Fix tainted downcast in RelationGetHypercoreInfo

Author: erimatnor

tsl/src/hypercore/hypercore_handler.c

@@ -320,13 +320,13 @@ lazy_build_hypercore_info_cache(Relation rel, bool create_chunk_constraints,
 HypercoreInfo *
 RelationGetHypercoreInfo(Relation rel)
 {
-	/*coverity[tainted_data_downcast : FALSE]*/
-	HypercoreInfo *info = rel->rd_amcache;
+	HypercoreInfo *info;
 
-	if (NULL == info)
-		info = rel->rd_amcache = lazy_build_hypercore_info_cache(rel, true, NULL);
+	if (NULL == rel->rd_amcache)
+		rel->rd_amcache = lazy_build_hypercore_info_cache(rel, true, NULL);
 
-	Assert(info && OidIsValid(info->compressed_relid));
+	Assert(rel->rd_amcache && OidIsValid(((HypercoreInfo *) rel->rd_amcache)->compressed_relid));
+	info = (HypercoreInfo *) rel->rd_amcache;
 
 	return info;
 }