From 94f31b96b8d2c47ce6a893313c37e49768fbfff7 Mon Sep 17 00:00:00 2001
From: Vitaliy Filippov <vitalif@yourcmc.ru>
Date: Sun, 30 Nov 2025 01:49:49 +0300
Subject: [PATCH] Cancel block changes on write failures/CAS retries (should
 fix #115)

---
 src/kv/kv_db.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/kv/kv_db.cpp b/src/kv/kv_db.cpp
index 04384fb0..959a136e 100644
--- a/src/kv/kv_db.cpp
+++ b/src/kv/kv_db.cpp
@@ -1794,6 +1794,7 @@ void kv_op_t::update_block(int path_pos, bool is_delete, const std::string & key
         {
             if (res < 0)
             {
+                blk->cancel_change();
                 auto blk_offset = blk->offset;
                 del_block_level(db, blk);
                 db->block_cache.erase(blk_offset);
@@ -1926,6 +1927,7 @@ void kv_op_t::update_block(int path_pos, bool is_delete, const std::string & key
             {
                 if (write_res < 0)
                 {
+                    blk->cancel_change();
                     auto blk_offset = blk->offset;
                     del_block_level(db, blk);
                     db->block_cache.erase(blk_offset);