After moving the combinator, crahs occured. See the link for screenshot and save file. Just move the combinator you will see and the game crashes. If you wouldnt be able to reproduce it, I could upload the rest of the mods I am using.
https://drive.google.com/open?id=0ByBbueKcmWaedU9OVVVURzN1c1E

Do you have the latest version, 2.5?
Because Nexela released like 30 mins before your post and I think it was supposed to solve a problem moving combinators.

Yeah, I have it updated. Havent had problems with crashes before, but I didnt really use this feature much until now.

I doh'd again :) Fixed for 2.5.3 (This may not be released until factorio .15.10)