From: Howard Chu <hyc@openldap.org>
Date: Thu, 23 Apr 2015 04:49:56 +0000 (+0100)
Subject: ITS#8109 fix mdb_cursor_del0 on empty DB
X-Git-Tag: LMDB_0.9.15~16
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=b7511480c50e3a6099e223a8940fea501f5b6d2c;p=openldap

ITS#8109 fix mdb_cursor_del0 on empty DB
---

diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c
index cc87f19def..fe651509f8 100644
--- a/libraries/liblmdb/mdb.c
+++ b/libraries/liblmdb/mdb.c
@@ -7845,6 +7845,13 @@ mdb_cursor_del0(MDB_cursor *mc)
 		MDB_cursor *m2, *m3;
 		MDB_dbi dbi = mc->mc_dbi;
 
+		/* DB is totally empty now, just bail out.
+		 * Other cursors adjustments were already done
+		 * by mdb_rebalance and aren't needed here.
+		 */
+		if (!mc->mc_snum)
+			return rc;
+
 		mp = mc->mc_pg[mc->mc_top];
 		nkeys = NUMKEYS(mp);