[datatable-help] Bug? removing first column, can remove others ok

[Matthew Dowle]

Thanks. Timothée - please file a bug report on R-Forge.

"Chris Neff" <caneff at gmail.com> wrote in message 
news:CAAuY0RVr1qyizP6exZ8FnJ=HCOQRJ4eOGUPer8kAzhFMz46TeA at mail.gmail.com...
Verifying I get the exact same behavior.  64-bit linux here too.

2011/8/5 Timothée Carayol <timothee.carayol at gmail.com>:
> I have a problem, quite related to the one I was mentioning yesterday
> and earlier today; Matthew suggested I ask the list whether anyone
> else can reproduce it, or whether it's just my installation. Matthew's
> guess is that it's either my installation or anyone with 64-bit linux;
> so anyone running 64-bit unix based system is welcome to try the code
> below.
>
>
> This works:
>
>> A <- data.table(V1=1:10, V2=1:10)
>> A[, V2:=NULL]
> V1
> [1,] 1
> [2,] 2
> [3,] 3
> [4,] 4
> [5,] 5
> [6,] 6
> [7,] 7
> [8,] 8
> [9,] 9
> [10,] 10
>
>
> But this either crashes R (segfault) or returns the following error
> and corrupts the object:
>
>> A[, V1:=NULL]
> Error in data.table(lapply(x, function(x) { :
> 'translateCharUTF8' must be called on a CHARSXP
>
>
> The column names are irrelevant; the same error happens if I call them
> "a" and "b" (for example).
>
> The problem affects me both under data.table 1.6.3 and 1.6.4.
>
>
>
> sessionInfo()
> R version 2.13.1 (2011-07-08)
> Platform: x86_64-unknown-linux-gnu (64-bit)
>
> locale:
> [1] LC_CTYPE=en_GB.UTF-8 LC_NUMERIC=C
> LC_TIME=en_GB.UTF-8 LC_COLLATE=en_GB.UTF-8 LC_MONETARY=C
> [6] LC_MESSAGES=en_GB.UTF-8 LC_PAPER=en_GB.UTF-8 LC_NAME=C
> LC_ADDRESS=C LC_TELEPHONE=C
> [11] LC_MEASUREMENT=en_GB.UTF-8 LC_IDENTIFICATION=C
>
> attached base packages:
> [1] stats graphics grDevices utils datasets methods base
>
> other attached packages:
> [1] data.table_1.6.3
>
>
> Many thanks
> Timothee
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