From 19d4cbefe849c221439f2d406d77e5d03c1ce1cf Mon Sep 17 00:00:00 2001
From: moneromooo-monero <moneromooo-monero@users.noreply.github.com>
Date: Sun, 26 May 2019 16:50:35 +0000
Subject: [PATCH] blockchain: do not try to pop blocks down to the genesis
 block

---
 src/cryptonote_core/blockchain.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/cryptonote_core/blockchain.cpp b/src/cryptonote_core/blockchain.cpp
index b143751af..45ead00e3 100644
--- a/src/cryptonote_core/blockchain.cpp
+++ b/src/cryptonote_core/blockchain.cpp
@@ -579,6 +579,9 @@ void Blockchain::pop_blocks(uint64_t nblocks)
 
   try
   {
+    const uint64_t blockchain_height = m_db->height();
+    if (blockchain_height > 0)
+      nblocks = std::min(nblocks, blockchain_height - 1);
     for (i=0; i < nblocks; ++i)
     {
       pop_block_from_blockchain();