From dabd0fe2a0b25739cd6dac03d464479735df0c38 Mon Sep 17 00:00:00 2001
From: Alex Rousskov <rousskov@measurement-factory.com>
Date: Sat, 19 Dec 2015 01:50:46 +1300
Subject: [PATCH] Fix startup crash with a misconfigured (too-small) shared
 memory cache

Controller condition for allocating MemStore is slightly different from
MemStore condition for allocating MemStore::map, resulting in MemStore
without a map. Until that discrepancy is fixed, be careful when
dereferencing MemStore::map.
---
 src/MemStore.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/MemStore.cc b/src/MemStore.cc
index a53ecf6346..d4bc939448 100644
--- a/src/MemStore.cc
+++ b/src/MemStore.cc
@@ -725,7 +725,7 @@ MemStore::unlink(StoreEntry &e)
     if (e.mem_obj && e.mem_obj->memCache.index >= 0) {
         map->freeEntry(e.mem_obj->memCache.index);
         disconnect(e);
-    } else {
+    } else if (map) {
         // the entry may have been loaded and then disconnected from the cache
         map->freeEntryByKey(reinterpret_cast<cache_key*>(e.key));
     }
-- 
2.47.2