From a0369e38d52367d10b7cc03b294cec01934c6d9d Mon Sep 17 00:00:00 2001
From: Wesley Shillingford <wezrule@hotmail.com>
Date: Fri, 22 Feb 2019 10:31:54 +0000
Subject: [PATCH] Check that full() in udf_buffer is not empty and assert
 (#1753)

---
 nano/node/node.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/nano/node/node.cpp b/nano/node/node.cpp
index e0e82b09..3b47d7f7 100644
--- a/nano/node/node.cpp
+++ b/nano/node/node.cpp
@@ -3853,12 +3853,13 @@ nano::udp_data * nano::udp_buffer::allocate ()
 		result = free.front ();
 		free.pop_front ();
 	}
-	if (result == nullptr)
+	if (result == nullptr && !full.empty ())
 	{
 		result = full.front ();
 		full.pop_front ();
 		stats.inc (nano::stat::type::udp, nano::stat::detail::overflow, nano::stat::dir::in);
 	}
+	release_assert (result || stopped);
 	return result;
 }
 void nano::udp_buffer::enqueue (nano::udp_data * data_a)