From murdoch.duncan at gmail.com  Wed Nov 24 17:26:13 2010
From: murdoch.duncan at gmail.com (Duncan Murdoch)
Date: Wed, 24 Nov 2010 11:26:13 -0500
Subject: [Rd] segfault interest?
In-Reply-To: <AANLkTikfV39Sj+E=GfGL1a8+M+DUgzrF_n+uGKoMPowY@mail.gmail.com>
References: <AANLkTikfV39Sj+E=GfGL1a8+M+DUgzrF_n+uGKoMPowY@mail.gmail.com>
Message-ID: <4CED3CA5.605@gmail.com>

On 24/11/2010 11:18 AM, ivo welch wrote:
> in a long program, I ran into
>
>   *** caught segfault ***
> address 0xdc3f9b48, cause 'memory not mapped'
> Traceback:
>   1: rep.int(seq_len(nx), rep.int(rep.fac, nx))
>   2: rep.int(rep.int(seq_len(nx), rep.int(rep.fac, nx)), orep)
>   3: expand.grid(seq_len(nx), seq_len(ny))
>   4: merge.data.frame(d, ss)
>   5: merge(d, ss)
>   6: valid.range(opt)
>   7: eval.with.vis(expr, envir, enclos)
>   8: eval.with.vis(ei, envir)
>   9: source("fut-into-opts.R")
> Possible actions:
> 1: abort (with core dump, if enabled)
> 2: normal R exit
> 3: exit R without saving workspace
> 4: exit R saving workspace
>
>
> I am pretty sure that I can program around it (and it is probably
> caused by my writing some error), but because it is replicable, I just
> wanted to learn if anyone is interested.  oh---the program is pure R
> code, nothing special (like linked in C code or stuff like this).  the
> error occurs on OSX.  if there is interest, please email me and let me
> know what would be most useful to supply.  if not, fine, too.

Yes, we're interested in segfaults that are due to bugs in R.  (If they 
require a contributed package to trigger them, then they are often bugs 
in the package, and you should start with the package maintainer.)

The general request is to simplify your code as much as possible, and 
submit a self-contained demo.  If we can't reproduce the bug, we are 
unlikely to be able to fix it, and might not even try.  See ?bug.report 
for details on what to include, but don't follow the instructions there 
for submission, because they're out of date:  go to 
https://bugs.r-project.org instead.

Duncan Murdoch

> regards,
>
> /iaw
> ----
> Ivo Welch (ivo.welch at brown.edu, ivo.welch at gmail.com)
>
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel



[Rd] segfault interest?
Duncan Murdoch