hmap: Fix bug in hmap_replace().

When hmap_replace() replaces one hash table node by another, it must
ensure that any nodes following the old node also follow the new node,
by copying the "next" pointer from "old" to "new".

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/hmap.h b/lib/hmap.h
index 1809a91b5..980880591 100644
--- a/lib/hmap.h
+++ b/lib/hmap.h
@@ -190,6 +190,7 @@ hmap_replace(struct hmap *hmap,
     }
     *bucket = new;
     new->hash = old->hash;
+    new->next = old->next;
 }
 
 static inline struct hmap_node *