4.15.1 crash with crash log. after update on linux

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after i updated my unreal engine from 4.14 to 4.15.1 by cloning the github EpicUnreal.
it crash every time i start it. i included the crash log. in hope to help the devs make the engine better.
note that the engine 4.14 worked fine.
i am running the engine on linux.
Edited to say: i love epic unreal and i would like to thank them for porting the engine to linux.

Hey samuraisora-

Can you check the drivers being used? I was able to track down a similar reported issue (Unreal Engine Issues and Bug Tracker (UE-43136)) that turned out to be an issue with conflicting drivers. If your drivers have been updated recently, please try reverting to a previous driver. If your drivers haven’t changed, then it may help to try the inverse and update your drivers.

Cheers

Doug Wilson