fix_assert.patch

diff --git a/src/backend/catalog/index.c b/src/backend/catalog/index.c
index b2b3ecb524..2e378ef4ef 100644
--- a/src/backend/catalog/index.c
+++ b/src/backend/catalog/index.c
@@ -2255,6 +2255,7 @@ index_drop(Oid indexId, bool concurrent, bool concurrent_lock_mode)
 		PopActiveSnapshot();
 		CommitTransactionCommand();
 		StartTransactionCommand();
+		PushActiveSnapshot(GetTransactionSnapshot());
 
 		/*
 		 * Now we must wait until no running transaction could be using the
@@ -2283,8 +2284,10 @@ index_drop(Oid indexId, bool concurrent, bool concurrent_lock_mode)
 		 * Again, commit the transaction to make the pg_index update visible
 		 * to other sessions.
 		 */
+		PopActiveSnapshot();
 		CommitTransactionCommand();
 		StartTransactionCommand();
+		PushActiveSnapshot(GetTransactionSnapshot());
 
 		/*
 		 * Wait till every transaction that saw the old index state has
@@ -2387,6 +2390,8 @@ index_drop(Oid indexId, bool concurrent, bool concurrent_lock_mode)
 	{
 		UnlockRelationIdForSession(&heaprelid, ShareUpdateExclusiveLock);
 		UnlockRelationIdForSession(&indexrelid, ShareUpdateExclusiveLock);
+
+		PopActiveSnapshot();
 	}
 }