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Add check for unknown nodes.

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* Check if node has a definition table before attempting to evaluate its
  attributes.
* Define local variable to cache multiple accesses to `registered_nodes[]`
  and improve readability.
This commit is contained in:
kabou 2022-03-09 14:14:45 +01:00
parent 9bac0da01a
commit 3f4dafc68f
1 changed files with 4 additions and 3 deletions
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7
mods/ITEMS/mcl_core/functions.lua
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@ -210,7 +210,8 @@ minetest.register_abm({
end
local posses = { { 1, 0 }, { -1, 0 }, { 0, 1 }, { 0, -1 } }
for _, p in pairs(posses) do
if minetest.registered_nodes[minetest.get_node(vector.new(pos.x + p[1], pos.y, pos.z + p[2])).name].walkable then
local ndef = minetest.registered_nodes[minetest.get_node(vector.new(pos.x + p[1], pos.y, pos.z + p[2])).name]
if ndef and ndef.walkable then
local posy = pos.y
while minetest.get_node(vector.new(pos.x, posy, pos.z)).name == "mcl_core:cactus" do
local pos = vector.new(pos.x, posy, pos.z)
@ -841,7 +842,7 @@ minetest.register_abm({
-- If this was mycelium, uproot plant above
if n2.name == "mcl_core:mycelium" then
local tad = minetest.registered_nodes[minetest.get_node(above).name]
if tad.groups and tad.groups.non_mycelium_plant then
if tad and tad.groups and tad.groups.non_mycelium_plant then
minetest.dig_node(above)
end
end
@ -1333,7 +1334,7 @@ minetest.register_abm({
function mcl_core.supports_vines(nodename)
local def = minetest.registered_nodes[nodename]
-- Rules: 1) walkable 2) full cube
return def.walkable and
return def and def.walkable and
(def.node_box == nil or def.node_box.type == "regular") and
(def.collision_box == nil or def.collision_box.type == "regular")
end