From 45a1c4c0885584554668c89bd6976474af01e2f5 Mon Sep 17 00:00:00 2001
From: moneromooo-monero <moneromooo-monero@users.noreply.github.com>
Date: Mon, 11 Dec 2017 22:36:58 +0000
Subject: add empty container sanity checks when using front() and back()

---
 src/cryptonote_protocol/block_queue.cpp | 1 +
 1 file changed, 1 insertion(+)

(limited to 'src/cryptonote_protocol/block_queue.cpp')

diff --git a/src/cryptonote_protocol/block_queue.cpp b/src/cryptonote_protocol/block_queue.cpp
index bfff35456..9e38ffbcb 100644
--- a/src/cryptonote_protocol/block_queue.cpp
+++ b/src/cryptonote_protocol/block_queue.cpp
@@ -62,6 +62,7 @@ void block_queue::add_blocks(uint64_t height, std::list<cryptonote::block_comple
 
 void block_queue::add_blocks(uint64_t height, uint64_t nblocks, const boost::uuids::uuid &connection_id, boost::posix_time::ptime time)
 {
+  CHECK_AND_ASSERT_THROW_MES(nblocks > 0, "Empty span");
   boost::unique_lock<boost::recursive_mutex> lock(mutex);
   blocks.insert(span(height, nblocks, connection_id, time));
 }
-- 
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