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Do not trust node.param2.
The table lookup will fail if node.param2 is outside [0-3] which is easily possible since there are several ways to modify param2 values of nodes. Force truncating param2 to always be 0-3 before using it in a table lookup.
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@ -71,7 +71,7 @@ pipeworks.spigot_check = function(pos, node)
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local belowname = minetest.get_node({x=pos.x,y=pos.y-1,z=pos.z}).name
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local belowname = minetest.get_node({x=pos.x,y=pos.y-1,z=pos.z}).name
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if belowname and (belowname == "air" or belowname == "default:water_flowing" or belowname == "default:water_source") then
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if belowname and (belowname == "air" or belowname == "default:water_flowing" or belowname == "default:water_source") then
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local spigotname = minetest.get_node(pos).name
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local spigotname = minetest.get_node(pos).name
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local fdir=node.param2
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local fdir=node.param2 % 4
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local check = {
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local check = {
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{x=pos.x,y=pos.y,z=pos.z+1},
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{x=pos.x,y=pos.y,z=pos.z+1},
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{x=pos.x+1,y=pos.y,z=pos.z},
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{x=pos.x+1,y=pos.y,z=pos.z},
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