I’ve been having a problem where cores that are set up not to use any shaders (mupen64plus in this case) will crash RetroArch.
It goes as follows: I run mupen64plus and it works perfectly. Then I run a different core, say, nestopia, where I’m using one of those crt shaders, then I try to run mupen64plus again and retroarch crashes. This behavior can be replicated with any core and any shader as far as I can tell. The shader cores will break the non-shaders.