You cannot expand overlays length through setting its len.
Created by: eswordthecat
Tested by putting debug messages.
overlays.len = 0 overlays.len = overlays_standing.len icon = stand_icon
src << "[overlays.len], [overlays_standing.len], 1"
for(var/overlay in overlays_standing) if(overlay) overlays += overlay
src << "[overlays.len], [overlays_standing.len], 2"
0, 25, 1 9, 25, 2