# 
# patch "roster.cc"
#  from [1f6ef7086ae2bb3eef676cd35e795b20420367e7]
#    to [e89bd4067b9c09b13d887c04d08e9243f5f23c01]
# 
========================================================================
--- roster.cc	1f6ef7086ae2bb3eef676cd35e795b20420367e7
+++ roster.cc	e89bd4067b9c09b13d887c04d08e9243f5f23c01
@@ -608,6 +608,10 @@
   if (dirname.empty())
     {
       // detaching the root dir
+      {
+        // detaching the root dir is currently forbidden.
+        I(false);
+      }
       I(null_name(basename));
       node_id root_id = root_dir->self;
       safe_insert(old_locations,