Hi John,
Thanks for your procedure to reliably 'crash' R.app.
On my system sometimes this leads to an immediate crash, sometimes it
happens when I ask for a 2nd plot or use another application after
closing the 1st graphics window. I think using Rcmdr creates a similar
condition as sourcing a file with graphics commands from TextMate.
As a workaround, in all cases, if I go back to the R Console window
and e.g. enter a CR that condition is 'cleared', closing the graphics
window will no longer create an issue.
I've several times tried to track this problem down but never with any
luck. I take it as another artifact of the way documents are created/
deleted in the current R.app.
Rob
On May 1, 2009, at 9:16 AM, John Fox wrote:
Dear Rob,
Thanks for picking this up. Please see my remarks below:
On Fri, 01 May 2009 07:55:46 -0700
Rob Goedman <goed...@mac.com> wrote:
John,
To the best of my knowledge this problem in R.app has been around at
least since the R-2.8 days, but likely much longer. I never use R
from a Terminal, so don't know if it occurs or not outside R.app.
I figured that the Rcmdr wasn't directly implicated, but my guess was
that it was a tcltk issue, so this is very useful information. The
problem didn't occur for me outside of R.app, but then I wasn't using
the Quartz graphics device.
It's not related to Rcmdr and you're observation is indeed one of the
better ways to kind of reproduce the issue. Not sure if it always
does though. If you have a 'hard' way of crashing R.app, please let
me know the sequence. In cases when no output is written to the
console of R.app I tend to make sure I enter an empty line before
closing the graphics window.
This "works" for me every time: (1) In a fresh R.app session, load the
Rcmdr, library(Rcmdr). (2) "Data -> Data in packages -> Read data set
from an attached package." Pick any data set. I used Prestige from the
car package. (3) Draw any graph on the Quartz device. I used "Graphs
->
Histogram" and selected education. Close the Quartz device, and watch
the crash.
I hope that this proves of some use in diagnosing the problem.
This issue and sometimes very long sequences of plots (never have
been able to make that reproducible, sometimes the crash happens up
to a minute after R finishes a series of plots and I'm working in an
external editor like TextMate) are hard to pin down.
Regards,
Rob
Note: Hope you don't mind I've removed the R-bugs & R-devel Cc's.
No -- this is more natural on r-sig-mac.
Thanks for your help,
John
On Apr 30, 2009, at 6:29 AM, John Fox wrote:
Dear Neil,
I had R 2.8.0 installed on my Mac Book, also with OS X 10.5.6, and
was
unable to duplicate this problem. I then installed R 2.9.0 and
observed the
same problem that you did. In both cases, I used the latest version
of the
Rcmdr package, 1.4-10.
I also observed the following: (1) The problem occurred only if I
closed the
Quartz graphics device after the first graph was plotted; if I
plotted
another graph and then closed the device, the problem did not
occur.
(2) The
problem did not occur if I ran R from a terminal with an X11
graphics device
rather than using R.app.
I'm afraid that there's not much more that I can do at this point,
since my
familiarity with Macs is minimal. I'm copying this message to Rob
Goedman,
who has proven helpful in the past. Of course, if there's something
in the
Rcmdr that's causing the problem and I can fix it, I will.
Regards,
John
-----Original Message-----
From: r-devel-boun...@r-project.org
[mailto:r-devel-boun...@r-project.org
]
On
Behalf Of nhepb...@ualberta.ca
Sent: April-28-09 1:25 PM
To: r-de...@stat.math.ethz.ch
Cc: r-b...@r-project.org
Subject: [Rd] crash after using graphics in Rcmdr (PR#13679)
Full_Name: Neil Hepburn
Version: 2.81 and 2.90
OS: OS-X 10.5.6
Submission from: (NULL) (142.244.28.93)
When I create graphs using Rcmdr and then close the quartz
display, R
blows
up
and tells me of a segmentation fault. It then gives me
*** caught segfault ***
address 0xc0000023, cause 'memory not mapped'
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:
This only happens if I create the graphics from within Rcmdr. If I
create
the
graphics manually, there is no problem. This occurs on my laptop
with R
2.8.1
(I
uninstalled 2.9 and reinstall 2.8.1 to see if the problem existed
there)
and
also on my iMac with R2.9.
______________________________________________
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--------------------------------
John Fox, Professor
Department of Sociology
McMaster University
Hamilton, Ontario, Canada
http://socserv.mcmaster.ca/jfox/
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