BUG: Crashing due to an illegal operation!

Backtrace for BYOND 510.1346 on Linux:
Generated at Sun Dec  4 12:10:13 2016

DreamDaemon [0x8048000, 0x0], [0x8048000, 0x804bb24]
libbyond.so [0xf7271000, 0x0], 0x20d834
 [0xf77b2000, 0xf77b2bd0], [0xf77b2000, 0xf77b2bd0]
libbyond.so [0xf7271000, 0x0], 0x20d834
libbyond.so [0xf7271000, 0x0], 0x21077e
libbyond.so [0xf7271000, 0x0], 0x214ae1
libbyond.so 0x32e770, 0x32e88a
libbyond.so 0x2f8600, 0x2f8802
DreamDaemon [0x8048000, 0x0], [0x8048000, 0x804ae34]
libc.so.6 0x18540, 0x18637 (__libc_start_main)
DreamDaemon [0x8048000, 0x0], [0x8048000, 0x804a731]

Recent proc calls:
/datum/subsystem/garbage_collector/proc/QueueForQueuing
/atom/movable/proc/has_buckled_mobs
/atom/movable/proc/unbuckle_all_mobs
/atom/proc/handle_atom_del
/datum/proc/Destroy
/atom/Destroy
/atom/movable/Destroy
/atom/movable/Destroy
/proc/qdel
/atom/movable/Destroy
/mob/proc/ghostize
/mob/proc/spellremove
/datum/subsystem/garbage_collector/proc/QueueForQueuing
/datum/proc/Destroy
/proc/qdel
/datum/subsystem/garbage_collector/proc/QueueForQueuing

To help the BYOND developers debug this, please send the above trace as part
of a very detailed bug report: http://www.byond.com/members/?command=view_tracker&tracker=1