This appears to sometimes runtime when the target stationary port is
somehow a different size to the ripple port. The code had an out of
bounds check of a sort, but it doesn't actually work because the array
accesses runtime instead of returning a null
As to why the turfs available were not the same? most likely because the
bounds overlapped the world edge due to a fuck huge shuttle.
I have a feeling even if this proc completes something would fail later
anyway.
edit: oh so it was the lance shuttle which is fuck hueg
#79961 is related but not fixed by this.