Fixed sizeof?

construct/core.py

@@ -540,7 +540,7 @@ def _parse(self, stream, context):
     def _build(self, obj, stream, context):
         if not isinstance(obj, collections.Sequence):
             raise RangeError("expected sequence type, found %s" % type(obj))
-        if len(obj) < self.mincount or len(obj) > self.maxcount:
+        if not len(context) <= self.mincount <= self.maxcount <= len(context):
             raise RangeError("expected %d to %d, found %d" %
                 (self.mincount, self.maxcount, len(obj)))
         cnt = 0
@@ -563,6 +563,7 @@ def _build(self, obj, stream, context):
                     (self.mincount, self.maxcount, len(obj)), sys.exc_info()[1])
 
     def _sizeof(self, context):
+        print("range sizeof context=",context)
         if context is None:
             raise SizeofError("cannot calculate size")
         if not len(context) <= self.mincount <= self.maxcount <= len(context):