R devel - Jan 2005 - R 2.1 dies when some text() arguments are NULL (PR#7477)

[My very deepest apologies in advance if this is not plain text; I am 
recently at a new job in a windows-based environment and have 
not yet set up my favorite old (pine) system. I have tried my best to 
strip all formatting from the message..]

I'm overlaying plots of tree locations mapped before and after 
logging activities and checking my matched individuals using 
several arguments to text() which plot tree attributes by or 
near their (x,y) locations. R 2.1 dies when a coding error on 
my part results in a null data.frame...

Example: 

plot(1)
text(NULL ~ NULL, label=NULL)

This happens for me under Windows 98 and XP. Andrew Robinson 
was kind enough to try it for me on FreeBSD with the same result. 
The code returns nothing for me under R 1.9 on Windows 98 and 
XP (same win. machines).  The version details of the three 
are as follows:

# FreeBSD:
>version
         _                      
platform i386-portbld-freebsd5.3
arch     i386                   
os       freebsd5.3             
system   i386, freebsd5.3       
status                          
major    2                      
minor    0.1                    
year     2004                   
month    11                     
day      15                     
language R                      

# Windows XP:
> version
         _              
platform i386-pc-mingw32
arch     i386           
os       mingw32        
system   i386, mingw32  
status                  
major    2              
minor    0.1            
year     2004           
month    11             
day      15             
language R       

# Windows 98:
> version
         _              
platform i386-pc-mingw32
arch     i386           
os       mingw32        
system   i386, mingw32  
status                  
major    2              
minor    0.1            
year     2004           
month    11             
day      15             
language R           

Please let me know if I can add any more details-

Thank you,

Rob 

_________________________________________________________

Rob Keefe

Cooperative Forestry Research Unit
University of Maine

On Fri, 2005-01-07 at 04:44 +0100, Robert_Keefe@umit.maine.edu
wrote:
> 
> [My very deepest apologies in advance if this is not plain text; I am 
> recently at a new job in a windows-based environment and have 
> not yet set up my favorite old (pine) system. I have tried my best to 
> strip all formatting from the message..]
> 
> I'm overlaying plots of tree locations mapped before and after 
> logging activities and checking my matched individuals using 
> several arguments to text() which plot tree attributes by or 
> near their (x,y) locations. R 2.1 dies when a coding error on 
> my part results in a null data.frame...
> 
> Example: 
> 
> plot(1)
> text(NULL ~ NULL, label=NULL)
> 
> This happens for me under Windows 98 and XP. Andrew Robinson 
> was kind enough to try it for me on FreeBSD with the same result. 
> The code returns nothing for me under R 1.9 on Windows 98 and 
> XP (same win. machines).  The version details of the three 
> are as follows:
> 
> # FreeBSD:
> 
> >version
>          _                      
> platform i386-portbld-freebsd5.3
> arch     i386                   
> os       freebsd5.3             
> system   i386, freebsd5.3       
> status                          
> major    2                      
> minor    0.1                    
> year     2004                   
> month    11                     
> day      15                     
> language R                      
> 
> # Windows XP:
> 
> > version
>          _              
> platform i386-pc-mingw32
> arch     i386           
> os       mingw32        
> system   i386, mingw32  
> status                  
> major    2              
> minor    0.1            
> year     2004           
> month    11             
> day      15             
> language R       
> 
> # Windows 98:
> 
> > version
>          _              
> platform i386-pc-mingw32
> arch     i386           
> os       mingw32        
> system   i386, mingw32  
> status                  
> major    2              
> minor    0.1            
> year     2004           
> month    11             
> day      15             
> language R           
> 
> Please let me know if I can add any more details-
> 
> Thank you,
> 
> Rob 
Your subject line and body refer to R version 2.1, which technically
does not exist as 2.1.0 is the current development version. 

However, your output above indicates that R version 2.0.1 is what you
have installed on the three platforms. That is the current released
version.

In either case, using:

Version 2.0.1 Patched (2005-01-02)

I get the following:
> plot(1)
> text(NULL ~ NULL, label=NULL)
Error in text(xy.coords(x, y, recycle = TRUE), labels, adj, pos,
offset,  :
        no coordinates were supplied


Same thing with:
> plot(1)
> text(NULL, NULL, label = NULL)
Error in text.default(NULL, NULL, label = NULL) :
        x and y lengths differ in text().


No crash.


There is the following note in the NEWS file for 2.0.1 patched:

"text()'s default method could segfault if passed 0-length
coordinates."

So I believe that this fixes the issue that you have posted about.


A patched version for Windows is available via CRAN:

http://www.cran.mirrors.pair.com/bin/windows/base/rpatched.html

and a source code tarball is available for the *nix versions via the FTP
link under the R Sources link:

ftp://ftp.stat.math.ethz.ch/Software/R/

HTH,

Marc Schwartz