In [1], the following language appears: Note that [PutForwards] <http://www.w3.org/TR/WebIDL/#PutForwards> > -annotated attributes <http://www.w3.org/TR/WebIDL/#dfn-attribute> can be > chained. That is, an attribute with the [PutForwards]<http://www.w3.org/TR/WebIDL/#PutForwards> > extended attribute <http://www.w3.org/TR/WebIDL/#dfn-extended-attribute> can > refer to an attribute that itself has that extended attribute. Theremust > not exist a cycle in a chain of forwarded assignments. A cycle exists if, > when following the chain of forwarded assignments, a particular attribute > on an interface <http://www.w3.org/TR/WebIDL/#dfn-interface> is > encountered more than once. While this states that a cycle must not exist, it fails to define implementation behavior regarding cycle detection and action in the presence of a cycle. If this is intentionally left undefined, perhaps that should be stated. [1] http://www.w3.org/TR/WebIDL/#PutForwardsReceived on Saturday, 4 August 2012 16:51:09 UTC
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