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-rw-r--r--src/backend/access/hash/hashutil.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/backend/access/hash/hashutil.c b/src/backend/access/hash/hashutil.c
index fe37bc47cbb..32822dbb6b9 100644
--- a/src/backend/access/hash/hashutil.c
+++ b/src/backend/access/hash/hashutil.c
@@ -436,7 +436,7 @@ _hash_get_oldblock_from_newbucket(Relation rel, Bucket new_bucket)
* started. Masking the most significant bit of new bucket would give us
* old bucket.
*/
- mask = (((uint32) 1) << (fls(new_bucket) - 1)) - 1;
+ mask = (((uint32) 1) << pg_leftmost_one_pos32(new_bucket)) - 1;
old_bucket = new_bucket & mask;
metabuf = _hash_getbuf(rel, HASH_METAPAGE, HASH_READ, LH_META_PAGE);