Since upgrading two of my three servers to v5, my servers crash randomly during the day with this error:
2019-03-13 02:24:53: ERROR[Main]: ServerError: AsyncErr: Lua: finishGenRuntime error from mod 'default' in callback environment_OnGenerated(): .../bin/../games/minetest_game/mods/dungeon_loot/mapgen.lua:91: attempt to index local 'itemdef' (a nil value)
2019-03-13 02:24:53: ERROR[Main]: stack traceback:
2019-03-13 02:24:53: ERROR[Main]: .../bin/../games/minetest_game/mods/dungeon_loot/mapgen.lua:91: in function 'populate_chest'
2019-03-13 02:24:53: ERROR[Main]: .../bin/../games/minetest_game/mods/dungeon_loot/mapgen.lua:165: in function <.../bin/../games/minetest_game/mods/dungeon_loot/mapgen.lua:122>
2019-03-13 02:24:53: ERROR[Main]: (REMOVED)/bin/../builtin/game/register.lua:419: in function <(REMOVED)/bin/../builtin/game/register.lua:399>
