From fa4d98b3c8e63f20c6f366fc9382039ba52614a4 Mon Sep 17 00:00:00 2001
From: MarcoFalke <*~=`'#}+{/-|&$^_@721217.xyz>
Date: Wed, 13 Mar 2024 15:15:42 +0100
Subject: [PATCH] Avoid divide-by-zero in header sync logs when NodeClock is
 behind

---
 src/validation.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/validation.cpp b/src/validation.cpp
index a2300104970..a9d9f9d207c 100644
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -4189,6 +4189,7 @@ bool ChainstateManager::ProcessNewBlockHeaders(const std::vector<CBlockHeader>&
         if (IsInitialBlockDownload() && ppindex && *ppindex) {
             const CBlockIndex& last_accepted{**ppindex};
             int64_t blocks_left{(NodeClock::now() - last_accepted.Time()) / GetConsensus().PowTargetSpacing()};
+            blocks_left = std::max<int64_t>(0, blocks_left);
             const double progress{100.0 * last_accepted.nHeight / (last_accepted.nHeight + blocks_left)};
             LogInfo("Synchronizing blockheaders, height: %d (~%.2f%%)\n", last_accepted.nHeight, progress);
         }
@@ -4215,6 +4216,7 @@ void ChainstateManager::ReportHeadersPresync(const arith_uint256& work, int64_t
     GetNotifications().headerTip(GetSynchronizationState(initial_download), height, timestamp, /*presync=*/true);
     if (initial_download) {
         int64_t blocks_left{(NodeClock::now() - NodeSeconds{std::chrono::seconds{timestamp}}) / GetConsensus().PowTargetSpacing()};
+        blocks_left = std::max<int64_t>(0, blocks_left);
         const double progress{100.0 * height / (height + blocks_left)};
         LogInfo("Pre-synchronizing blockheaders, height: %d (~%.2f%%)\n", height, progress);
     }