Any idea on how to fix bad argument #2 to 'find_node_near'

[minetestcr]

Hello. I opened minetest today, after about a month of no activity, opened my world, and when I got near certain region, it crashed....
I have minetest 0.4.14-dev
Ubuntu 14.04
this is the debug:

Your phone or window isn't wide enough to display the code box. If it's a phone, try rotating it to landscape mode.

Code: Select all

2016-10-03 18:26:21: ACTION[Server]: singleplayer [127.0.0.1] joins game.
2016-10-03 18:26:21: ACTION[Server]: singleplayer joins game. List of players: singleplayer
2016-10-03 18:26:22: WARNING[Server]: Undeclared global variable "creative_inventory" accessed at ...jdigital/.minetest/mods/WorldEdit/worldedit_gui/init.lua:143
2016-10-03 18:26:29: WARNING[Server]: Undeclared global variable "spawn_plants" accessed at .../stjdigital/.minetest/mods/plantlife/plants_lib/init.lua:305
2016-10-03 18:26:37: ACTION[Server]: singleplayer sets time to 5555
2016-10-03 18:26:47: ERROR[Main]: ServerError: Lua: Runtime error from mod 'default' in callback LuaABM::trigger(): .../minetest/games/minetest_game/mods/default/functions.lua:320: bad argument #2 to 'find_node_near' (number expected, got nil)
2016-10-03 18:26:47: ERROR[Main]: stack traceback:
2016-10-03 18:26:47: ERROR[Main]:    [C]: in function 'find_node_near'
2016-10-03 18:26:47: ERROR[Main]:    .../minetest/games/minetest_game/mods/default/functions.lua:320: in function <.../minetest/games/minetest_game/mods/default/functions.lua:311>

thanks

[duane]

The code in question is:

Your phone or window isn't wide enough to display the code box. If it's a phone, try rotating it to landscape mode.

Code: Select all

      local rad = minetest.registered_nodes[node.name].groups.leafdecay
      -- Assume ignore is a trunk, to make this
      -- work at the border of a loaded area
      if minetest.find_node_near(pos, rad, {"ignore", "group:tree"}) then
         return
      end


It's part of the general leaf decay function. It should probably read more like this, to avoid assuming its arguments are going to be there:

Your phone or window isn't wide enough to display the code box. If it's a phone, try rotating it to landscape mode.

Code: Select all

      local rad = minetest.registered_nodes[node.name].groups.leafdecay

      if not (pos and rad) then
         return
      end

      -- Assume ignore is a trunk, to make this
      -- work at the border of a loaded area
      if minetest.find_node_near(pos, rad, {"ignore", "group:tree"}) then
         return
      end


Make that change to minetest_game/mods/default/functions.lua, and you shouldn't get any more crashes. However, there's still a node somewhere that doesn't have leafdecay set correctly. Finding that is probably more trouble than it's worth. If you see any odd leaves in your game, just remove them.

[minetestcr]

Thank you duane. My game doesn't have "minetest_game/mods/default/functions.lua", or at least, the "functions.lua" files that i found don't have the code you mention. Anyway, since you pointed me towards leafdecay, I deactivated moretrees mod and the game does not crash any more. Thanks.

The code in question is:

Your phone or window isn't wide enough to display the code box. If it's a phone, try rotating it to landscape mode.

Code: Select all

      local rad = minetest.registered_nodes[node.name].groups.leafdecay
      -- Assume ignore is a trunk, to make this
      -- work at the border of a loaded area
      if minetest.find_node_near(pos, rad, {"ignore", "group:tree"}) then
         return
      end