[R] polygon kills X-server

[Uwe Ligges]

Ludo Pagie wrote:
> Hi all,
> 
> when I make a polygon with 100,000 vertices my X-server is being
> killed. This occurs in R-2.9.0 and a freshly installed R-2.10.0
> I'm running Ubuntu with a locally compiled R:
> 
> uname -a
> Linux onyx 2.6.24-24-generic #1 SMP Tue Aug 18 16:22:17 UTC 2009
> x86_64 GNU/Linux
> 
> xlower = -2e6:2e6
> xupper = rev(xlower)
> ylower = runif(length(xlower))
> yupper = ylower+.1
> plot(NA,xlim=range(xlower),ylim=range(ylower))
> idx=1:10000
> # it draws fine for lower number of vertices:
> polygon(x=c(xlower[idx],xupper[idx]),y=c(ylower[idx],yupper[idx]),col='grey')
> # but X is killed when I draw 100000 vertices or more
> idx=1:100000
> # I've commented the next call to prevent people accidently
> # killing their X?
> #polygon(x=c(xlower[idx],xupper[idx]),y=c(ylower[idx],yupper[idx]),col='grey')



This one is extraordinary dangerous: it also killed my kind of X server 
called Windows completely so that I had to reset the machine.

Perhaps it should be debugged on the Linux side with less serious side 
effects....

Probably you found some bugs in the X server / Windows operating 
systems. Nevertheless, R should take care as well. This one is really 
worth a bug report. Can you file a bug report, please?

Best wishes,
Uwe Ligges





>> sessionInfo()
> R version 2.10.0 (2009-10-26) 
> x86_64-unknown-linux-gnu 
> 
> locale:
> [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C              
> [3] LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8    
> [5] LC_MONETARY=C              LC_MESSAGES=en_US.UTF-8   
> [7] LC_PAPER=en_US.UTF-8       LC_NAME=C                 
> [9] LC_ADDRESS=C               LC_TELEPHONE=C            
> [11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C       
> 
> attached base packages:
> [1] stats     graphics  grDevices utils     datasets
> methods   base     
> 
> 
> I'm sorry for the messy/non-intelligent code but I'm not eager
> to clean it up and check it .... 
> 
> 
> Any idea what might being going on here?
> 
> Thanks, Ludo
> 
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