Server crash because of [displayer] mod

[BetterToAutomateTheWorld]

2015-09-30 18:20:43: ACTION[ServerThread]: Aggomar places node colouredstonebricks:grey at (-764,15,-761)
2015-09-30 18:20:43: ACTION[ServerThread]: toto112 uses diplazer:com7, pointing at [node under=430,24,-38 above=430,24,-37]
2015-09-30 18:20:43: ERROR[main]: UNRECOVERABLE error occurred. Stopping server. Please fix the following error:
2015-09-30 18:20:43: ERROR[main]: Lua: Runtime error from mod '' in callback item_OnUse(): ...quentinbd/mff-creative/bin/../mods/diplazer/base.lua:1212: attempt to index local 'tp2node1' (a boolean value)
2015-09-30 18:20:43: ERROR[main]: stack traceback:
2015-09-30 18:20:43: ERROR[main]:   ...quentinbd/mff-creative/bin/../mods/diplazer/base.lua:1212: in function 'diplazer_use'
2015-09-30 18:20:43: ERROR[main]:   ...quentinbd/mff-creative/bin/../mods/diplazer/base.lua:1582: in function 'diplazer_onuse'
2015-09-30 18:20:43: ERROR[main]:   ...quentinbd/mff-creative/bin/../mods/diplazer/base.lua:1669: in function <...quentinbd/mff-creative/bin/../mods/diplazer/base.lua:1668>

In thread 7f918db13740:
/home/quentinbd/mff-creative/src/server.cpp:511: void Server::step(float): A fatal error occurred: Lua: Runtime error from mod '' in callback item_OnUse(): ...quentinbd/mff-creative/bin/../mods/diplazer/base.lua:1212: attempt to index local 'tp2node1' (a boolean value)
stack traceback:
    ...quentinbd/mff-creative/bin/../mods/diplazer/base.lua:1212: in function 'diplazer_use'
    ...quentinbd/mff-creative/bin/../mods/diplazer/base.lua:1582: in function 'diplazer_onuse'
    ...quentinbd/mff-creative/bin/../mods/diplazer/base.lua:1669: in function <...quentinbd/mff-creative/bin/../mods/diplazer/base.lua:1668>
Debug stacks:
DEBUG STACK FOR THREAD 7f9185220700:
#0  virtual void* EmergeThread::Thread()
(Leftover data: #1  MapBlock* ServerMap::loadBlock(v3s16))
(Leftover data: #2  void ServerMap::loadBlock(std::string*, v3s16, MapSector*, bool))
(Leftover data: #3  void ItemStack::deSerialize(std::istream&, IItemDefManager*))
DEBUG STACK FOR THREAD 7f9185c37700:
#0  virtual void* CurlFetchThread::Thread()
DEBUG STACK FOR THREAD 7f918780b700:
#0  virtual void* ServerThread::Thread()
#1  void Server::Receive()
(Leftover data: #2  void Server::SendBlocks(float))
(Leftover data: #3  void Server::SendBlockNoLock(irr::u16, MapBlock*, irr::u8, irr::u16))
(Leftover data: #4  void ItemStack::serialize(std::ostream&) const)
(Leftover data: #5  bool getCraftingResult(Inventory*, ItemStack&, std::vector<ItemStack>&, bool, IGameDef*))
(Leftover data: #6  void ItemStack::deSerialize(std::istream&, IItemDefManager*))
DEBUG STACK FOR THREAD 7f918db13740:
#0  int main(int, char**)
#1  Dedicated server branch
#2  void dedicated_server_loop(Server&, bool&)
#3  void Server::step(float)
/home/quentinbd/script/start-mff-creative.sh : ligne 26 :  9201 Abandon                 /home/quentinbd/mff-creative/bin/minetestserver --world /home/quentinbd/mff-creative/worlds/minetestforfun-creative/ --config /home/quentinbd/mff-creative/minetest.conf --gameid minetestforfun_creative --port 30088
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Server restarted at mercredi 30 septembre 2015, 18:21:13 (UTC+0200)
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