How to deal with taint issues?

[maqjav]

Hello!

I've been the whole morning trying to understand the taint logs and why I'm getting this error in my addon and it doens't make too much sence to me. This is the first time I have to deal with something like this, so I'm a little bit lost.

Here is the log:

5/24 14:59:11.579  Global variable INTERFACE_ACTION_BLOCKED_SHOWN tainted by RareScanner - Interface\FrameXML\UIParent.lua:5448 DisplayInterfaceActionBlockedMessage()
5/24 14:59:11.579      Interface\FrameXML\UIParent.lua:3282 CheckProtectedFunctionsAllowed()
5/24 14:59:11.579      Interface\FrameXML\UIParent.lua:3294 ShowUIPanel()
5/24 14:59:11.579      Interface\AddOns\Blizzard_EncounterJournal\Blizzard_EncounterJournal.lua:2378 EncounterJournal_OpenJournal()
5/24 14:59:11.579      Interface\AddOns\Blizzard_SharedMapDataProviders\DungeonEntranceDataProvider.lua:33 <unnamed>:OnClick()
5/24 14:59:11.579      Interface\AddOns\Blizzard_MapCanvas\Blizzard_MapCanvas.lua:124
5/24 14:59:11.579  Execution tainted by RareScanner while reading EncounterJournalBossButton1 - Interface\AddOns\Blizzard_EncounterJournal\Blizzard_EncounterJournal.lua:1720 EncounterJournal_ClearDetails()
5/24 14:59:11.579      Interface\AddOns\Blizzard_EncounterJournal\Blizzard_EncounterJournal.lua:692 EncounterJournal_DisplayInstance()
5/24 14:59:11.579      Interface\AddOns\Blizzard_EncounterJournal\Blizzard_EncounterJournal.lua:2381 EncounterJournal_OpenJournal()
5/24 14:59:11.579      Interface\AddOns\Blizzard_SharedMapDataProviders\DungeonEntranceDataProvider.lua:33 <unnamed>:OnClick()
5/24 14:59:11.579      Interface\AddOns\Blizzard_MapCanvas\Blizzard_MapCanvas.lua:124

And according to that stacktrace, the line affected is:

Interface\AddOns\Blizzard_EncounterJournal\Blizzard_EncounterJournal.lua:1720 EncounterJournal_ClearDetails():

1719: local bossIndex = 1
1720: local bossButton = _G["EncounterJournalBossButton"..bossIndex];

The error occurs while I'm in combat and I try to click on a "raid" or "dungeon" icon on the worldmap.

My addon doesn't use anything from the EncounterJournal, so I imagine this error comes from somewhere else.

Ideas? I'm not asking for the solution, I'm asking for a guide of how can I find the relation between that error and my bug.

Thanks.