Crash GameEventMgr::RunSmartAIScripts

Description

Crash: https://gist.github.com/Idoitbetter/5bfa39aae76442291831de20132f47c0

It is an old crash, it is not frequent, it occurs very rarely, there are old issues closed with the same crash.
https://github.com/TrinityCore/TrinityCore/issues/17587#issuecomment-234774828

in crashlog and crashlog of the issue appear event_id=33 (Dalaran: Minigob)

I will try to add a log to avoid the crash and log some info, but I'm not sure when it will happen again, as I've seen it 2 times in years

diff --git a/src/server/game/Events/GameEventMgr.cpp b/src/server/game/Events/GameEventMgr.cpp
index ffe2ef39e7a..7a599462683 100644
--- a/src/server/game/Events/GameEventMgr.cpp
+++ b/src/server/game/Events/GameEventMgr.cpp
@@ class GameEventAIHookWorker
     void Visit(std::unordered_map<ObjectGuid, Creature*>& creatureMap)
     {
         for (auto const& p : creatureMap)
             if (p.second->IsInWorld() && p.second->IsAIEnabled())
                 p.second->AI()->OnGameEvent(_activate, _eventId);
     }
 
     void Visit(std::unordered_map<ObjectGuid, GameObject*>& gameObjectMap)
     {
         for (auto const& p : gameObjectMap)
+        {
             if (p.second->IsInWorld())
-                p.second->AI()->OnGameEvent(_activate, _eventId);
+            {
+                if (p.second->AI())
+                    p.second->AI()->OnGameEvent(_activate, _eventId);
+                else
+                    TC_LOG_ERROR("test.gameevent", "GameEventMgr::RunSmartAIScripts AI() Null: gameObjectMap debug info: %s", p.second->GetDebugInfo().c_str());
+            }
+        }
     }
 
     template<class T>

Expected behaviour

No crash

Steps to reproduce the problem

I don't know

Branch

3.3.5

TC rev. hash/commit

f418631de0c193772e24f379db5aafcc01f3fb6a

Operating system

Debian 10

Custom changes

None

Start with the crash gist and src/server/game/Events/GameEventMgr.cpp, especially GameEventAIHookWorker and the GameObject handling shown in the report. Investigate the rare event_id=33 path on the 3.3.5 branch; done means the null-AI crash cause is confirmed and a fix is validated, though the issue provides no reproduction steps or test to run.