[10076] Fixed crash at remove from world pet under SPELL_AURA_MOD_POSSESS_PET

* Prevent crash at camera list update at attempt increment end() iterator.
* Properly do unapply SPELL_AURA_MOD_POSSESS_PET (GetPet() can return NULL at call, and not need checked)
* Propertly call unapply at delete auras cases for auras that set player-caster mover pointer.

src/game/Camera.h

@@ -80,8 +80,16 @@ class MANGOS_DLL_SPEC ViewPoint
     void CameraCall(void (Camera::*handler)())
     {
         if (!m_cameras.empty())
-            for(m_camera_iter = m_cameras.begin(); m_camera_iter!=m_cameras.end(); ++m_camera_iter)
+        {
+            for(m_camera_iter = m_cameras.begin(); m_camera_iter != m_cameras.end(); ++m_camera_iter)
+            {
                 ((*m_camera_iter)->*handler)();
+
+                // can be end() after handler
+                if (m_camera_iter == m_cameras.end())
+                    break;
+            }
+        }
     }
 
 public:

src/game/SpellAuras.cpp

@@ -3710,36 +3710,40 @@ void Aura::HandleModPossessPet(bool apply, bool Real)
     if(!caster || caster->GetTypeId() != TYPEID_PLAYER)
         return;
 
-    Pet *pet = caster->GetPet();
-    if(!pet || pet != GetTarget())
+    Unit* target = GetTarget();
+    if (target->GetTypeId() != TYPEID_UNIT)
         return;
+    Creature* pet = (Creature*)target;                      // not need more stricted type check
 
     Player* p_caster = (Player*)caster;
     Camera& camera = p_caster->GetCamera();
 
-    if(apply)
+    if (apply)
     {
-        pet->SetFlag(UNIT_FIELD_FLAGS, UNIT_FLAG_PLAYER_CONTROLLED);
         camera.SetView(pet);
-    }
-    else
-    {
-        pet->RemoveFlag(UNIT_FIELD_FLAGS, UNIT_FLAG_PLAYER_CONTROLLED);
-        camera.ResetView();
-    }
+        p_caster->SetCharm(pet);
+        p_caster->SetClientControl(pet, 1);
+        ((Player*)caster)->SetMover(pet);
 
-    p_caster->SetCharm(apply ? pet : NULL);
-    p_caster->SetClientControl(pet, apply ? 1 : 0);
-    ((Player*)caster)->SetMover(apply ? pet : NULL);
+        pet->SetFlag(UNIT_FIELD_FLAGS, UNIT_FLAG_PLAYER_CONTROLLED);
 
-    if(apply)
-    {
         pet->StopMoving();
-        pet->GetMotionMaster()->Clear();
+        pet->GetMotionMaster()->Clear(false);
         pet->GetMotionMaster()->MoveIdle();
     }
     else
     {
+        camera.ResetView();
+        p_caster->SetCharm(NULL);
+        p_caster->SetClientControl(pet, 0);
+        p_caster->SetMover(NULL);
+
+        // on delete only do caster related effects
+        if(m_removeMode == AURA_REMOVE_BY_DELETE)
+            return;
+
+        pet->RemoveFlag(UNIT_FIELD_FLAGS, UNIT_FLAG_PLAYER_CONTROLLED);
+
         pet->AttackStop();
         pet->GetMotionMaster()->MoveFollow(caster, PET_FOLLOW_DIST, PET_FOLLOW_ANGLE);
         pet->AddSplineFlag(SPLINEFLAG_WALKMODE);
@@ -8272,9 +8276,13 @@ void Aura::HandleAuraControlVehicle(bool apply, bool Real)
     if(!Real)
         return;
 
+    Unit* target = GetTarget();
+    if (target->GetTypeId() != TYPEID_UNIT || !((Creature*)target)->isVehicle())
+        return;
+    Vehicle* vehicle = (Vehicle*)target;
+
     Unit *player = GetCaster();
-    Vehicle *vehicle = dynamic_cast<Vehicle*>(GetTarget());
-    if(!player || player->GetTypeId() != TYPEID_PLAYER || !vehicle)
+    if(!player || player->GetTypeId() != TYPEID_PLAYER)
         return;
 
     if (apply)

src/game/Unit.cpp

@@ -4511,7 +4511,20 @@ void Unit::RemoveAura(AuraMap::iterator &i, AuraRemoveMode mode)
     DEBUG_FILTER_LOG(LOG_FILTER_SPELL_CAST, "Aura %u now is remove mode %d",Aur->GetModifier()->m_auraname, mode);
 
     // some auras also need to apply modifier (on caster) on remove
-    if (mode != AURA_REMOVE_BY_DELETE || Aur->GetModifier()->m_auraname == SPELL_AURA_MOD_POSSESS)
+    if (mode == AURA_REMOVE_BY_DELETE)
+    {
+        switch (Aur->GetModifier()->m_auraname)
+        {
+            // need properly undo any auras with player-caster mover set (or will crash at next caster move packet)
+            case SPELL_AURA_MOD_POSSESS:
+            case SPELL_AURA_MOD_POSSESS_PET:
+            case SPELL_AURA_CONTROL_VEHICLE:
+                Aur->ApplyModifier(false,true);
+                break;
+            default: break;
+        }
+    }
+    else
         Aur->ApplyModifier(false,true);
 
     if (Aur->_RemoveAura())

src/shared/revision_nr.h

@@ -1,4 +1,4 @@
 #ifndef __REVISION_NR_H__
 #define __REVISION_NR_H__
- #define REVISION_NR "10075"
+ #define REVISION_NR "10076"
 #endif // __REVISION_NR_H__