ITS#8316 cursor fixup in page_merge

Deleting the merged page requires bumping down other ki's
of the page's parent.

diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c
index 5cd4536efb0ea48e54dcf4da8e6a234d3d97aa14..819a6319109df39887c6cad9cdd6a7e91562edca 100644 (file)
--- a/libraries/liblmdb/mdb.c
+++ b/libraries/liblmdb/mdb.c
@@ -7842,6 +7842,9 @@ mdb_page_merge(MDB_cursor *csrc, MDB_cursor *cdst)
                                m3->mc_pg[top] = pdst;
                                m3->mc_ki[top] += nkeys;
                                m3->mc_ki[top-1] = cdst->mc_ki[top-1];
+                       } else if (m3->mc_pg[top-1] == csrc->mc_pg[top-1] &&
+                               m3->mc_ki[top-1] > csrc->mc_ki[top-1]) {
+                               m3->mc_ki[top-1]--;
                        }
                }
        }