From feecf7c76380de3dc2056c94e935777a80199b0e Mon Sep 17 00:00:00 2001
From: csoler <csoler@users.sourceforge.net>
Date: Thu, 21 Jan 2021 18:15:02 +0100
Subject: [PATCH] added safeguard against crash in dir_hierarchy

---
 libretroshare/src/file_sharing/dir_hierarchy.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libretroshare/src/file_sharing/dir_hierarchy.cc b/libretroshare/src/file_sharing/dir_hierarchy.cc
index 31ba93eb3..d93df1d1b 100644
--- a/libretroshare/src/file_sharing/dir_hierarchy.cc
+++ b/libretroshare/src/file_sharing/dir_hierarchy.cc
@@ -647,7 +647,8 @@ uint64_t InternalFileHierarchyStorage::recursUpdateCumulatedSize(const Directory
     uint64_t local_cumulative_size = 0;
 
     for(uint32_t i=0;i<d.subfiles.size();++i)
-        local_cumulative_size += static_cast<FileEntry*>(mNodes[d.subfiles[i]])->file_size;
+        if(mNodes[d.subfiles[i]])		// normally not needed, but an extra-security
+            local_cumulative_size += static_cast<FileEntry*>(mNodes[d.subfiles[i]])->file_size;
 
     for(uint32_t i=0;i<d.subdirs.size();++i)
         local_cumulative_size += recursUpdateCumulatedSize(d.subdirs[i]);