.

wcfs/internal/xbtree.py

@@ -237,7 +237,11 @@ def TopoDecode(text):
                 typ = Bucket
             else:
                 raise TopoDecodeError("incorrect node %s: unknown prefix" % qq(tnode))
-            tkeyv = tnode[1:].split(',')    # e.g. 7 8 9
+            tkeys = tnode[1:]    # e.g. '7,8,9' or ''
+            if tkeys == '':
+                keyv = []
+            else:
+                tkeyv = tkeys.split(',')    # e.g. 7 8 9
                 keyv  = [int(_) for _ in tkeyv]
             if typ is Bucket:
                 node = Bucket(*keyv)
@@ -258,7 +262,7 @@ def TopoDecode(text):
             raise TopoDecodeError("level %d does not link to all nodes in the next level" %
                                   len(levelv+1))
 
-    if len(currentv) != 0:
+    if len(currentv) != 1:
         raise TopoDecodeError("first level has %d entries; must be 1" % len(currentv))
 
     root = currentv[0]