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catch a similar nil condition in the node breaker
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@ -102,6 +102,8 @@ end
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function break_node (pos, facedir)
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--locate the outgoing velocity, front, and back of the node via facedir_to_dir
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if type(facedir) ~= "number" or facedir < 0 or facedir > 23 then return end
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local vel = minetest.facedir_to_dir(facedir);
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local front = {x=pos.x - vel.x, y=pos.y - vel.y, z=pos.z - vel.z}
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local back = {x=pos.x + vel.x, y=pos.y + vel.y, z=pos.z + vel.z}
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