Engine\Binaries\Win64\RocketEditor-Core.dll]
Address = 0x76e09bd1 (filename not found) [in C:\Windows\system32\USER32.dll]
Address = 0x76e03bfc (filename not found) [in C:\Windows\system32\USER32.dll]
Address = 0x76e03b78 (filename not found) [in C:\Windows\system32\USER32.dll]
Address = 0x7ffe540 (filename not found) [in C:\Users\00zX\AppData\Local\Temp\ammemb64.dll]
Address = 0x8042729 (filename not found) [in C:\Users\00zX\AppData\Local\Temp\ammemb64.dll]
Address = 0x34d0058 (filename not found)
Address = 0x889a090 (filename not found)
Address = 0x5220b6 (filename not found)
Address = 0x6db860 (filename not found)
Address = 0x6db840 (filename not found)
Address = 0x6db840 (filename not found)
[3592.70] LogWindows:Error: Windows GetLastError: The operation completed successfully. (0)
[3592.87] LogSlate: Slate: Had to block on waiting for a draw buffer
I think it is happening when I play in editor combined with right clicking on the taskbar and do show desktop. I have dump files and tried to upload them but it didnt let me.