Fix end range intersection check (followup to #20574) (#20795)

vitalif · web-flow · commit 580f81054f03 · 2025-07-08T14:07:22.000Z
diff --git a/ydb/core/tx/schemeshard/schemeshard_info_types.cpp b/ydb/core/tx/schemeshard/schemeshard_info_types.cpp
@@ -2443,7 +2443,7 @@ void TIndexBuildInfo::AddParent(const TSerializedTableRange& range, TShardIdx sh
         parentFrom++;
     }
 
-    if (parentTo == itFrom->second.From) {
+    if (itFrom != Cluster2Shards.end() && parentTo == itFrom->second.From) {
         // Intersects by parentTo
         if (itFrom->second.From < itFrom->first) {
             auto endShards = itFrom->second.Shards;

Original file line number	Diff line number	Diff line change
`@@ -2443,7 +2443,7 @@ void TIndexBuildInfo::AddParent(const TSerializedTableRange& range, TShardIdx sh`
`2443`	`2443`	`parentFrom++;`
`2444`	`2444`	`}`
`2445`	`2445`
`2446`		`- if (parentTo == itFrom->second.From) {`
	`2446`	`+ if (itFrom != Cluster2Shards.end() && parentTo == itFrom->second.From) {`
`2447`	`2447`	`// Intersects by parentTo`
`2448`	`2448`	`if (itFrom->second.From < itFrom->first) {`
`2449`	`2449`	`auto endShards = itFrom->second.Shards;`