.

wcfs/internal/xbtree.py

@@ -148,11 +148,16 @@ def IterAllStructs(keys, maxdepth, maxsplit):
     keyv.sort()
 
     # initial [lo, hi) covering keys with +-1
-    klo = -inf
-    khi = +inf
+    #klo = -inf
+    #khi = +inf
     if len(keyv) > 0:
         klo = keyv[0]  - 1
         khi = keyv[-1] + 1 + 1   # hi is ")", not "]"
+    else:
+        # XXX ok? (should be -inf,+inf)
+        klo = 0
+        khi = 5
+
 
     for tree in _iterAllStructs(klo, khi, keyv, maxdepth, maxsplit):
         yield tree