From 4a1717708cf1127c3d5d9f4101af69d67d8296d7 Mon Sep 17 00:00:00 2001
From: Howard Chu <hyc@symas.com>
Date: Wed, 6 Nov 2013 16:49:25 -0800
Subject: [PATCH] Fix cursor_del0 cursor fixup

Skip cursors that aren't as deep as current cursor
---
 libraries/liblmdb/mdb.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c
index 8aee859..44ce73e 100644
--- a/libraries/liblmdb/mdb.c
+++ b/libraries/liblmdb/mdb.c
@@ -7295,6 +7295,8 @@ mdb_cursor_del0(MDB_cursor *mc, MDB_node *leaf)
 				continue;
 			if (!(m2->mc_flags & C_INITIALIZED))
 				continue;
+			if (m2->mc_top < mc->mc_top)
+				continue;
 			if (m2->mc_pg[mc->mc_top] == mp) {
 				if (m2->mc_ki[mc->mc_top] >= ki) {
 					m2->mc_flags |= C_DEL;