Got a SIGSEGV while executing native code - But it's not explaining anything I can understand

got this....a bunch recently when trying to play SDV. Twice when picking up a duck egg and trying to immediately swap it out with the void mayo in the mayo maker, and once trying to mine an emerald node in the quarry.


"Stacktrace:



Native stacktrace:



Debug info from gdb:


xcode-select: note: no developer tools were found at '/Applications/Xcode.app', requesting install. Choose an option in the dialog to download the command line developer tools.


=================================================================

Got a SIGSEGV while executing native code. This usually indicates

a fatal error in the mono runtime or one of the native libraries

used by your application.

=================================================================


Abort trap: 6

logout

Saving session...

...copying shared history...

...saving history...truncating history files...

...completed."



I have absolutely NO IDEA why this is happening.....seeing as I've never needed dev tools before now.....and the only theory I have is that I recently updated from yosemite to El Capitan because APPARENTLY Steam is gonna nix support for 10.10 and anything before that......and even when I put the SMAPI log into the log uploader, this never shows up in it, it ONLY shows up in Terminal. Heck, I don't even know what or WHERE this "gdb" thing is it's getting the info from....

WHAT IS GOING ON?!
(I'm getting REALLY fed up with having to pull a variant of a groundhog day)