1 files changed, 5 insertions, 1 deletions
diff --git a/gnuradio-runtime/lib/flat_flowgraph.cc b/gnuradio-runtime/lib/flat_flowgraph.cc
index 479943353b..1e9a682527 100644
--- a/gnuradio-runtime/lib/flat_flowgraph.cc
+++ b/gnuradio-runtime/lib/flat_flowgraph.cc
@@ -225,9 +225,10 @@ namespace gr {
           std::cout << "merge: allocating new detail for block " << (*p) << std::endl;
         block->set_detail(allocate_block_detail(block));
       }
-      else
+      else {
         if(FLAT_FLOWGRAPH_DEBUG)
           std::cout << "merge: reusing original detail for block " << (*p) << std::endl;
+      }
     }
 
     // Calculate the old edges that will be going away, and clear the
@@ -311,6 +312,9 @@ namespace gr {
       // Now deal with the fact that the block details might have
       // changed numbers of inputs and outputs vs. in the old
       // flowgraph.
+
+      block->detail()->reset_nitem_counters();
+      block->detail()->clear_tags();
     }
   }