Game crashes (while caluclating temperature?)

I have a save game, where my game always crashes after a few moments.

The output_log says 

Quote

Calculated an invalid temperature: t1=NaN, m1=0.02453179, t2=0, m2=0, min_temp=0, max_temp=0

I attached the who output.log and the savegame.

I fixed it when I deleted the not-yet-built pipes directly under the spawner and then set them again.

The Yucky Crew Tag 3.sav