Can someone confirm the following as a problem:
R> setClass("Foo", representation(.handle = "externalptr"))
R> object.size(new("Foo"))
Error in object.size(new("Foo")) : object.size: unknown type 22
R> R.version.string
[1] "R version 2.1.1, 2005-06-20"
R-2.1.1/src/include/Rinternals.h
#define EXTPTRSXP 22 /* external pointer */
R-2.1.1/src/main/size.c:
objectsize(SEXP s) has no case for external pointers
----------------------------------------------------------
SIGSIG -- signature too long (core dumped)
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