Don't check LEAF2 pages for subnodes

libraries/liblmdb/mdb.c

@@ -8139,7 +8139,9 @@ mdb_env_cwalk(mdb_copy *my, pgno_t pg)
 		unsigned n;
 		mp = mc.mc_pg[mc.mc_top];
 		n = NUMKEYS(mp);
+
 		if (IS_LEAF(mp)) {
+			if (!IS_LEAF2(mp)) {
 				for (i=0; i<n; i++) {
 					ni = NODEPTR(mp, i);
 					if (ni->mn_flags & F_BIGDATA) {
@@ -8176,6 +8178,7 @@ mdb_env_cwalk(mdb_copy *my, pgno_t pg)
 						toggle = my->mc_toggle;
 					}
 				}
+			}
 		} else {
 			mc.mc_ki[mc.mc_top]++;
 			if (mc.mc_ki[mc.mc_top] < n) {