[bug] [4.7.6]signal 11 when trying to show in file manager

I just found a bug when I try to leftclick then “show in file manager” in the project browser,
here

39237-screenshot.png

I need to precise I use dwm as window manager ( http://dwm.suckless.org/ ) which is a really simple window manager
with X.Org X Server 1.16.4 and fglrx 14.501
My only file manager is rox (ROX Desktop | ROX Desktop) and I usually call it by hand (no desktop integration)

here the log at crash:

[2015.04.18-13.48.23:147][  0]LogLoad: Full Startup: 50.92 seconds (BP compile: 0.19 seconds)
STUBBED: FLinuxPlatformProcess::IsThisApplicationForeground at /home/newin/project/UnrealEngine/Engine/Source/Runtime/Core/Private/Linux/LinuxPlatformProcess.cpp:807 (IsThisApplicationForeground)
[2015.04.18-13.48.23:696][  0]LogCrashTracker: Crashtracker disabled due to settings.
[2015.04.18-13.48.23:835][  9]LogAssetRegistry: Asset discovery search completed in 19.0409 seconds
Assertion failed: IsInRenderingThread() [File:/home/newin/project/UnrealEngine/Engine/Source/Runtime/RenderCore/Private/RenderResource.cpp] [Line: 40]
Signal 11 caught.
EngineCrashHandler: Signal=11
XIO:  fatal IO error 11 (Resource temporarily unavailable) on X server ":0"
      after 5614 requests (5614 known processed) with 26 events remaining.
XIO:  fatal IO error 11 (Resource temporarily unavailable) on X server ":0"
      after 5691 requests (5691 known processed) with 2 events remaining.
AL lib: (EE) alc_cleanup: 1 device not closed
Ensure condition failed: IsInGameThread() [File:/home/newin/project/UnrealEngine/Engine/Source/Runtime/Core/Private/Modules/ModuleManager.cpp] [Line: 24]
AL lib: (EE) alc_cleanup: 1 device not closed
Signal 11 caught.
EngineCrashHandler: Signal=11
Signal 11 caught.
EngineCrashHandler: Signal=11
pure virtual method called
terminate called without an active exception

For all custom made distros like mine it would be really nice if unreal just ask for the binary when he cannot execute it…

This might be something more interesting… I guess fork() is the culprit. FPlatfomProcess::LaunchURL() may need revisiting.

I have the same problem running gnome-nvidia build, only i get the crash randomly when working with scene geometry