[datatable-help] Random segfaults

[Chris Neff]

64 bit 2.12.1 linux.

Is there an option I can set in my session in order to work around the
truelength issue? I don't care if I lose some of the over-allocation
niceties if it stops things from crashing. Looking at the truelength
help, would just doing:

options(datatable.alloc=quote(1000))

stop this? I never have more than about 50 columns at a time.

On 14 December 2011 11:43, Matthew Dowle <mdowle at mdowle.plus.com> wrote:
>
> You're R < 2.14.0, right?  I'm really struggling in R < 2.14.0 to make
> over-allocation work because R only started to initialize truelength to 0
> in R 2.14.0+. Before that it's unitialized (random). Trouble is my
> attempts in R < 2.14.0 to work around that work fine for me in linux 32bit
> when I test in R 2.13.2, and I even test in 2.12.0 too. I test on 64bit
> too but just 2.14.0.  CRAN is also showing errors on 2.13.2 (old-rel) for
> both mac and windows.
>
> So, this is a pre-2.14.0 (only) problem that I'll continue to try and fix.
>
> Are you 64bit pre-2.14.0? Which OS?  If you are 64bit linux then it adds
> weight to me installing pre-2.14.0 on my 64bit instance in an effort to
> reproduce.
>
>
>> This will be a crappy help request because I can't seem to reproduce
>> it, but the past few days I've been getting a lot of segfaults.  The
>> only common thing between every crash is that it happens when I do
>>
>> DT[, z := x]
>>
>> where z was not a column that existed in DT before, and x is either an
>> existing column of DT or a separate variable, doesn't matter.  Beyond
>> that I can't reproduce a set of steps that gets R to crash.  This is
>> with the latest SVN version.
>>
>> Is there more information I can provide to help track this down?
>> _______________________________________________
>> datatable-help mailing list
>> datatable-help at lists.r-forge.r-project.org
>> https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/datatable-help
>>
>
>