Core/Threat: Properly sequence checking offline state _after_ adding the reference to the threat list. This ensures IsEngagedWith reports consistent values for downstack calls in Creature. Closes #22406.

(cherry picked from commit 9f1755dbf13d475a26741690ec5d6a340a7f4230)

2 files changed, 10 insertions, 4 deletions

diff --git a/src/server/game/Combat/ThreatManager.cpp b/src/server/game/Combat/ThreatManager.cpp
index 2f2351bb43f..d6d6378373e 100644
--- a/src/server/game/Combat/ThreatManager.cpp
+++ b/src/server/game/Combat/ThreatManager.cpp
@@ -397,9 +397,15 @@ void ThreatManager::AddThreat(Unit* target, float amount, SpellInfo const* spell
     }
 
     // ok, we're now in combat - create the threat list reference and push it to the respective managers
-    ThreatReference* ref = new ThreatReference(this, target, amount);
+    ThreatReference* ref = new ThreatReference(this, target);
     PutThreatListRef(target->GetGUID(), ref);
     target->GetThreatManager().PutThreatenedByMeRef(_owner->GetGUID(), ref);
+
+    // afterwards, we evaluate whether this is an online reference (it might not be an acceptable target, but we need to add it to our threat list before we check!)
+    ref->UpdateOffline();
+    if (ref->IsOnline()) // ...and if the ref is online it also gets the threat it should have
+        ref->AddThreat(amount);
+
     if (!_ownerEngaged)
     {
         Creature* cOwner = ASSERT_NOTNULL(_owner->ToCreature()); // if we got here the owner can have a threat list, and must be a creature!
diff --git a/src/server/game/Combat/ThreatManager.h b/src/server/game/Combat/ThreatManager.h
index eca5f45c804..decd9d0a26b 100644
--- a/src/server/game/Combat/ThreatManager.h
+++ b/src/server/game/Combat/ThreatManager.h
@@ -278,10 +278,10 @@ class TC_GAME_API ThreatReference
     private:
         static bool FlagsAllowFighting(Unit const* a, Unit const* b);
 
-        ThreatReference(ThreatManager* mgr, Unit* victim, float amount) :
+        ThreatReference(ThreatManager* mgr, Unit* victim) :
             _owner(reinterpret_cast<Creature*>(mgr->_owner)), _mgr(*mgr), _victim(victim),
-            _online(ShouldBeOffline() ? ONLINE_STATE_OFFLINE : ShouldBeSuppressed() ? ONLINE_STATE_SUPPRESSED : ONLINE_STATE_ONLINE),
-            _baseAmount(IsOnline() ? amount : 0.0f), _tempModifier(0), _taunted(TAUNT_STATE_NONE) { }
+            _online(ShouldBeSuppressed() ? ONLINE_STATE_SUPPRESSED : ONLINE_STATE_ONLINE),
+            _baseAmount(0.0f), _tempModifier(0), _taunted(TAUNT_STATE_NONE) { }
 
         void UnregisterAndFree();