From bce32cc0e884a6176f2795ca736f74091a5c2a6b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=83=91=E4=BD=A9=E8=8C=B9?= <zhengpeiru21@protonmail.com>
Date: Wed, 23 Mar 2022 15:42:45 -0600
Subject: [PATCH] Prevent crash in RandomTeleport

---
 src/RandomPlayerbotMgr.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/RandomPlayerbotMgr.cpp b/src/RandomPlayerbotMgr.cpp
index 2a484f47..52b4dbc6 100644
--- a/src/RandomPlayerbotMgr.cpp
+++ b/src/RandomPlayerbotMgr.cpp
@@ -996,6 +996,13 @@ void RandomPlayerbotMgr::RandomTeleport(Player* bot, std::vector<WorldLocation>&
         return i == sPlayerbotAIConfig->randomBotMaps.end();
     }), tlocs.end());
 
+    // Check locs again in case all possible locations were removed
+    if (locs.empty())
+    {
+        LOG_DEBUG("playerbots", "Cannot teleport bot {} - all locations removed by filter", bot->GetName().c_str());
+        return;
+    }
+
     //Random shuffle based on distance. Closer distances are more likely (but not exclusivly) to be at the begin of the list.
     tlocs = sTravelMgr->getNextPoint(WorldPosition(bot), tlocs, 0);