R devel - Oct 2002 - Core dump with "parse" (PR#2120)

Hi everyone,

The following code may not be very sensible, but it generates a core dump.  The
same happens in R-1.5.1.

Cheers, Jonathan.

arrow:dma0jcr% R-1.6.0

R : Copyright 2002, The R Development Core Team
Version 1.6.0  (2002-10-01)

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type `license()' or `licence()' for distribution details.

R is a collaborative project with many contributors.
Type `contributors()' for more information.

Type `demo()' for some demos, `help()' for on-line help, or
`help.start()' for a HTML browser interface to help.
Type `q()' to quit R.
> parse(text=deparse(body(plot)))
expression({
    if (is.null(attr(x, "class")) && is.function(x)) {
        if ("ylab" 0names(list(...))) 
            plot.function(x, ...)
        else plot.function(x, ylab = paste(deparse(substitute(x)), 
            "(x)"), ...)
    }
    else UseMethod("plot")
})
Segmentation fault (core dumped)



--please do not edit the information below--

Version:
 platform = i686-pc-linux-gnu
 arch = i686
 os = linux-gnu
 system = i686, linux-gnu
 status = 
 major = 1
 minor = 6.0
 year = 2002
 month = 10
 day = 01
 language = R

Search Path:
 .GlobalEnv, Autoloads, package:base

-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To:
r-devel-request@stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._

On my GNU/Linux box running 1.6.0, I get

marla:> R --vanilla

R : Copyright 2002, The R Development Core Team
Version 1.6.0  (2002-10-01)

[...]
> parse(text=deparse(body(plot)))
expression({
    if (is.null(attr(x, "class")) && is.function(x)) {
        if ("ylab" 0names(list(...))) 
            plot.function(x, ...)
        else plot.function(x, ylab = paste(deparse(substitute(x)), 
            "(x)"), ...)
    }
    else UseMethod("plot")
})
> version
         _                
platform i686-pc-linux-gnu
arch     i686             
os       linux-gnu        
system   i686, linux-gnu  
status                    
major    1                
minor    6.0              
year     2002             
month    10               
day      01               
language R                


But on one of our OS X servers running R 1.5.1, I get:

galton:> R --vanilla

R : Copyright 2002, The R Development Core Team
Version 1.5.1  (2002-06-17)

[...]
> parse(text = deparse(body(plot)))
expression({
    if (is.null(attr(x, "class")) && is.function(x)) {
Bus error

I can't tell what the problem is though.

-roger
_______________________________
UCLA Department of Statistics
rpeng@stat.ucla.edu
http://www.stat.ucla.edu/~rpeng

On Mon, 7 Oct 2002, j.c.rougier@durham.ac.uk wrote:
> Hi everyone,
> 
> The following code may not be very sensible, but it generates a core
> dump.  The same happens in R-1.5.1.
> 
> Cheers, Jonathan.
> 
> arrow:dma0jcr% R-1.6.0
> 
> R : Copyright 2002, The R Development Core Team
> Version 1.6.0  (2002-10-01)
> 
> R is free software and comes with ABSOLUTELY NO WARRANTY.
> You are welcome to redistribute it under certain conditions.
> Type `license()' or `licence()' for distribution details.
> 
> R is a collaborative project with many contributors.
> Type `contributors()' for more information.
> 
> Type `demo()' for some demos, `help()' for on-line help, or
> `help.start()' for a HTML browser interface to help.
> Type `q()' to quit R.
> 
> > parse(text=deparse(body(plot)))
> expression({
>     if (is.null(attr(x, "class")) && is.function(x)) {
>         if ("ylab" 0names(list(...))) 
>             plot.function(x, ...)
>         else plot.function(x, ylab = paste(deparse(substitute(x)), 
>             "(x)"), ...)
>     }
>     else UseMethod("plot")
> })
> Segmentation fault (core dumped)
> 
> 
> 
> --please do not edit the information below--
> 
> Version:
>  platform = i686-pc-linux-gnu
>  arch = i686
>  os = linux-gnu
>  system = i686, linux-gnu
>  status = 
>  major = 1
>  minor = 6.0
>  year = 2002
>  month = 10
>  day = 01
>  language = R
> 
> Search Path:
>  .GlobalEnv, Autoloads, package:base
> 
>
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
> r-devel mailing list -- Read
http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
> Send "info", "help", or "[un]subscribe"
> (in the "body", not the subject !)  To:
r-devel-request@stat.math.ethz.ch
>
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
> 

-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To:
r-devel-request@stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._

On Mon, 7 Oct 2002 j.c.rougier@durham.ac.uk wrote:
> Hi everyone,
>
> The following code may not be very sensible, but it generates a core
> dump.  The same happens in R-1.5.1.
It doesn't generate a core dump for me in either version, but it doesn't
work correctly either.

A simpler version is:
> parse(text="a %in% b")
expression(a 0n% b)

It looks like the %i is being used as a printf format string, which might
well cause a core dump.

This isn't happening inside parse, but inside print,
since
> parse(text="a %in% b")[[1]]
a %in% b


	-thomas


-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To:
r-devel-request@stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._