Trying to find buffering deadlock

secondary.py

@@ -134,8 +134,11 @@ class Backup:
         parent = os.path.dirname(src.name)
         while len(parent) != 0:
             # Make sure directories get the correct modes
+            print('Parent:', parent, file=sys.stderr)
             self.primary_in.write(parent + b'\0')
             parent = os.path.dirname(parent)
+            pass
+        print('File:', src.name, file=sys.stderr)
         self.primary_in.write(src.name + b'\0')
         self.primary_in.flush()