Removing the save file, as the issue is resolved, and it's taking up space on my repo.

Was fiddling around with my trains:

http://i.imgur.com/EZaRmA8.png

when I headed from my location in the image down to a train sitting just west of the stations seen in the bottom left, I hovered over the train engine, and the game crashed:

factorio-current.log:
0.001 2015-08-24 22:35:37 ...