Too big ore fields crash game when mouseover in map

[Pixdigit]

Even though in the 0.15.x infinite research on miner efficiency has been introduced I made ridiculously sized ore fields with the scenario editor.
Since the are so big they are yet not completely discovered in the map view.
However while playing if I mouseover the ore field in map view the game will crash.
And I am not able to get any error mesages in the game log files and also while starting it in a console and observing output.

Attached the save. The ore field in question is directly to the south.

[posila]

Thanks for the report.

The crash is fixed for 0.15.3, but your game might get very slow when hovering over that patch