Falling.lua: Delete falling node entities on contact with 'ignore'

Prevents falling node entities entering the ignore at a world edge and
resting on unloaded nodes 16 nodes below, unreachable, undiggable and
still being processed by 'on step' because they don't revert to nodes.

diff --git a/builtin/game/falling.lua b/builtin/game/falling.lua
index 436350fa1931e6c7e67e76f206ad9de23cdc947c..974ba3959f747d7dcab6cdebd25bc7dd159957bf 100644 (file)
--- a/builtin/game/falling.lua
+++ b/builtin/game/falling.lua
@@ -60,8 +60,13 @@ core.register_entity(":__builtin:falling_node", {
                local pos = self.object:getpos()
                -- Position of bottom center point
                local bcp = {x = pos.x, y = pos.y - 0.7, z = pos.z}
-               -- Avoid bugs caused by an unloaded node below
+               -- 'bcn' is nil for unloaded nodes
                local bcn = core.get_node_or_nil(bcp)
+               -- Delete on contact with ignore at world edges
+               if bcn and bcn.name == "ignore" then
+                       self.object:remove()
+                       return
+               end
                local bcd = bcn and core.registered_nodes[bcn.name]
                if bcn and
                                (not bcd or bcd.walkable or