Bug: mod bones - server crash when use 'minetest.punch_node()' from any mod

[berengma]

Version:

Minetest 5.8.0 (Linux)
Using LuaJIT 2.1.0-beta3
BUILD_TYPE=Release
RUN_IN_PLACE=0
USE_CURL=1
STATIC_SHAREDIR="/usr/local/share/minetest"

Error message from log:

2024-07-27 01:58:25: ERROR[Main]: ServerError: AsyncErr: Lua: Runtime error from mod 'bones' in callback luaentity_Step(): "Runtime error from mod 'bones' in callback node_on_punch(): ...l/share/minetest/games/minetest_game/mods/bones/init.lua:100: attempt to index local 'player_inv' (a ni
2024-07-27 01:58:25: ERROR[Main]: l value)
2024-07-27 01:58:25: ERROR[Main]: stack traceback:
2024-07-27 01:58:25: ERROR[Main]:       ...l/share/minetest/games/minetest_game/mods/bones/init.lua:100: in function <...l/share/minetest/games/minetest_game/mods/bones/init.lua:85>
2024-07-27 01:58:25: ERROR[Main]:       [C]: in function 'punch_node'

reproduction:

• just minetest game and a a mod using the 'minetest.punch_node(pos)' method
• player with something in inv dies
• use a mod with the described method and use it on the pos of the placed bones
• server crashes with above message

possible solution:

• In init.lua line 85 not only check for owner but maybe check also for player:sPlayer() ?

[SmallJoker]

Reproduced by spawning new bones (do not place manually).

minetest.register_chatcommand("p", {
    func = function(name, param)
        local pos = minetest.get_player_by_name(name):get_pos()

        local node_name = #param > 0 and param or "bones:bones"
        local np = minetest.find_node_near(pos, 4, node_name, true)
        if not np then
            return false, "No node found"
        end
        minetest.punch_node(np)
        return true, "OK!"
    end
})

Even though the Lua API states that puncher may be nil, but the C++ side creates an empty ObjectRef, which in turn does not have an inventory.

What is the expected result? Would you like to remove the node and destroy all of its contents, drop the contents as item entities, or disallow any interaction?

[berengma]

Difficult to say what the expected result is. Depends on the mod which uses the method. Disallowing any interaction is probably not what I wanted to have, when I wrote a bone harvester mod. Removing the node and destroy everything is something the involving mod could handle by itself. I think dropping the contents and removing the bones node would be the best option. Thinking in terms of what other mods could do with the results.

[berengma]

see PR #3146