[R-SIG-Mac] quartz crash

[Prof Brian Ripley]

On Fri, 2 May 2008, Byron Ellis wrote:

> Interestingly, the same test on my system (running under gdb in an
> attempt to catch the crash) results in[1] Inf Inf

Which is what X11() gives for me on Linux, and is what I would expect the 
code to give.  Ross Ihaka removed the test of a valid coordinate system in 
2004, but it needs to be conditionally re-instated.  It is OK to ask for 
strwidth() in non-default units without a user coordinate system.

> which is not sensible, but probably more correct than extremely small
> values. With a coordinate system established, strwidth acts as
> advertised. Interestingly, setting family to "mono" or "serif" causes a
> warning to be raised claiming that font 'print.density' (or
> 'print.coefmat' in the latter case) cannot be found, which sounds like a
> mixup in the string hashtable system. In both cases there is no crash
> either with or without gdb and it returns 0 0 along with the warning.
> However, those arbitrary font names are suspicious.
> 
> 
> 
> On Fri, May 2, 2008 at 12:28 AM, Prof Brian Ripley
> <ripley at stats.ox.ac.uk> wrote:
>       You should not be asking for strwidth() without setting up a
>       coordinate system.
>
>             [1] 6.425911e-297 1.927773e-296
> 
> 
> is not 'works ok'.  That's not to say that there is not a quartz
> bug here as well.
> 
> 
> On Thu, 1 May 2008, Luca Scrucca wrote:
>
>       Dear R-Mac-users,
>
>       I got a crash using strwidth() on a quartz device. For
>       example:
>
>             par(family = "mono")
>             strwidth(c("a", "aaa"))
> 
>
>       *** caught bus error ***
>       address 0x10, cause 'non-existent physical address'
>
>       Traceback:
>       1: strwidth(text)
>
>       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:
>
>       Please consider that not setting family to "mono" will
>       result in no crash when strwidth() is called. Also,
>       using the x11 device works ok.
>       For example:
>
>             x11()
>             par(family = "mono")
>             strwidth(c("a", "aaa"))
>
>       [1] 6.425911e-297 1.927773e-296
>
>       I installed the R binary kindly provided at CRAN, as
>       well as binary packages. The OSX is Leopard 10.5.2.
>       These are my R session infos
>             sessionInfo()
>
>       R version 2.7.0 (2008-04-22)
>       i386-apple-darwin8.10.1
>
>       locale:
>       en_GB.UTF-8/en_GB.UTF-8/C/C/en_GB.UTF-8/en_GB.UTF-8
>
>       attached base packages:
>       [1] graphics  utils     datasets  grDevices stats    
>       methods   base
>
>       other attached packages:
>       [1] RColorBrewer_1.0-2 rgl_0.77
>
>       Thanks,
>
>       Luca
> 
>
>       --------------------------------------------------
>       Luca Scrucca
>       Dipartimento di Economia, Finanza e Statistica
>       Sezione di Statistica
>       Università  degli Studi di Perugia
>       Via A. Pascoli, 20
>       06123 PERUGIA  (ITALY)
>       Tel. +39-075-5855233
>       Fax: +39-075-5855950
>       E-mail:   luca at stat.unipg.it
>       Web page: http://www.stat.unipg.it/luca
>       --------------------------------------------------
> 
> 
> --
> Brian D. Ripley,                  ripley at stats.ox.ac.uk
> Professor of Applied Statistics,
>  http://www.stats.ox.ac.uk/~ripley/
> University of Oxford,             Tel:  +44 1865 272861 (self)
> 1 South Parks Road,                     +44 1865 272866 (PA)
> Oxford OX1 3TG, UK                Fax:  +44 1865 272595
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> 
> 
> 
> 
> --
> Byron Ellis (byron.ellis at gmail.com)
> "Oook" -- The Librarian
> 
>

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595