[R] Stack overflow in R 2.10.0 with sub()

[Duncan Murdoch]

On 10/27/2009 1:05 PM, Kenneth Roy Cabrera Torres wrote:
> Thank you very much for your interest.
> 
> I make this:
> x <- as.character(alumnos$AL_NUME_ID)
> x <- x[-seq_len(length(x)/2)]
> save(x, file="x.RData")
> 
> I exit form R, and then restart R and I make this:
> 
> load("x.RData")
> y <- gsub("(^ +)|( +$)","",x)
> 
> It shows me:
> 
> Error en gsub("(^ +)|( +$)", "", x) : 
>   input string 66644 is invalid in this locale

I'm working on Windows, so I don't have the locale problem, but I do get 
the segfault.  I'll see if I can track down what is going wrong.

Duncan Murdoch

> I delete that string (it is a string with a non usual character (Ñ))
> 
> So, I retype without that observation.
> 
> y <- gsub("(^ +)|( +$)","",x[-c(66644)])
> 
> I got this:
> Error en gsub("(^ +)|( +$)", "", x[-c(66644)]) : 
>   input string 160689 is invalid in this locale
> 
> I retype again with this invalid string this way (I use the
>   160690 position, because the lag of the x vector)
> 
>> y <- gsub("(^ +)|( +$)","",x[-c(66644,160690)])
> Error: C produce desborde de pila en 'segfault'
> 
> And it fails.
> 
> I also repeat all the process with this conversion first.
> 
> x <- iconv(as.character(alumnos$AL_NUME_ID),"latin1","UTF-8")
> x <- x[-seq_len(length(x)/2)]
> save(x, file="x.RData")
> 
> And I exit, and restart R, and then I type
> 
> load("x.RData")
> y <- gsub("(^ +)|( +$)","",x)
> 
> And it fails again without showing me the "invalid string" errors.
> 
> I then make this:
> 
>  load("x.RData")
>  y <- gsub("(^ +)|( +$)","",x[1:160690])
> 
> and it works, then I type
> 
>  y <- gsub("(^ +)|( +$)","",x[1:200000]) #(x length is 454035)
> 
> and it works...
> 
> But I start to make a manual binary search,
> I found something that stills puzzle me.
> 
> y <- gsub("(^ +)|( +$)","",x[1:261570])
> 
> works, but sometimes fails (after I restart R),
> it always fails with index greather than 262000.
> 
> I see that there are not something inusual arround 261570.
> 
> x[261560:261580]
>  [1] "21444777             " "1147585              " "255202522
> "
>  [4] "25852100             " "24258550             " "A8D0251207
> "
>  [7] "34681811             " "19121345             " "16921329
> "
> [10] "20442195             " "14506482             " "44332211
> "
> [13] "35049122             " "34326340             " "35182366
> "
> [16] "33288742             " "34958795             " "1017147202
> "
> [19] "3306985              " "33048501             " "33295073
> "
> 
> I am sending you the x.Rdata file to see if you can
> reproduce my problem.
> 
> This infomation may be useful:
> 
>  sessionInfo()
> 
> R version 2.10.0 (2009-10-26) 
> x86_64-unknown-linux-gnu 
> 
> locale:
>  [1] LC_CTYPE=es_CO.UTF-8       LC_NUMERIC=C              
>  [3] LC_TIME=es_CO.UTF-8        LC_COLLATE=es_CO.UTF-8    
>  [5] LC_MONETARY=C              LC_MESSAGES=es_CO.UTF-8   
>  [7] LC_PAPER=es_CO.UTF-8       LC_NAME=C                 
>  [9] LC_ADDRESS=C               LC_TELEPHONE=C            
> [11] LC_MEASUREMENT=es_CO.UTF-8 LC_IDENTIFICATION=C       
> 
> attached base packages:
> [1] stats     graphics  grDevices utils     datasets  methods   base 
> 
>  R.Version()
> 
> $platform
> [1] "x86_64-unknown-linux-gnu"
> $arch
> [1] "x86_64"
> $os
> [1] "linux-gnu"
> $system
> [1] "x86_64, linux-gnu"
> $status
> [1] ""
> $major
> [1] "2"
> $minor
> [1] "10.0"
> $year
> [1] "2009"
> $month
> [1] "10"
> $day
> [1] "26"
> $`svn rev`
> [1] "50208"
> $language
> [1] "R"
> $version.string
> [1] "R version 2.10.0 (2009-10-26)"
> 
> gcc --version and g++ --verision shows me:
> 
> gcc (Ubuntu 4.3.3-5ubuntu4) 4.3.3
> Copyright (C) 2008 Free Software Foundation, Inc.
> Esto es software libre; vea el código para las condiciones de copia.  NO
> hay
> garantía; ni siquiera para MERCANTIBILIDAD o IDONEIDAD PARA UN PROPÓSITO
> EN
> PARTICULAR
> 
> When I compile R I use this option in configuration (nothing more)
> 
> ./configure --enable-R-shlib
> make 
> sudo make install
> 
> At the moment I have 22Gb of swap partition (keeping monitor tracking
> the systems is not using it) and 4GB of RAM.
> 
> Again, thank you very much for your help.
> 
> Kenneth
> 
> 
> 
> 
>