With

> R.version.string
[1] "R version 2.15.0 alpha (2012-03-14 r58748)"

trying to trace a method using the 'signature' argument fails rather than enabling the trace:

> trace(initialize, signature="ANY")
Error in matchSignature(signature, fdef, where) :
trying to match a method signature of class “signature”; expects a list or a character vector

--
Computational Biology
Fred Hutchinson Cancer Research Center
1100 Fairview Ave. N. PO Box 19024 Seattle, WA 98109

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Telephone: 206 667-2793

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