diff --git a/server/gameserver/room.cc b/server/gameserver/room.cc
index d19becd2..06f1e1b9 100644
--- a/server/gameserver/room.cc
+++ b/server/gameserver/room.cc
@@ -3396,17 +3396,20 @@ void Room::GMFastForward()
              }
          });
     GetIncubator()->Clear(5);
-    for (auto& pair : human_hash_) {
-        if (pair.second->IsAndroid() &&
-            !a8::HasBitFlag(pair.second->status, CS_Disable)) {
-            Human* hum = pair.second;
-            hum->BeKill(VP_Gas,
-                        TEXT("battle_server_killer_gas", "毒圈"),
-                        VW_Gas,
-                        VP_Gas,
-                        TEXT("battle_server_killer_gas", "毒圈"));
-        }
-    }
+    TraverseHumanList
+        (
+         [] (Human* ele_hum) -> bool
+         {
+             if (ele_hum->IsAndroid() &&
+                 !a8::HasBitFlag(ele_hum->status, CS_Disable)) {
+                 Human* hum = ele_hum;
+                 hum->BeKill(VP_Gas,
+                             TEXT("battle_server_killer_gas", "毒圈"),
+                             VW_Gas,
+                             VP_Gas,
+                             TEXT("battle_server_killer_gas", "毒圈"));
+             }
+         });
     xtimer.SetTimeoutEx
         (
          1,