runtime null

[nyudenkov]

runtime error: list index out of bounds
proc name: returnPipenetAir (/obj/machinery/atmospherics/components/returnPipenetAir)
source file: components_base.dm,94
usr: null
src: the Security Post - Medbay ven... (/obj/machinery/atmospherics/components/unary/vent_pump)
src.loc: the floor (148,121,1) (/turf/simulated/floor/plasteel)
call stack:
the Security Post - Medbay ven... (/obj/machinery/atmospherics/components/unary/vent_pump): returnPipenetAir(/datum/pipeline (/datum/pipeline))
/datum/pipeline (/datum/pipeline): addMachineryMember(the Security Post - Medbay ven... (/obj/machinery/atmospherics/components/unary/vent_pump))
/datum/pipeline (/datum/pipeline): build pipeline(the air supply pipe (/obj/machinery/atmospherics/pipe/simple/supply/hidden))
the air supply pipe (/obj/machinery/atmospherics/pipe/simple/supply/hidden): build network()
Air (/datum/subsystem/air): setup pipenets(null)
Air (/datum/subsystem/air): Initialize(253935, null)