From Troy.Robertson at aad.gov.au  Thu Oct  7 03:12:37 2010
From: Troy.Robertson at aad.gov.au (Troy Robertson)
Date: Thu, 7 Oct 2010 12:12:37 +1100
Subject: [Rd] Recursion error after upgrade to R_2.11.1
	[Sec=Unclassified]
Message-ID: <42C7503E0B99F248B06BC65E7D2B4E020187DD7258BC@EX2K7-CCR.AAD.GOV.AU>

Hi all,

After no replies to my previous message I thought I might show some code to demonstrate the change and again seek any explanation for the error now thrown by my code after upgrading from 2.10.1 to 2.11.1.

Thanks
Troy
--------------------------------------------------------
setClass("PortableObject",
        representation(test1    = "character"),

        prototype(      test1   = ""),
          contains = ".environment"
)

setMethod("initialize", "PortableObject",
    function(.Object, ..., .xData=new.env(parent=emptyenv())) {
                .Object <- callNextMethod(.Object, ..., .xData=.xData)

                .Object at test1 <- "Foo"
                # Following line works under 2.10.1 but now throws
                # Error: evaluation nested too deeply: infinite recursion / options(expressions=)?
                #####.Object[["test2"]] <- "Bar"
                # The following does what I want though
                .Object$test3 <- "Baa"

                return(.Object)
        }
)

e <- new("PortableObject")

alterEGo <- function(o = "EPOCObject") {
        o at test1 <- "Boo"

        # Following line works under 2.10.1 but now throws
        # Error: evaluation nested too deeply: infinite recursion / options(expressions=)?
        ####o[["test2"]] <- "Who"
        # The following does what I want though
        o$test3 <- "Hoo"

        # NOTE: No return
}

alterEGo(e)
e at test1
e$test2
e[["test3"]]
e at .xData[["test3"]]
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[Rd] Recursion error after upgrade to R_2.11.1 [Sec=Unclassified]
Troy Robertson