TFS 1.X+ attempt to index a nil value

[Fortera Global]

why this error?
error:

Lua Script Error: [MoveEvents Interface]
data/movements/scripts/Meus/removerSummons.lua:onStepIn
data/movements/scripts/Meus/removerSummons.lua:11: attempt to index a nil value
stack traceback:
    [C]: in function '__index'
    data/movements/scripts/Meus/removerSummons.lua:11: in function <data/movements/scripts/Meus/removerSummons.lua:1>

code:

function onStepIn(creature, item, position, fromPosition)
   
    if not creature then
        return false
    end
   
    if not creature:isMonster() then
        return false
    end   
   
    if not creature:getMaster():isPlayer() then
        return false
    end

tfs 1.x+

 

[Infernum]

because getMaster() can return nil if the creature has no master, resulting in nil:getMaster() which is wrong
you need to check if master exists first before using it

    local master = creature:getMaster()
    if master and not master:isPlayer() then
        return false
    end