[R-SIG-Mac] Problems with packages that require Gtk2

[John Maindonald]

I've had a brief exchange of emails, to which Simon is privy, with  
Michael Lawrence.

"From what I've heard, people who compile the entire toolchain, i.e.  
do not use Simon's GTK+, cairo, etc binaries, do not have a problem  
with cairoDevice on the Mac. ... In the past, the seg faults were  
occuring in the font handling code, whenever rotated text was drawn.  
Of course, this is probably just a sign of memory corruption  
elsewhere, but my guess is that's related to the Pango/Cairo  
interaction."

Has anyone had success going this route (compiling the entire  
toolchain)?  If one does go this route, how should it be done?   
Install MacPorts and follow the instructions on the MacPorts web  
page?  I found detailed instructions on a web page that is designed to  
make it possible to reproduce a problem with fonts:
http://trac.macports.org/ticket/15626


John Maindonald             email: john.maindonald at anu.edu.au
phone : +61 2 (6125)3473    fax  : +61 2(6125)5549
Centre for Mathematics & Its Applications, Room 1194,
John Dedman Mathematical Sciences Building (Building 27)
Australian National University, Canberra ACT 0200.


On 23/09/2008, at 11:32 PM, Simon Urbanek wrote:

>
> On Sep 23, 2008, at 0:20 , John Maindonald wrote:
>
>> Has anyone been able to get packages that rely on Gtk2 to run under  
>> Leopard?
>>
>
> Yes, I see no problem with Gtk2.
>
>
>> I have experimented with the playwith package, as depending on a  
>> small number of packages additional to Gtk2.   I can pretty  
>> consistently generate a bus error by attaching playwith, then  
>> printing a lattice object.  Note that I have not run any functions  
>> from the playwith package.
>>
>> The same may happen if I attach all the packages on which playwith  
>> depends (but not playwith itself), but the bus error does not  
>> appear with the same consistency.
>>
>
> The problem appears to be in Michael's carioDevice, it crashes  
> because its cairo context is NULL. I suspect it may not have a good  
> error handling. I'm not sure what causes the problem, you may try to  
> contact Michael. Neither the built-in R cairo device nor the Cairo  
> package have any problems, so I don't think it's a problem on the  
> cairo side...
>
> Cheers,
> Simon
>
>
>> Here is a transcript on a session:
>>
>> [Previously saved workspace restored]
>>
>> > options(STERM='iESS', editor='emacsclient')
>> > library(lattice)
>> > library(playwith)
>> Loading required package: latticeExtra
>> Loading required package: RColorBrewer
>> Loading required package: grid
>> Loading required package: gWidgets
>> Loading required package: gWidgetsRGtk2
>> Loading required package: RGtk2
>> Loading required package: cairoDevice
>> > sessionInfo()
>> R version 2.7.2 (2008-08-25)
>> i386-apple-darwin8.11.1
>>
>> locale:
>> C
>>
>> attached base packages:
>> [1] grid      stats     graphics  grDevices utils     datasets   
>> methods
>> [8] base
>>
>> other attached packages:
>> [1] playwith_0.9-11      cairoDevice_2.8      gWidgetsRGtk2_0.0-36
>> [4] RGtk2_2.12.5-3       gWidgets_0.0-28      latticeExtra_0.5-1
>> [7] RColorBrewer_1.0-2   lattice_0.17-13
>>
>> loaded via a namespace (and not attached):
>> [1] gridBase_0.4-3 tools_2.7.2
>> Warning message:
>> 'DESCRIPTION' file has 'Encoding' field and re-encoding is not  
>> possible
>> > gph <- xyplot(weight ~ height, data=women)
>> > print(gph)
>>
>> *** caught bus error ***
>> address 0xa8, cause 'non-existent physical address'
>>
>> Traceback:
>> 1: .Call(L_newpage)
>> 2: grid.newpage()
>> 3: printFunction(x, ...)
>> 4: print.trellis(gph)
>> 5: print(gph)
>>
>> Possible actions:
>> 1: abort (with core dump, if enabled)
>> 2: normal R exit
>> 3: exit R without saving workspace
>> 4: exit R saving workspace
>> Selection: 1
>> aborting ...
>>
>> Process R bus error at Tue Sep 23 14:01:23 2008
>>
>> John Maindonald             email: john.maindonald at anu.edu.au
>> phone : +61 2 (6125)3473    fax  : +61 2(6125)5549
>> Centre for Mathematics & Its Applications, Room 1194,
>> John Dedman Mathematical Sciences Building (Building 27)
>> Australian National University, Canberra ACT 0200.
>>
>> _______________________________________________
>> R-SIG-Mac mailing list
>> R-SIG-Mac at stat.math.ethz.ch
>> https://stat.ethz.ch/mailman/listinfo/r-sig-mac
>>
>>
>
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