[mac] UE4 4.19 GitHub version Editor start Error

I can compile this Version on my Mac… High Sierra 10.13.3 with Intel HD 5000. But the build Editor crashs always at 35%…
Xcode prints out many errors mainly like following.
As far as i can see, all errors are caused by /tmp/ue4_stdlib.metal:

^~~~~~~~~~~~~~~~~
/tmp/ue4_stdlib.metal:138:5: note: previous definition is here
DEFINE_TYPE_TRAITS(char, char, 1);
^
/tmp/ue4_stdlib.metal:137:65: note: expanded from macro ‘DEFINE_TYPE_TRAITS’
#define DEFINE_TYPE_TRAITS(Type, Scalar, Val) template<> struct type_traits { enum { num_components = Val }; typedef Scalar scalar_type; }
^
In file included from /tmp/1290_3198786088.metal:7:
/tmp/ue4_stdlib.metal:139:5: error: redefinition of ‘ue4::type_traits’
DEFINE_TYPE_TRAITS(uchar, uchar, 1);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/tmp/ue4_stdlib.metal:137:65: note: expanded from macro ‘DEFINE_TYPE_TRAITS’
#define DEFINE_TYPE_TRAITS(Type, Scalar, Val) template<> struct type_traits { enum { num_components = Val }; typedef Scalar scalar_type; }
^~~~~~~~~~~~~~~~~

Activating this flag in ConsoleVariables.ini helps to get a functional Editor:
; r.Shaders.Optimize=0

But i think this creates other problems. Because my packaged app build with the Editor with this flag activated, is extrem unstable… sometimes it runs, sometimes it crash with an error pointing to MetalCommandList.cpp… But sometimes even the whole mac crashs…

Anyone got an idea?

Hello,

We’ve recently made a switch to a new bug reporting method using a more structured form. Please visit the link below for more details and report the issue using the new Bug Submission Form. Feel free to continue to use this thread for community discussion around the issue.

https://forums.unrealengine.com/unreal-engine/announcements-and-releases/1410408-unreal-engine-bug-submission-form

Thanks

Thx, reported there…

Hi, I am stuck at this problem now, how did you solve the problem in the end?