diff -r 023526b7e572 -r 30183e60a824 src/mem/ruby/structures/CacheMemory.cc
--- a/src/mem/ruby/structures/CacheMemory.cc	Tue Sep 01 22:56:53 2015 -0500
+++ b/src/mem/ruby/structures/CacheMemory.cc	Wed Sep 02 08:44:53 2015 -0500
@@ -263,6 +263,9 @@
     std::vector<AbstractCacheEntry*> &set = m_cache[cacheSet];
     for (int i = 0; i < m_cache_assoc; i++) {
         if (!set[i] || set[i]->m_Permission == AccessPermission_NotPresent) {
+            if (set[i] && (set[i] != entry)) {
+                delete set[i];
+            }
             set[i] = entry;  // Init entry
             set[i]->m_Address = address;
             set[i]->m_Permission = AccessPermission_Invalid;