WowAce

Game Version: MoP Classic 5.5.4 (Siege of Orgrimmar update)

Bartender4 Version: 4.7.5

Description

After /reload, entering combat may trigger an ADDON_ACTION_BLOCKED error attributed to Bartender4.

The issue appears to be related to pet autocast functionality. I have only been able to reproduce it on characters with pets (e.g. Warlock/Hunter), and the error does not occur when all pet autocasts are disabled.

The error typically occurs only once after /reload, usually on the first combat engagement.

Reproduction Steps

1. Log in on a character with a pet.
2. Enable an autocast ability (e.g. Firebolt, Growl, etc.).
3. Summon the pet.
4. Execute /reload.
5. Enter combat.

Result

An ADDON_ACTION_BLOCKED error is generated, for example:

Bartender4 tried to call the protected function 'MultiBarLeftButton5:SetAttribute()'

Other variants observed:

MultiBarRightButton4:SetAttribute()
MultiBarBottomRightButton11:SetAttribute()
MultiBarBottomRightButton12:SetAttribute()

Additional Findings

The issue does not reproduce when pet autocasts are disabled.

Relevant taint.log excerpts:

An action was blocked in combat because of taint from Bartender4 - MultiBar5Button4:SetAttribute()

MultiBar5Button4:SetAttribute()
Interface/AddOns/Blizzard_ActionBar/Shared/ActionButton.lua:521 MultiBar5Button4:UpdatePressAndHoldAction()
Interface/AddOns/Blizzard_ActionBar/Shared/ActionButton.lua:593 MultiBar5Button4:Update()
Interface/AddOns/Blizzard_ActionBar/Shared/ActionButton.lua:1062 MultiBar5Button4:OnEvent()

and:

Execution tainted by Bartender4 while reading field 5
Interface/AddOns/Blizzard_SharedXMLBase/TableUtil.lua:64 tDeleteItem()

Interface/AddOns/Blizzard_UIPanelTemplates/Classic/AutoCastTemplates.lua:43 AutoCastOverlayManager:RemoveActiveShine()
Interface/AddOns/Blizzard_UIPanelTemplates/Classic/AutoCastTemplates.lua:21 Frame:ShowAutoCastEnabled()
Interface/AddOns/Blizzard_ActionBar/Shared/ActionButton.lua:1324 MultiBarBottomRightButton12:UpdateFlash()

Notes

• The problem appears to be connected to pet autocast handling and/or AutoCastOverlayManager.
• The issue started after the MoP Classic 5.5.4 update.
• Bartender4 pet buttons are being used (BT4PetButtonX).
• I have not yet noticed any functional breakage; action bars and pet abilities continue to work normally. The issue currently appears to be limited to taint warnings.