Non-Recoverable Error on Game Load

[Merkantore]

Problem Description

Error AppManagerStates.cpp:1648: The mod Factory Planner (2.0.16) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event factoryplanner::on_configuration_changed
__factoryplanner__/backend/handlers/prototyper.lua:131: attempt to index local 'relevant_map' (a nil value)
stack traceback:
	__factoryplanner__/backend/handlers/prototyper.lua:131: in function 'find'
	__factoryplanner__/backend/handlers/prototyper.lua:203: in function 'validate_prototype_object'
	__factoryplanner__/backend/data/Machine.lua:237: in function 'validate'
	__factoryplanner__/backend/data/Line.lua:323: in function 'validate'
	__factoryplanner__/backend/data/Object.lua:291: in function '_validate'
	__factoryplanner__/backend/data/Floor.lua:238: in function 'validate'
	__factoryplanner__/backend/data/Factory.lua:238: in function 'validate'
	__factoryplanner__/backend/data/Object.lua:291: in function '_validate'
	__factoryplanner__/backend/data/District.lua:121: in function 'validate'
	__factoryplanner__/backend/data/Object.lua:291: in function '_validate'
	__factoryplanner__/backend/data/Realm.lua:80: in function 'validate'
	__factoryplanner__/backend/init.lua:193: in function 'refresh_player_table'
	__factoryplanner__/backend/init.lua:248: in function <__factoryplanner__/backend/init.lua:229>

Reproduction

Crash is caused when prototyper.util.find(data_type, prototype, category) is called with
data_type = nil
prototype = offshore-pump
category = nil

So I "fixed" it by adding at the beginning of the find-function:

  if prototype == "offshore-pump" and category == nil and data_type == nil then
    return nil
  end