Error while running event visible-planets::on_tick(ID 0)
LuaRenderObject API call when LuaRenderObject was invalid.
stack traceback:
[C]: in function 'index'
__visible-planets/control_stuff/render_planets.lua:136 in function 'fancy animations'
visible-planets/control_stuff/render_planets.lua:187: in function <visible-planets/control_stuff/render_planets.lua:148>

I thought I fixed all the invalid render issues :/

Was this crash from updating, or did it happen randomly during a game? Were you doing anything in particular when it happened?

I also had this crash when I booted up a save after updating.

Well I still don't know why a planet became invalid without being removed from my internal lists, but latest version should prevent any crashes when it happens. Let me know if you have a planet randomly disappear or stop animating, as that could be what happens instead of crashing now. (Or it's fixed perfectly, /shrug)