This set-up has a roach walking on to a pressure plate. The plate will activate the fire trap with the powder keg, causing an explosion that kills the roach and hits the orb. This crashes the game if the orb is BOTH cracked AND toggles the same fire trap that triggered the explosion.
Using this set-up, the game will NOT crash if the orb is not cracked, or if the cracked orb toggles another fire trap while ignoring the trap that caused the explosion.
Attached is a quick one-room hold that shows the four cases of cracked/uncracked orb toggling each of the two fire traps. On my computer the game only crashes in the 4th case (cracked orb toggles the fire trap that contained the powder keg.)
I am running windows 7, running The Second Sky version 5.0.1.6060
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106th Skywatcher