Unclear Error Message when developing mod

[LMD]

Code: Select all

2018-06-22 15:35:43: ACTION[Server]: singleplayer uses potions:regen_potion_lev_1_tier_1, pointing at [nothing]
2018-06-22 15:35:43: ERROR[Server]: In thread 7fbbdfffe700:
2018-06-22 15:35:43: ERROR[Server]: /build/minetest-5Mbp7_/minetest-0.4.17/src/script/common/c_internal.cpp:b8: void log_deprecated(lua_State*, const string&): A fatal error occured: lua_getstack() failed
2018-06-22 15:35:43: ERROR[Server]: Debug stacks:
2018-06-22 15:35:43: ERROR[Server]: DEBUG STACK FOR THREAD 7fbbc67fc700: 
2018-06-22 15:35:43: ERROR[Server]: #0  virtual void* EmergeThread::run()
2018-06-22 15:35:43: ERROR[Server]: DEBUG STACK FOR THREAD 7fbbc6ffd700: 
2018-06-22 15:35:43: ERROR[Server]: #0  virtual void* UpdateThread::run()
2018-06-22 15:35:43: ERROR[Server]: DEBUG STACK FOR THREAD 7fbbc77fe700: 
2018-06-22 15:35:43: ERROR[Server]: #0  virtual void* UpdateThread::run()
2018-06-22 15:35:43: ERROR[Server]: DEBUG STACK FOR THREAD 7fbbdfffe700: 
2018-06-22 15:35:43: ERROR[Server]: #0  virtual void* ServerThread::run()
2018-06-22 15:35:43: ERROR[Server]: #1  void Server::Receive()
2018-06-22 15:35:43: ERROR[Server]: #2  void Server::ProcessData(NetworkPacket*)
2018-06-22 15:35:43: ERROR[Server]: DEBUG STACK FOR THREAD 7fbbfcca1780: 
2018-06-22 15:35:43: ERROR[Server]: #0  int main(int, char**)

A fatal error occured: lua_getstack() failed
I guess its due to that :

Code: Select all

stack:take_item()
 return stack

in on use
Can anybody tell me why ? Thanks.

EDIT : Reinstalling MT fixed the problem. However, I am still curious WHY.