Core/Auras: Call Aura::HandleAuraSpecificMods in Aura::SetStackAmount to preserve compatibility with older scripts.

src/server/game/Entities/Unit/Unit.cpp

@@ -3276,7 +3276,7 @@ void Unit::_ApplyAura(AuraApplication * aurApp, uint8 effMask)
     if (aurApp->GetRemoveMode())
         return;
 
-    aura->HandleAuraSpecificMods(aurApp, caster, true);
+    aura->HandleAuraSpecificMods(aurApp, caster, true, false);
 
     // apply effects of the aura
     for (uint8 i = 0 ; i < MAX_SPELL_EFFECTS; ++i)
@@ -3358,7 +3358,7 @@ void Unit::_UnapplyAura(AuraApplicationMap::iterator &i, AuraRemoveMode removeMo
     if (!auraStateFound)
         ModifyAuraState(auraState, false);
 
-    aura->HandleAuraSpecificMods(aurApp, caster, false);
+    aura->HandleAuraSpecificMods(aurApp, caster, false, false);
 
     // only way correctly remove all auras from list
     //if (removedAuras != m_removedAurasCount) new aura may be added

src/server/game/Spells/Auras/SpellAuraEffects.cpp

@@ -403,7 +403,6 @@ void AuraEffect::GetTargetList(std::list<Unit *> & targetList) const
 void AuraEffect::GetApplicationList(std::list<AuraApplication*> & applicationList) const
 {
     Aura::ApplicationMap const & targetMap = GetBase()->GetApplicationMap();
-    // remove all targets which were not added to new list - they no longer deserve area aura
     for (Aura::ApplicationMap::const_iterator appIter = targetMap.begin(); appIter != targetMap.end(); ++appIter)
     {
         if (appIter->second->HasEffect(GetEffIndex()))

src/server/game/Spells/Auras/SpellAuras.cpp

@@ -780,9 +780,22 @@ void Aura::SetStackAmount(uint8 stackAmount)
 {
     m_stackAmount = stackAmount;
     Unit * caster = GetCaster();
+    
+    std::list<AuraApplication*> applications;
+    GetApplicationList(applications);
+
+    for (std::list<AuraApplication*>::const_iterator apptItr = applications.begin(); apptItr != applications.end(); ++apptItr)
+        if (!(*apptItr)->GetRemoveMode())
+            HandleAuraSpecificMods(*apptItr, caster, false, true);
+
     for (uint8 i = 0; i < MAX_SPELL_EFFECTS; ++i)
         if (HasEffect(i))
             m_effects[i]->ChangeAmount(m_effects[i]->CalculateAmount(caster), false, true);
+
+    for (std::list<AuraApplication*>::const_iterator apptItr = applications.begin(); apptItr != applications.end(); ++apptItr)
+        if (!(*apptItr)->GetRemoveMode())
+            HandleAuraSpecificMods(*apptItr, caster, true, true);
+
     SetNeedClientUpdateForTargets();
 }
 
@@ -919,6 +932,15 @@ void Aura::HandleAllEffects(AuraApplication * aurApp, uint8 mode, bool apply)
             m_effects[i]->HandleEffect(aurApp, mode, apply);
 }
 
+void Aura::GetApplicationList(std::list<AuraApplication*> & applicationList) const
+{
+    for (Aura::ApplicationMap::const_iterator appIter = m_applications.begin(); appIter != m_applications.end(); ++appIter)
+    {
+        if (appIter->second->GetEffectMask())
+            applicationList.push_back(appIter->second);
+    }
+}
+
 void Aura::SetNeedClientUpdateForTargets() const
 {
     for (ApplicationMap::const_iterator appIter = m_applications.begin(); appIter != m_applications.end(); ++appIter)
@@ -926,7 +948,7 @@ void Aura::SetNeedClientUpdateForTargets() const
 }
 
 // trigger effects on real aura apply/remove
-void Aura::HandleAuraSpecificMods(AuraApplication const * aurApp, Unit * caster, bool apply)
+void Aura::HandleAuraSpecificMods(AuraApplication const * aurApp, Unit * caster, bool apply, bool onReapply)
 {
     Unit * target = aurApp->GetTarget();
     AuraRemoveMode removeMode = aurApp->GetRemoveMode();
@@ -1172,7 +1194,7 @@ void Aura::HandleAuraSpecificMods(AuraApplication const * aurApp, Unit * caster,
     else
     {
         // Remove Linked Auras
-        if (removeMode != AURA_REMOVE_BY_DEATH)
+        if (!onReapply && removeMode != AURA_REMOVE_BY_DEATH)
         {
             if (uint32 customAttr = sSpellMgr->GetSpellCustomAttr(GetId()))
             {
@@ -1312,6 +1334,10 @@ void Aura::HandleAuraSpecificMods(AuraApplication const * aurApp, Unit * caster,
                 switch(GetId())
                 {
                    case 48018: // Demonic Circle
+                        // Do not remove GO when aura is removed by stack
+                        // to prevent remove GO added by new spell
+                        // old one is already removed
+                        if (!onReapply)
                             target->RemoveGameObject(GetId(), true);
                         target->RemoveAura(62388);
                     break;

src/server/game/Spells/Auras/SpellAuras.h

@@ -167,12 +167,13 @@ class Aura
 
         // Helpers for targets
         ApplicationMap const & GetApplicationMap() {return m_applications;}
+        void GetApplicationList(std::list<AuraApplication*> & applicationList) const;
         const AuraApplication * GetApplicationOfTarget (uint64 const & guid) const { ApplicationMap::const_iterator itr = m_applications.find(guid); if (itr != m_applications.end()) return itr->second; return NULL; }
         AuraApplication * GetApplicationOfTarget (uint64 const & guid) { ApplicationMap::iterator itr = m_applications.find(guid); if (itr != m_applications.end()) return itr->second; return NULL; }
         bool IsAppliedOnTarget(uint64 const & guid) const { return m_applications.find(guid) != m_applications.end(); }
 
         void SetNeedClientUpdateForTargets() const;
-        void HandleAuraSpecificMods(AuraApplication const * aurApp, Unit * caster, bool apply);
+        void HandleAuraSpecificMods(AuraApplication const * aurApp, Unit * caster, bool apply, bool onReapply);
         bool CanBeAppliedOn(Unit *target);
         bool CheckAreaTarget(Unit *target);