From cea29fe485c05183f3f775f3dc4da9d7ddb87528 Mon Sep 17 00:00:00 2001
From: Leonid Yuriev <leo@yuriev.ru>
Date: Sat, 19 Dec 2020 20:16:45 +0300
Subject: [PATCH] mdbx: fix assertion inside `mdbx_page_retire()`.

Change-Id: I5d8f92b9fde1c961252757ea508403b5f51e7646
---
 src/core.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/core.c b/src/core.c
index 540c8ad0..f6e07982 100644
--- a/src/core.c
+++ b/src/core.c
@@ -4188,8 +4188,13 @@ static int mdbx_page_retire(MDBX_cursor *mc, MDBX_page *mp) {
     const unsigned i = mdbx_pnl_exist(txn->tw.spill_pages, pgno << 1);
     if (i) {
       /* This page is no longer spilled */
+#if MDBX_PNL_ASCENDING
       mdbx_tassert(txn, i == MDBX_PNL_SIZE(txn->tw.spill_pages) ||
                             txn->tw.spill_pages[i + 1] >= (pgno + npages) << 1);
+#else
+      mdbx_tassert(txn, i == 1 || txn->tw.spill_pages[i - 1] >= (pgno + npages)
+                                                                    << 1);
+#endif
       txn->tw.spill_pages[i] |= 1;
       if (i == MDBX_PNL_SIZE(txn->tw.spill_pages))
         MDBX_PNL_SIZE(txn->tw.spill_pages) -= 1;