[R] R crashing oddly

[Viechtbauer Wolfgang (STAT)]

A similar problem was mentioned before:

https://stat.ethz.ch/pipermail/r-sig-mixed-models/2008q3/001425.html

There appears to be a bug in the C code leading to memory corruption.

Best,

--
Wolfgang Viechtbauer                        http://www.wvbauer.com/
Department of Methodology and Statistics    Tel: +31 (0)43 388-2277
School for Public Health and Primary Care   Office Location:
Maastricht University, P.O. Box 616         Room B2.01 (second floor)
6200 MD Maastricht, The Netherlands         Debyeplein 1 (Randwyck)


----Original Message----
From: r-help-bounces at r-project.org
[mailto:r-help-bounces at r-project.org] On Behalf Of Michael Steven
Rooney Sent: Wednesday, April 21, 2010 17:41 To: r-help at r-project.org
Subject: [R] R crashing oddly

> Hi,
>
> I am working with the package nlme, and I tried creating a new
> correlation class (which, according to the help pages, is possible if
> you write a few new method functions). Anyways, I think I am 99% of
> the way there, but I have a recurring problem with R crashing on
> seemingly innocuous statements (I have set debug() on nearly every
> function, so I can see where it is failing).
>
> For instance, sometime the code fails on the simple statement:
> object[[i]] Two things are odd about this: 1. It's not the first time
> I call object[[i]] 2. If I run save() on the object just before the
> crash, open the object in a new workspace and run object[[i]], then
> no crash or error occurs.
>
> "[[" is not the only function that has been giving me grief. Certain
> C routines that get called multiple time have displayed very similar
> behavior (ie. they work fine several times before they crash, and if
> the object is exported just before the crash and the routine is
> called in a new workspace there is no error).
>
> The behavior kind of reminds me of the craziness that occur with an
> uninitialized pointer (thinking back to coding in C in college). The
> other thing that points me in that direction is that Windows returns
> an error code ending ...00005, which I believe indicates a
> segmentation fault. I was also wondering whether there might be some
> rogue global variable, but I have no idea what.
>
> I have struggling with this for a week. Does anyone have any insights
> on what might be wrong or what I might try?
>
> Thanks so much,
> Mike
>
>       [[alternative HTML version deleted]]
>
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