From 733ee5a5c37285c95654692f35596627aebf3311 Mon Sep 17 00:00:00 2001
From: Thomas Harte <thomas.harte@gmail.com>
Date: Thu, 17 Aug 2017 15:30:02 -0400
Subject: [PATCH] Ensured no attempt to put a null track into the cache

---
 Storage/Disk/Disk.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Storage/Disk/Disk.cpp b/Storage/Disk/Disk.cpp
index 5844e1bea..ffd714385 100644
--- a/Storage/Disk/Disk.cpp
+++ b/Storage/Disk/Disk.cpp
@@ -37,6 +37,7 @@ std::shared_ptr<Track> Disk::get_track_at_position(unsigned int head, unsigned i
 
 	std::lock_guard<std::mutex> lock_guard(file_access_mutex_);
 	std::shared_ptr<Track> track = get_uncached_track_at_position(head, position);
+	if(!track) return nullptr;
 	cached_tracks_[address] = track;
 	return track;
 }