From 041db03c944b0527190fe40655b47f0c7cfdf844 Mon Sep 17 00:00:00 2001
From: zhannngchen <48427519+zhannngchen@users.noreply.github.com>
Date: Wed, 7 Feb 2024 22:28:30 +0800
Subject: [PATCH] [fix](gc) fix a core introduced by #30854 (#30932)

introduced by #30854, if it is the end of the map _unused_rowsets, program will core.
---
 be/src/olap/storage_engine.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/be/src/olap/storage_engine.cpp b/be/src/olap/storage_engine.cpp
index f1ba693a50..26c58b0483 100644
--- a/be/src/olap/storage_engine.cpp
+++ b/be/src/olap/storage_engine.cpp
@@ -1095,7 +1095,6 @@ void StorageEngine::start_delete_unused_rowset() {
                 }
                 it = _unused_rowsets.erase(it);
             } else {
-                ++it;
                 if (rs.use_count() != 1) {
                     ++due_to_use_count;
                 } else if (!rs->need_delete_file()) {
@@ -1103,6 +1102,7 @@ void StorageEngine::start_delete_unused_rowset() {
                 } else {
                     ++due_to_delayed_expired_ts;
                 }
+                ++it;
             }
         }
     }