ITS#8336 fix page_search_root assert on FreeDB

Let "illegal" branch pages thru on the FreeDB - the condition
is only temporary and will be fixed by the time rebalance finishes.

diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c
index 0c93c371b450ac41833e86cbc0f0e7c9b85de1fb..c603654bcd9777cb5efa469ee9b9cebb9d44aaf0 100644 (file)
--- a/libraries/liblmdb/mdb.c
+++ b/libraries/liblmdb/mdb.c
@@ -5434,7 +5434,11 @@ mdb_page_search_root(MDB_cursor *mc, MDB_val *key, int flags)
                indx_t          i;
 
                DPRINTF(("branch page %"Z"u has %u keys", mp->mp_pgno, NUMKEYS(mp)));
-               mdb_cassert(mc, NUMKEYS(mp) > 1);
+               /* Don't assert on branch pages in the FreeDB. We can get here
+                * while in the process of rebalancing a FreeDB branch page; we must
+                * let that proceed. ITS#8336
+                */
+               mdb_cassert(mc, !mc->mc_dbi || NUMKEYS(mp) > 1);
                DPRINTF(("found index 0 to page %"Z"u", NODEPGNO(NODEPTR(mp, 0))));
 
                if (flags & (MDB_PS_FIRST|MDB_PS_LAST)) {