From a949c9f2b090435ca63de525ee2cd1a79073f08a Mon Sep 17 00:00:00 2001
From: George Hazan <ghazan@miranda.im>
Date: Sun, 25 Oct 2020 13:00:15 +0300
Subject: fixes #2569 (Miranda uses libmdbx unsafely)

---
 libs/libmdbx/src/mdbx.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'libs/libmdbx')

diff --git a/libs/libmdbx/src/mdbx.c b/libs/libmdbx/src/mdbx.c
index 2fa4734952..bb565a72b7 100644
--- a/libs/libmdbx/src/mdbx.c
+++ b/libs/libmdbx/src/mdbx.c
@@ -8872,6 +8872,9 @@ static void mdbx_cursors_eot(MDBX_txn *txn, unsigned merge) {
   MDBX_xcursor *mx;
   int i;
 
+  if (cursors == nullptr)
+     return;
+
   for (i = txn->mt_numdbs; --i >= 0;) {
     for (mc = cursors[i]; mc; mc = next) {
       unsigned stage = mc->mc_signature;
-- 
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